Sound controlling system for vehicle, vehicle comprising the same, and sound controlling method for vehicle

Abstract

A vehicle acoustic control system according to an embodiment of the present specification comprises a sound generation module disposed on the ceiling of a vehicle corresponding to a seat area of ​​the vehicle and disposed within an acoustic space formed inside the vehicle corresponding to the seat area, and an acoustic processing circuit that provides a vibration driving signal to the sound generation module, wherein the sound generation module vibrates according to the vibration driving signal to vibrate a vibration area of ​​the vehicle ceiling corresponding to the acoustic space and provide sound within the acoustic space.

Description

Technology Field

[0001] The present specification relates to an acoustic control system for a vehicle, a vehicle including the same, and an acoustic control method for a vehicle. Background Technology

[0002] With the advancement of AVN (Audio Video Navigation) systems equipped in vehicles, interest in in-vehicle sound control is increasing. In particular, research is actively underway to adjust the sound output from in-vehicle speakers based on the vehicle's location.

[0003] Since voice coil type loudspeakers are used for speakers installed in vehicles, there is a problem in that it is difficult to create independent acoustic spaces for each seat using sound focusing technology.

[0004] The sound focusing algorithm for forming independent acoustic spaces for each seat stores values ​​specified by initial settings in memory according to the user's desired mode, and controls the sound by loading the values ​​stored in memory according to the given situation. Therefore, it is difficult to control the sound in real time according to various changing situations within the vehicle, such as the movement of passengers, and there is a problem in that it cannot provide optimized sound. The problem to be solved

[0005] Accordingly, the inventors of this specification recognized the aforementioned problems and conducted various experiments on a vehicle acoustic control system capable of forming an independent acoustic space within a vehicle and providing acoustics and stereoscopic sound with enhanced sound quality, a vehicle including the same, and a vehicle acoustic control method. Through these experiments, the inventors invented a vehicle acoustic control system capable of forming an independent acoustic space within a vehicle and providing acoustics and stereoscopic sound with enhanced sound quality, a vehicle including the same, and a vehicle acoustic control method.

[0006] The problem to be solved according to the embodiments of the present specification is to provide a vehicle that includes an independent acoustic space within the vehicle.

[0007] The problem to be solved according to the embodiments of the present specification is to provide a vehicle acoustic control system capable of forming an independent acoustic space within a vehicle and providing stereoscopic acoustics, a vehicle including the same, and a vehicle acoustic control method.

[0008] The problem to be solved according to the embodiments of the present specification is to provide a vehicle acoustic control system capable of minimizing the effects of noise and providing acoustics with improved sound quality, a vehicle including the same, and a vehicle acoustic control method.

[0009] The problems to be solved according to the embodiments of this specification are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0010] A vehicle acoustic control system according to an embodiment of the present specification comprises a sound generation module disposed on the ceiling of a vehicle corresponding to a seat area of ​​the vehicle and disposed within an acoustic space formed inside the vehicle corresponding to the seat area, and an acoustic processing circuit that provides a vibration driving signal to the sound generation module, wherein the sound generation module vibrates according to the vibration driving signal to vibrate a vibration area of ​​the vehicle ceiling corresponding to the acoustic space and provide sound within the acoustic space.

[0011] A vehicle according to an embodiment of the present specification includes an enclosure that is positioned on the ceiling of a vehicle corresponding to a seat area of ​​the vehicle and forms an acoustic space, and an acoustic control system that provides sound to the acoustic space. The acoustic control system includes a sound generation module that is positioned within the enclosure positioned on the ceiling of the vehicle and is positioned within the acoustic space, and an acoustic processing circuit that provides a vibration driving signal to the sound generation module to vibrate the sound generation module, thereby vibrating a vibration area of ​​the vehicle ceiling corresponding to the acoustic space and providing sound within the acoustic space.

[0012] A vehicle acoustic control method according to an embodiment of the present specification includes the steps of: generating a vibration driving signal based on a provided sound source signal; and vibrating a sound generating module disposed in the ceiling of a vehicle corresponding to a seat area and disposed within an acoustic space formed inside the vehicle corresponding to a seat area according to the vibration driving signal, thereby vibrating a vibration area of ​​the vehicle corresponding to the acoustic space to provide sound within the acoustic space.

[0013] Specific details according to various examples of this specification, other than the means for solving the problem mentioned above, are included in the description and drawings below. Effects of the invention

[0014] A vehicle acoustic control system according to an embodiment of the present specification and a vehicle including the same can form an independent acoustic space within the vehicle and can provide stereoscopic sound.

[0015] A vehicle acoustic control system according to an embodiment of the present specification and a vehicle including the same can minimize the effects of noise and provide acoustics of good sound quality.

[0016] A vehicle sound control system according to an embodiment of the present specification and a vehicle including the same can reflect the situation inside the vehicle in real time and provide sound optimized for the current situation.

[0017] The effects of this specification are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description below.

[0018] Since the content of the invention described above regarding the problem to be solved, the means for solving the problem, and the effect does not specify the essential features of the claim, the scope of the claim is not limited by the matters described in the content of the invention. Brief explanation of the drawing

[0019] The drawings attached below are intended to aid in understanding the embodiments of this specification and provide embodiments together with detailed descriptions. However, the technical features of the embodiments are not limited to specific drawings, and the features disclosed in each drawing may be combined with one another to form new embodiments. FIG. 1 is a drawing showing a vehicle according to an embodiment of the present specification. FIG. 2 is a drawing showing a sound generating device placed in a vehicle according to an embodiment of the present specification. FIG. 3 is a drawing showing a sound generating device according to an embodiment of the present specification. Figure 4a is an enlarged view of area A shown in Figure 3. Figure 4b is a cross-sectional view of line I-I' shown in Figure 4a. Fig. 5a is another enlarged view of area A shown in Fig. 3. Figure 5b is a cross-sectional view of line II-II' shown in Figure 5a. Figure 6 is an enlarged view of area B shown in Figure 3. Figure 7 is another enlarged view of area B shown in Figure 3. Figure 8 is a rear view of the acoustic generation module illustrated in Figure 6. Figure 9 is a drawing showing the frame of the sound generation module illustrated in Figure 6. FIG. 10 is a cross-sectional view of line III-III' shown in FIG. 6. FIG. 11 is a cross-sectional view of line IV-IV' shown in FIG. 6. FIG. 12 is a drawing showing a vibration module according to an embodiment of the present specification. FIG. 13 is a cross-sectional view of line V-V' shown in FIG. 12. FIGS. 14 and FIGS. 15 are drawings illustrating an acoustic generation module according to another embodiment of the present specification. FIG. 16 is a drawing showing a sound generation module according to another embodiment of the present specification. FIG. 17 is a cross-sectional view of line V-V' shown in FIG. 16. FIG. 18 is a cross-sectional view of line VI-VI' shown in FIG. 16. FIG. 19 is a drawing showing a vehicle acoustic control system according to an embodiment of the present specification. FIG. 20 is a flowchart illustrating the operation of a vehicle acoustic control system according to an embodiment of the present specification. FIG. 21 is another flowchart illustrating the operation of a vehicle acoustic control system according to an embodiment of the present specification. FIG. 22 is a graph showing the sound pressure level characteristics before and after the application of a plate according to an embodiment of the present specification. FIG. 23 is a graph showing the sound pressure level characteristics before and after the application of a rounded-corner frame according to an embodiment of the present specification. FIG. 24 is a graph showing the amplitude of residual noise before the application of a noise removal algorithm according to an embodiment of the present specification. FIG. 25 is a graph showing the magnitude of residual noise before the application of a noise removal algorithm according to an embodiment of the present specification. FIG. 26 is a graph showing the amplitude of residual noise after applying a noise removal algorithm according to an embodiment of the present specification. FIG. 27 is a graph showing the magnitude of residual noise after applying a noise removal algorithm according to an embodiment of the present specification. FIG. 28 is a drawing showing a vehicle to which a vehicle acoustic control system according to an embodiment of the present specification is applied. FIG. 29 is a graph showing the sound pressure level characteristics of noise received by microphone of a vehicle acoustic control system according to an embodiment of the present specification. Specific details for implementing the invention

[0020] The advantages and features of this specification and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, this specification is not limited to the embodiments disclosed below but may be implemented in various different forms; these embodiments are provided merely to ensure that the disclosure of this specification is complete and to fully inform those skilled in the art of the scope of the invention, and this specification is defined only by the scope of the claims.

[0021] Shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of this specification are exemplary and are not limited to the depicted items. Throughout the specification, the same reference numerals refer to the same components. Furthermore, in describing this specification, if it is determined that a detailed description of related prior art could unnecessarily obscure the essence of this specification, such detailed description is omitted. Where terms such as "includes," "has," or "is made up" are used in this specification, other parts may be added unless "only" is used. Where a component is expressed in the singular, it includes cases where it is included in the plural unless specifically stated otherwise.

[0022] In interpreting the components, even if there is no separate explicit description of the error range, it is interpreted as including the error range.

[0023] In the case of a description of a positional relationship, for example, when the positional relationship between two parts is described using terms such as "on," "on the upper," "on the lower," or "next to," for example, unless "immediately" or "directly" is used, one or more other parts may be located between the two parts.

[0024] In the case of an explanation of temporal relationships, when temporal sequence is explained using "after," "following," "next," "before," etc., cases that are not continuous may be included unless "immediately" or "directly" is used.

[0025] Although terms such as "first," "second," etc. are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the technical scope of this specification.

[0026] In describing the components of this specification, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are intended only to distinguish the components from other components, and the nature, order, sequence, or number of the components are not limited by the terms. Where it is stated that a component is "connected," "coupled," or "joined" to another component, it should be understood that the component may be directly connected or joined to the other component, but that other components may be "interposed" between each component that may be indirectly connected or joined unless specifically stated otherwise.

[0027] "At least one" should be understood to include all combinations of one or more associated components. For example, the meaning of "at least one of the first, second, and third components" may be said to include not only the first, second, or third components, but also all combinations of two or more of the first, second, and third components.

[0028] The features of each of the various embodiments of this specification may be combined or combined with one another, either partially or wholly, and may technically enable various interlocking and operation. Each embodiment may be implemented independently of one another or may be implemented together in an associated relationship.

[0029] The embodiments of this specification are described below through the attached drawings and examples. For the convenience of explanation, the scale of the components shown in the drawings may differ from the actual scale and is therefore not limited to the scale shown in the drawings.

[0030] The features of each of the various embodiments of this specification may be combined or combined with one another, either partially or wholly, and may technically enable various interlocking and operation. Each embodiment may be implemented independently of one another or may be implemented together in an associated relationship.

[0031] The embodiments of this specification are described below through the attached drawings and examples. For the convenience of explanation, the scale of the components shown in the drawings may differ from the actual scale and is therefore not limited to the scale shown in the drawings.

[0032] FIG. 1 is a drawing showing a vehicle according to an embodiment of the present specification. FIG. 2 is a drawing showing a sound generating device placed in a vehicle according to an embodiment of the present specification. FIG. 3 is a drawing showing a sound generating device according to an embodiment of the present specification.

[0033] Referring to FIGS. 1 and FIGS. 2, a vehicle according to an embodiment of the present specification may include an acoustic control system including an acoustic generating device (SGD).

[0034] A sound generating device (SGD) may be installed within a vehicle. For example, the sound generating device (SGD) may be installed on the ceiling of the vehicle. For example, the sound generating device (SGD) may form an independent acoustic space (SS) for each seat and provide independent sound to the independent acoustic space (SS). An acoustic space (SS) is a space through which sound provided to the occupants within the vehicle propagates, and multiple sound generating devices (SGD) may be installed in the vehicle to separate or configure the interior space of the vehicle into multiple acoustic spaces (SS).

[0035] For example, a sound generating device (SGD) may be positioned on the ceiling of a vehicle corresponding to each of the driver's seat area (Front Left, FL), passenger seat area (Front Right, FR), left rear seat area (Rear Left, RL), and right rear seat area (Rear Right, RR). The sound generating device (SGD) positioned corresponding to the driver's seat area (FL) may be a first sound generating device (SGD1), the sound generating device (SGD) positioned corresponding to the passenger seat area (FR) may be a second sound generating device (SGD2), the sound generating device (SGD) positioned corresponding to the left rear seat area (RL) may be a third sound generating device (SGD3), and the sound generating device (SGD) positioned corresponding to the right rear seat area (RR) may be a fourth sound generating device (SGD4).

[0036] For example, the first sound generating device (SGD1) may form a first sound space (SS1) corresponding to the driver's seat area (FL) and provide a first sound (S1) to the first sound space (SS1). For example, the second sound generating device (SGD2) may form a second sound space (SS2) corresponding to the passenger seat area (FR) and provide a second sound (S2) to the second sound space (SS2). For example, the third sound generating device (SGD3) may form a third sound space (SS3) corresponding to the left rear seat area (RL) and provide a third sound (S3) to the third sound space (SS3). For example, the fourth sound generating device (SGD4) may form a fourth sound space (SS4) corresponding to the right rear seat area (RR) and provide a fourth sound (S4) to the fourth sound space (SS4).

[0037] A sound generating device (SGD) may include an enclosure (100) and a sound generating module (200). For example, a first sound generating device (SGD1) may include a first enclosure (100-1) and a first sound generating module (200-1). For example, a second sound generating device (SGD2) may include a second enclosure (100-2) and a second sound generating module (200-2). For example, a third sound generating device (SGD3) may include a third enclosure (100-3) and a third sound generating module (200-3). For example, a fourth sound generating device (SGD4) may include a fourth enclosure (100-4) and a fourth sound generating module (200-4).

[0038] The enclosure (100) forms an independent acoustic space and can be placed on the ceiling of a vehicle. The enclosure (100) can spatially separate sound within the vehicle interior space and may be a structure that constitutes an independent acoustic space. For example, the first enclosure (100-1) may be placed on the ceiling of the vehicle corresponding to the driver's seat area (FL) and form a first acoustic space (SS1). For example, the second enclosure (100-2) may be placed on the ceiling of the vehicle corresponding to the passenger seat area (FR) and form a second acoustic space (SS2). For example, the third enclosure (100-3) may be placed on the ceiling of the vehicle corresponding to the left rear seat area (RL) and form a third acoustic space (SS3). For example, the fourth enclosure (100-4) may be placed on the ceiling of the vehicle corresponding to the right rear seat area (RR) and form a fourth acoustic space (SS4).

[0039] In the following description, unless the first to fourth enclosures (100-1, 100-2, 100-3, 100-4) are described separately, the description of the enclosure (100) may be applied equally to each of the first to fourth enclosures (100-1, 100-2, 100-3, 100-4).

[0040] Referring to FIG. 3, an enclosure (100) according to an embodiment of the present specification may include at least one vent portion (100a to 100f).

[0041] For example, at least one vent section (100a to 100f) may face the inside of the enclosure (100) or the outside of the enclosure (100). For example, at least one vent section (100a to 100f) may face an acoustic generating module (200) placed inside (or in an acoustic space) of the enclosure (100). For example, at least one vent section (100a to 100f) may face the acoustic generating module (200) and may face the acoustic generating module (200) or face the opposite direction of the acoustic generating module (200). For example, at least one vent section (100a to 100d) may face the vibration generator (210) of the acoustic generating module (200) and may face the vibration generator (210) or face the opposite direction of the vibration generator (210). For example, at least one vent (100e, 100e) may face the microphone array (220) of the sound generation module (200) and may face the microphone array (220) or face the opposite direction of the microphone array (220).

[0042] For example, the enclosure (100) may include at least one pair of vent portions (100a, 100b) (100c, 100d) (100e, 100f) facing each other.

[0043] For example, at least one pair of vent portions (100a, 100b) (100c, 100d) (100e, 100f) may face inward toward the enclosure (100) or outward toward the enclosure (100). For example, at least one pair of vent portions (100a, 100b) (100c, 100d) (100e, 100f) may face each other with the sound generation module (200) in between, and may face toward the sound generation module (200) or face in the opposite direction of the sound generation module (200). For example, at least one pair of vent sections (100a, 100b) (100c, 100d) may face each other with the vibration generator (210) of the sound generation module (200) in between, and may face toward the vibration generator (210) or in the opposite direction of the vibration generator (210). For example, at least one pair of vent sections (100e, 100f) may face each other with the microphone array (220) of the sound generation module (200) in between, and may face toward the microphone array (220) or in the opposite direction of the microphone array (220).

[0044] For example, the enclosure (100) may include a pair of first sides (101, 103) positioned along the first direction (or length direction) (Y) of the vehicle and facing each other with the acoustic generating module (200) in between, and a pair of second sides (105, 107) positioned along the second direction (or width direction) (X) of the vehicle and facing each other with the acoustic generating module (200) in between. For example, the pair of first sides (101, 103) may include a first-1 side (101) and a first-2 side (103), and the pair of second sides (105, 107) may include a second-1 side (105) and a second-2 side (107). For example, a pair of first sides (101, 103) and a pair of second sides (105, 107) are connected, and an acoustic space (SS) can be formed by this.

[0045] For example, the vent portion (100a, 100b) may be formed on the first-1 side (101) or the first-2 side (103) of a pair of first sides (101, 103). For example, the vent portion (100a, 100b) may be formed on each of the pair of first sides (101, 103). For example, the vent portion (100c, 100d, 100e, 100f) may be formed on the second-1 side (105) or the second-2 side (107) of a pair of second sides (105, 107). For example, the vent portion (100c, 100e) may be formed on the second-1 side (105) of the pair of second sides (105, 107), and the vent portion (100d, 100f) may be formed on the second-2 side (107) of the pair of second sides (105, 107).

[0046] For example, vent portions (100a, 100b) may be formed on a pair of first sides (101, 103) respectively so as to face each other. For example, vent portions (100a, 100b) may be formed on a pair of first sides (101, 103) respectively so as to face each other with the sound generating module (200) in between. For example, vent portions (110c, 100e) (100d, 100f) may be formed on a pair of second sides (105, 107) respectively so as to face each other. For example, vent portions (110c, 100e) (100d, 100f) may be formed on a pair of second sides (105, 107) respectively so as to face each other with the sound generating module (200) in between. For example, vent portions (100c, 100d) may each be formed on a pair of second sides (105, 107) facing each other with the vibration generator (210) of the sound generation module (200) in between. For example, vent portions (100e, 100f) may each be formed on a pair of second sides (105, 107) facing each other with the microphone array (200) of the sound generation module (200) in between.

[0047] The enclosure (100) can be formed in a shape capable of optimizing sound field control and acoustic characteristics. For example, the enclosure (100) can be formed in a circular, elliptical, or polygonal shape, but the shape of the enclosure (100) is not limited thereto. For example, the first to fourth enclosures (100-1, 100-2, 100-3, 1004) may have the same shape or different shapes.

[0048] FIG. 4a is an enlarged view of area A shown in FIG. 3. FIG. 4b is a cross-sectional view of line I-I' shown in FIG. 4a.

[0049] Referring to FIGS. 4a and 4b, an enclosure (100) according to an embodiment of the present specification is placed on the ceiling (1) of a vehicle and may include a vibration absorbing member (110). For example, the vibration absorbing member (110) can absorb waves (or sound waves or vibration waves) at the corners of the enclosure (100), thereby minimizing reflection. For example, the vibration absorbing member (110) may be formed of a high-density / damping material such as rubber or silicone that is advantageous for vibration damping, a porous material advantageous for sound absorption (e.g., polyurethane, etc.), but is not limited thereto.

[0050] For example, the vibration absorbing member (110) may be composed of a single layer or multiple layers. For example, the vibration absorbing member (110) may include a first vibration absorbing layer (111) formed of a high-density / damping material such as rubber or silicone that is advantageous for vibration damping. For example, the vibration absorbing member (110) may include a second vibration absorbing layer (112) made of a porous material (e.g., polyurethane, etc.) that is advantageous for sound absorption. For example, the vibration absorbing member (110) may include a first vibration absorbing layer (111) and a second vibration absorbing layer (112). For example, the first vibration absorbing layer (111) may be placed on the ceiling of a vehicle, and the second vibration absorbing layer (112) may be placed on the rear side of the first vibration absorbing layer (111). For example, a second vibration absorption layer (112) may be placed on the ceiling of a vehicle, and a first vibration absorption layer (111) may be placed on the rear side of the second vibration absorption layer (112).

[0051] For example, the enclosure (100) may include an adhesive member (or a first adhesive member) (120) disposed on the upper surface (or one surface or one side) of the vibration absorbing member (110). For example, the vibration absorbing member (110) may be disposed on the ceiling of a vehicle via the first adhesive member (120). For example, the first adhesive member (120) may be disposed between the vehicle ceiling (1) and the vibration absorbing member (110).

[0052] For example, the enclosure (100) may include a protective member (or a first protective member) (130) disposed on the lower surface (or other surface or other side) of the vibration absorbing member (110). For example, the first protective member (130) may cover the vibration absorbing member (110) and may minimize or prevent damage to the vibration absorbing member (110) caused by external impact. As damage to the vibration absorbing member (110) is minimized or prevented by the first protective member (130), the degradation of the vibration absorption characteristics of the vibration absorbing member (110) may be minimized or prevented.

[0053] FIG. 5a is another enlarged view of area A shown in FIG. 3. FIG. 5b is a cross-sectional view of line II-II' shown in FIG. 5a.

[0054] FIG. 5a is a modified version of FIG. 4a, with the vibration absorbing member (110) of the enclosure (100) changed. In the following description, redundant descriptions of the same configurations, excluding the modified configuration and related configurations, are briefly described or omitted.

[0055] Referring to FIGS. 5a and 5b, an enclosure (100) according to an embodiment of the present specification may further include an air gap (AG). For example, the air gap (AG) may be formed in a central region of the width (W) of the enclosure (100). For example, the air gap (AG) may be positioned in a central region of the width (W) of the vibration absorbing member (110). For example, the width (W) of the enclosure (100) (or vibration absorbing member (110)) may correspond to the width direction (X) of the vehicle. For example, the air gap (AG) may be formed in the first vibration absorbing layer (111). For example, the air gap (AG) may be formed in the second vibration absorbing layer (112). For example, the air gap (AG) may be formed in the first vibration absorbing layer (111) and the second vibration absorbing layer (112). For example, the enclosure (100) can improve acoustic properties by blocking the diffraction of sound waves (or waves or vibration waves) and forming a back cavity.

[0056] For example, the vibration absorbing member (110) may be separated with an air gap (AG) in between. For example, the vibration absorbing member (110) may include a first vibration absorbing member (110-1) disposed on one side of the air gap (AG) and a second vibration absorbing member (110-2) disposed on the other side of the air gap (AG). For example, the first vibration absorbing member (110-1) and the second vibration absorbing member (110-2) may be spaced apart in the width (W) direction of the enclosure (100), and the space formed by the space between the first vibration absorbing member (110-1) and the second vibration absorbing member (110-2) may be the air gap (AG).

[0057] For example, the first adhesive member (120) can cover the upper surface of the first vibration absorbing member (110-1), the upper surface of the second vibration absorbing member (110-2), and the upper surface of the air gap (AG). For example, the first protective member (130) can cover the lower surface of the first vibration absorbing member (110-1), the lower surface of the second vibration absorbing member (110-2), and the lower surface of the air gap (AG).

[0058] Referring to FIGS. 1 through 3, an acoustic generating module (200) according to an embodiment of the present specification may be placed within an enclosure (100). For example, the acoustic generating module (200) may be placed in an acoustic space (SS) within the enclosure (100) and may provide sound (S) to the acoustic space (SS) by vibrating a vehicle vibration area (or vibration area) corresponding to the acoustic space (SS). For example, the acoustic generating module (200) may be placed on the ceiling of a vehicle. For example, the acoustic generating module (200) may be placed between the frame of the vehicle ceiling and the interior material. For example, one or more acoustic generating modules (200) may be placed in the acoustic space (SS) within the enclosure (100).

[0059] For example, the sound generation module (200) may include first to fourth sound generation modules (200-1, 200-2, 200-3, 200-4).

[0060] For example, a first sound generation module (200-1) may be placed in a first sound space (SS1) within a first enclosure (100-1) and may provide a first sound (S1) to the first sound space (SS1) by vibrating a first vehicle vibration area (or first vibration area) corresponding to the first sound space (SS1). For example, a second sound generation module (200-2) may be placed in a second sound space (SS2) within a second enclosure (100-2) and may provide a second sound (S2) to the second sound space (SS2) by vibrating a second vehicle vibration area (or second vibration area) corresponding to the second sound space (SS2).

[0061] For example, a third sound generation module (200-3) may be placed in a third sound space (SS3) within a third enclosure (100-3) and may provide a third sound (S3) to the third sound space (SS3) by vibrating a third vehicle vibration area (or third vibration area) corresponding to the third sound space (SS3). For example, a fourth sound generation module (200-4) may be placed in a fourth sound space (SS3) within a fourth enclosure (100-4) and may provide a fourth sound (S4) to the fourth sound space (SS4) by vibrating a fourth vehicle vibration area (or fourth vibration area) corresponding to the fourth sound space (SS3).

[0062] For example, each of the first to fourth acoustic generating modules (200-1, 200-2, 200-3, 200-4) may be placed in one or more places in the first to fourth acoustic spaces (SS1, SS2, SS3, SS4).

[0063] In the following description, unless the first to fourth sound generation modules (200-1, 200-2, 200-3, 200-4) are described separately, the description of the sound generation module (200) may be applied equally to each of the first to fourth sound generation modules (200-1, 200-2, 200-3, 200-4).

[0064] FIG. 6 is an enlarged view of area B shown in FIG. 3. FIG. 7 is another enlarged view of area B shown in FIG. 3. FIG. 8 is a rear view of the sound generation module shown in FIG. 6. FIG. 9 is a drawing showing the frame of the sound generation module shown in FIG. 6. FIG. 10 is a cross-sectional view of line III-III' shown in FIG. 6. FIG. 11 is a cross-sectional view of line IV-IV' shown in FIG. 6.

[0065] Referring to FIG. 3 and FIG. 6 through FIG. 11, an acoustic generating module (200) according to an embodiment of the present specification may include a vibration generator (210) and a microphone array (220).

[0066] A vibration generator (210) according to an embodiment of the present specification can generate sound (S) by vibrating a vehicle area (or vibration area) corresponding to an acoustic space (SS) in which a sound generation module (200) is placed, and can provide sound (S) to the acoustic space (SS).

[0067] For example, the sound generation module (200) may include at least one vibration generator (210). For example, the sound generation module (200) may include two vibration generators (210), but is not limited thereto. For example, the sound generation module (200) may include a first vibration generator (210-1) and a second vibration generator (210-2).

[0068] For example, the first vibration generator (210-1) and the second vibration generator (210-2) may be spaced apart by a predetermined distance along the width direction (X) of the vehicle, but are not limited thereto. For example, a microphone array (220) may be placed between the first vibration generator (210-1) and the second vibration generator (210-2), but is not limited thereto. For example, the vibration generator (210) and the microphone array (220) may be placed along the width direction (X) of the vehicle. For example, the first vibration generator (210-1) and the second vibration generator (210-2) may be placed on the upper surface (or front) of the interior material of the vehicle ceiling by a second adhesive member (240).

[0069] The first vibration generator (210-1) and the second vibration generator (210-2) can be formed with the same structure. The following description of the vibration generator (210) can be applied equally to the first vibration generator (210-1) and the second vibration generator (210-2).

[0070] The vibration generator (210) may include at least one vibration module (211). For example, the vibration module (211) vibrates according to a vibration driving signal (or acoustic signal) and can generate sound (S) by vibrating an area of ​​a vehicle (or vibration area) corresponding to an acoustic space (SS) in which the vibration generator (210) is placed, thereby providing sound (S) to the acoustic space (SS).

[0071] As illustrated in FIG. 6, the vibration generator (210) may include one vibration module (211), but is not limited thereto. For example, the vibration generator (210) may include a plurality of vibration modules (211). As illustrated in FIG. 7, the vibration generator (210) may include four vibration modules (211), but is not limited thereto. For example, the vibration generator (210) may include two, three, or five or more vibration modules (211). When the vibration generator (210) includes a plurality of vibration modules (211), the plurality of vibration modules (211) may be arranged in the form of an M×N or N×M matrix (where M is a natural number greater than or equal to 1 and N is a natural number greater than or equal to 2).

[0072] FIG. 12 is a drawing showing a vibration module according to an embodiment of the present specification. FIG. 13 is a cross-sectional view along line V-V' shown in FIG. 12.

[0073] Referring to FIGS. 12 and 13, the vibration module (211) can vibrate by alternately contracting and expanding due to the piezoelectric effect (or piezoelectric properties). For example, the vibration module (211) can directly vibrate the vibration area of ​​the vehicle by vibrating in the thickness direction (Z) by alternately contracting and expanding due to the inverse piezoelectric effect. For example, the vibration module (211) may have a square or square shape, but is not limited thereto.

[0074] A vibration module (211) according to an embodiment of the present specification may include a vibration part (or vibration layer) (PCL), a first electrode layer (E1), and a second electrode layer (E2).

[0075] The vibrating part (PCL) may include a piezoelectric material containing a piezoelectric effect, a composite piezoelectric material, or an electroactive material. The vibrating part (PCL) may be expressed by other terms such as a vibrating layer, a piezoelectric material layer, a piezoelectric composite layer, an electroactive layer, a piezoelectric material part, a piezoelectric composite layer, an electroactive part, a piezoelectric structure, a piezoelectric composite, or a piezoelectric ceramic composite, but is not limited to these terms.

[0076] The vibrating member (PCL) according to the embodiments of the present specification may be composed of a ceramic-based material capable of implementing relatively high vibration. For example, the vibrating member (PCL) may have a 1-3 composite structure or a 2-2 composite structure. For example, the piezoelectric strain coefficient (d33) of the vibrating member (211) along the thickness direction (Z) may be 1,000 pC / N or higher, but is not limited thereto.

[0077] The first electrode layer (E1) is disposed on the first surface (or top surface) of the vibrating part (PCL) and may be electrically connected to the first surface of the vibrating part (PCL). For example, the first electrode layer (E1) may have a through electrode form disposed over the entire first surface of the vibrating part (PCL). The first electrode layer (E1) according to the embodiments of the present specification may be made of a transparent conductive material, a translucent conductive material, or an opaque conductive material. For example, the transparent or translucent conductive material may include ITO (indium tin oxide) or IZO (indium zinc oxide), but is not limited thereto. The opaque conductive material may include aluminum (Al), copper (Cu), gold (Au), silver (Ag), molybdenum (Mo), or magnesium (Mg), or may be made of an alloy thereof, but is not limited thereto.

[0078] The second electrode layer (E2) is disposed on a second surface (or back surface) opposite to the first surface of the vibrating part (PCL) and can be electrically connected to the second surface of the vibrating part (211). For example, the second electrode layer (E2) may have a through electrode form disposed over the entire second surface of the vibrating part (PCL). The second electrode layer (E2) according to the embodiments of this specification may be made of a transparent conductive material, a translucent conductive material, or an opaque conductive material. For example, the second electrode layer (E2) may be made of the same material as the first electrode layer (E1), but is not limited thereto. As another example, the second electrode layer (E2) may be composed of a different material from the first electrode layer (E1).

[0079] The vibrating part (PCL) can be polarized by a constant voltage applied to the first electrode layer (E1) and the second electrode layer (E2) in a constant temperature atmosphere or a temperature atmosphere changing from high temperature to room temperature, but is not limited thereto.

[0080] The vibration module (211) according to the embodiment of the present specification may further include a first protective member (211a) and a second protective member (211b).

[0081] The first protective member (211a) may be placed on the first surface of the vibrating part (PCL). For example, the first protective member (211a) may cover the first electrode layer (E1) placed on the first surface of the vibrating part (PCL). By doing so, the first protective member (211a) may support the first surface of the vibrating part (PCL) and protect the first surface of the vibrating part (PCL) or the first electrode layer (E1).

[0082] The first protective member (211a) according to the embodiment of the present specification may be disposed on the first surface of the vibrating part (PCL) via the first adhesive layer (211c). For example, the first protective member (211a) may be directly disposed on the first surface of the vibrating part (PCL) by a film laminating process via the first adhesive layer (211c).

[0083] The second protective member (211b) may be disposed on the second surface of the vibrating part (PCL). For example, the second protective member (211b) may cover the second electrode layer (E2) disposed on the second surface of the vibrating part (PCL). By doing so, the second protective member (211b) may support the second surface of the vibrating part (PCL) and protect the second surface of the vibrating part (PCL) or the second electrode layer (E2).

[0084] The second protective member (211b) according to the embodiment of the present specification may be disposed on the second surface of the vibrating part (PCL) via the second adhesive layer (211d). For example, the second protective member (211b) may be directly disposed on the second surface of the vibrating part (PCL) by a film laminating process via the second adhesive layer (211d).

[0085] Each of the first protective member (211a) and the second protective member (211b) according to the embodiments of the present specification may include a plastic film. For example, each of the first protective member (211a) and the second protective member (211b) may be a polyimide film or a polyethylene terephthalate film, but is not limited thereto.

[0086] The first adhesive layer (211c) may be disposed on the first surface of the vibrating part (PCL). For example, the first adhesive layer (211c) may be formed on the rear surface (or inner surface) of the first protective member (211a) facing the first surface of the vibrating part (PCL) and disposed on the first surface of the vibrating part (PCL).

[0087] The second adhesive layer (211d) may be disposed on the second surface of the vibrating part (PCL). For example, the second adhesive layer (211d) may be formed on the front surface (or inner surface) of the second protective member (211b) facing the first surface of the vibrating part (PCL) and disposed on the second surface of the vibrating part (PCL).

[0088] The vibrating part (PCL) may be surrounded by a first adhesive layer (211c) and a second adhesive layer (211d). For example, the first adhesive layer (211c) and the second adhesive layer (211d) may completely surround the entire vibrating part (PCL). For example, the first adhesive layer (211c) and the second adhesive layer (211d) may be represented as a cover member, but are not limited thereto. When the first adhesive layer (211c) and the second adhesive layer (211d) are cover members, the first protective member (211a) may be placed on the first surface of the cover member, and the second protective member (211b) may be placed on the second surface of the cover member. For example, the first adhesive layer (211c) and the second adhesive layer (211d) are illustrated as the first adhesive layer (211c) and the second adhesive layer (211d) for convenience of explanation and can be arranged as a single adhesive layer.

[0089] Each of the first adhesive layer (211c) and the second adhesive layer (211d) according to the embodiments of the present specification may include an electrical insulating material that is adhesive and capable of compression and recovery. For example, each of the first adhesive layer (211c) and the second adhesive layer (211d) may include an epoxy resin, an acrylic resin, a silicone resin, or a urethane resin, but is not limited thereto.

[0090] The vibration module (211) according to the embodiment of the present specification may further include a first power supply line (PL1), a second power supply line (PL2), and a pad portion (211e).

[0091] The first power supply line (PL1) may be placed on the first protective member (211a). For example, it may be placed on the rear surface of the first protective member (211a) facing the first surface of the vibrating member (PCL). The first power supply line (PL1) may be electrically connected to the first electrode layer (E1). For example, the first power supply line (PL1) may be directly electrically connected to the first electrode layer (E1). For example, the first power supply line (PL1) may be electrically connected to the first electrode layer (E1) via an anisotropic conductive film. As another example, the first power supply line (PL1) may be electrically connected to the first electrode layer (E1) through a conductive material (or particles) contained in the first adhesive layer (211c).

[0092] The second power supply line (PL2) may be placed in the second protective member (211b). For example, the second power supply line (PL2) may be placed on the front surface of the second protective member (211b) facing the second surface of the vibrating member (PCL). The second power supply line (PL2) may be electrically connected to the second electrode layer (E2). For example, the second power supply line (PL2) may be directly electrically connected to the second electrode layer (E2). For example, the second power supply line (PL2) may be electrically connected to the second electrode layer (E2) via an anisotropic conductive film. As another example, the second power supply line (PL2) may be electrically connected to the second electrode layer (E2) through a conductive material (or particles) contained in the second adhesive layer (211d).

[0093] The pad portion (211e) may be electrically connected to the first power supply line (PL1) and the second power supply line (PL2). For example, the pad portion (211e) may be electrically connected to one side (or one end) of each of the first power supply line (PL1) and the second power supply line (PL2). The pad portion (211e) according to an embodiment of the present specification may include a first pad electrode and a second pad electrode. The first pad electrode may be electrically connected to one side of the first power supply line (PL1). The second pad electrode may be electrically connected to one side of the second power supply line (PL2).

[0094] The vibration module (211) according to the embodiment of the present specification may further include a flexible cable (211f).

[0095] The flexible cable (211f) is electrically connected to a pad portion (211e) disposed in the vibration module (211) and can supply a vibration driving signal supplied from an external device (e.g., an acoustic processing circuit) to the first and second electrode layers (E1, E2). The flexible cable (211f) according to an embodiment of the present specification may include a first terminal and a second terminal. The first terminal may be electrically connected to the first pad electrode of the pad portion (211e). The second terminal may be electrically connected to the second pad electrode of the pad portion (211e). For example, the flexible cable (211f) may be a flexible printed circuit cable or a flexible flat cable, but is not limited thereto.

[0096] For example, the vibration driving signal may be an AC type driving signal including a driving signal of first polarity and a driving signal of second polarity. The driving signal of first polarity may be either a driving signal of positive polarity (+) or a driving signal of negative polarity (-), and the driving signal of second polarity may be either a driving signal of positive polarity (+) or a driving signal of negative polarity (-). For example, the driving signal of first polarity may be supplied to the first electrode layer (E1) of the vibration unit (PCL) through the first terminal of the flexible cable (211f), the first pad electrode of the pad unit (211e), and the first power supply line (PL1). The driving signal of second polarity may be supplied to the second electrode layer (E2) of the vibration unit (PCL) through the second terminal of the flexible cable (211f), the second pad electrode of the pad unit (211e), and the second power supply line (PL2).

[0097] The vibration unit (PCL) according to the embodiment of the present specification may include a plurality of first parts and a plurality of second parts located between the plurality of first parts. The first parts may be inorganic materials, and the second parts may be organic materials. Since the first parts and the second parts may be structured to be connected to each other on a planar surface, the vibration module (211) can be implemented as a single film. When configured in this way, since it can be implemented as a single film compared to a structure in which multiple piezoelectric elements are stacked, a thin-walled vibration generator (210) can be implemented.

[0098] Each of the plurality of first parts according to the embodiments of this specification may include an inorganic material or a piezoelectric material that vibrates by a piezoelectric effect (or piezoelectric property) caused by an electric field. For example, each of the plurality of first parts may be described as an electroactive part, an inorganic material part, a piezoelectric material part, or a vibrating part, but is not limited thereto.

[0099] For example, each of the plurality of first parts may be composed of a ceramic-based material capable of realizing relatively high vibrations or a piezoelectric ceramic having a perovskite-based crystal structure. The perovskite crystal structure possesses piezoelectric and inverse piezoelectric effects and may be an oriented structure. The perovskite crystal structure is represented by the chemical formula ABO3, where A consists of a divalent metal element and B consists of a tetravalent metal element. For example, in the chemical formula ABO3, A and B may be cations, and O may be anions. For example, PbTiO3, PbZrO3, BaTi O3 It may include at least one of , and SrTiO3, but is not limited thereto.

[0100] Perovskite crystal structures can generate a piezoelectric effect by changing the polarization of central ions—for example, Ti ions in the case of PbTiO3—due to external stress or magnetic fields. For instance, perovskite crystal structures can generate a piezoelectric effect by transforming from a symmetric cubic shape to an asymmetric shape, such as tetragonal, orthorhombic, or rhombohedral, under external stress or magnetic fields. Since the morphotropic phase boundary of the asymmetric tetragonal and rhombohedral structures exhibits high polarization and facilitates the rearrangement of polarization, high piezoelectric properties can be achieved.

[0101] For example, the inorganic material constituting each of the plurality of first parts may include one or more of lead (Pb), zirconium (Zr), titanium (Ti), zinc (Zn), nickel (Ni), and niobium (Nb), but is not limited thereto. As another example, the inorganic material constituting each of the plurality of first parts may include a PZT (lead zirconate titanate) system material containing lead (Pb), zirconium (Zr), and titanium (Ti), or a PZNN (lead zirconate nickel niobate) system material containing lead (Pb), zinc (Zn), nickel (Ni), and niobium (Nb), but is not limited thereto. Additionally, the inorganic material may include at least one of CaTiO3, BaTiO3, and SrTiO3 that do not contain lead (Pb), but is not limited thereto.

[0102] Each of the plurality of second parts according to the embodiments of the present specification may have a lower modulus and viscoelasticity compared to the first part, thereby improving the reliability of the first part, which is vulnerable to impact due to brittle characteristics. In order for the vibration module (211) to have impact resistance and high stiffness, each of the plurality of second parts may be composed of a material having a relatively high damping factor (tan δ) and a relatively high stiffness characteristic. For example, each of the plurality of second parts may be composed of a material having a damping factor (tan δ) of 0.1 to 1 [Gpa] and a stiffness characteristic of 0 to 10 [Gpa]. Also, the damping factor (tan δ) and the stiffness characteristic can be explained by the correlation between the loss factor and the modulus, in which case each of the plurality of second parts may be composed of a material having a loss factor of 0.01 to 1 and a modulus of 1 to 10 [Gpa].

[0103] The organic material constituting each of the plurality of second parts may be composed of an organic material or an organic polymer having flexible properties compared to the inorganic material of the first part. For example, each of the plurality of second parts may include an organic material, an organic polymer, an organic piezoelectric material, or an organic non-piezoelectric material. For example, each of the plurality of second parts may be described as an adhesive part, an elastic part, a bending part, a damping part, or a flexible part having flexibility, but is not limited thereto.

[0104] The organic material according to the embodiments of the present specification may include at least one of an organic piezoelectric material and an organic non-piezoelectric material.

[0105] An organic material containing an organic piezoelectric material can improve the overall durability of the vibration module (211) by absorbing shocks applied to the inorganic material (or the first part) and can provide a certain level of piezoelectric properties. The organic piezoelectric material according to the embodiments of this specification may be an organic material having electrically active properties. Since the organic material containing an organic non-piezoelectric material is composed of a curable resin composition and an adhesive containing the same, it can absorb shocks applied to the inorganic material (or the first part) and improve the overall durability of the vibration module (211). The organic non-piezoelectric material according to the embodiments of this specification may include at least one of an epoxy-based polymer, an acrylic-based polymer, and a silicone-based polymer, but is not limited thereto.

[0106] For example, an organic material containing an organic non-piezoelectric material may include an adhesion promoter for adhesion to epoxy resin and inorganic material for high rigidity characteristics required for the vibration module (211). For example, the adhesion promoter may be a phosphate-based material. The organic material may be cured by at least one curing method among thermal curing and photocuring. When curing the organic material, a solvent-free type epoxy resin may be used to prevent the thickness uniformity of the vibration module (211) from decreasing due to shrinkage of the organic material caused by the volatilization of the solvent.

[0107] In addition, the organic material containing the organic non-piezoelectric material may further include a reinforcing agent for damping characteristics in addition to the high rigidity of the vibration module (211). For example, the reinforcing agent may be a core-shell type MBS (Methylmethacrylate-Butadiene-styrene), and the content of the reinforcing agent may be 5 to 40 wt%. For example, the reinforcing agent may be a core-shell type elastomer, and the shell portion may have a high bonding strength with an epoxy resin such as an acrylic polymer, thereby improving the impact resistance or damping characteristics of the vibration generating device (200).

[0108] For example, a plurality of first parts and a plurality of second parts may have the same or different sizes (or widths) from each other, and may be arranged alternately and repeatedly along a first direction (X) (or a second direction (Y)), and may include a line shape or a stripe shape. For example, a plurality of first parts may be arranged spaced apart from each other along the first direction (X) and the second direction (Y), and each of a plurality of second parts may be arranged to fill the gap between adjacent first parts or to surround each of the first parts. For example, the first parts may have the same size from each other and may be arranged in a grid shape, and may have a planar structure such as a circle shape, an ellipse shape, a polygonal shape, or a donut shape.

[0109] Referring to FIGS. 6 through 8, FIG. 10, and FIG. 11, the vibration generator (210) may further include a plate (212). For example, the plate (212) may be positioned on the front or rear of the vibration module (211). For example, as shown in FIG. 7, if the vibration generator (210) includes a plurality of vibration modules (211), the plate (212) may be positioned in common on the front or rear of the plurality of vibration modules (211), but is not limited thereto. For example, if the vibration generator (210) includes a plurality of vibration modules (211), the plate (212) may be positioned on the front or rear of each of the plurality of vibration modules (211).

[0110] A plate (212) is positioned on the rear of a vibration module (211) to reinforce the mass of the vibration module (211), thereby reducing the resonance frequency of the vibration module (211) due to the increase in mass. This increases the low-frequency acoustic characteristics and low-frequency sound pressure characteristics generated in conjunction with the vibration of the vibration module (211), and improves the flatness of the acoustic characteristics. Here, the flatness of the acoustic characteristics may be the magnitude of the deviation between the highest sound pressure and the lowest sound pressure. For example, the plate (212) may be described as a weight member, a mass member, or an acoustic flattening member, but is not limited to such terms.

[0111] For example, the plate (212) may be a mass of a high-density material, for example, a metal material. For example, the plate (212) may be made of one or more of stainless steel, aluminum (Al), magnesium (Mg) alloy, magnesium lithium (Mg-Li) alloy, and aluminum (Al) alloy, but is not limited thereto.

[0112] For example, the plate (212) may be placed on the vibration module (211) via a third adhesive member (213). For example, the third adhesive member (213) may be placed between the vibration module (211) and the plate (212). For example, the third adhesive member (213) may be an acrylic-based or urethane-based adhesive member, but is not limited thereto. For example, the third adhesive member (213) may include a double-sided foam adhesive pad having an acrylic-based adhesive layer or an acrylic-based adhesive resin curing layer.

[0113] Referring to FIGS. 6 through 11, a microphone array (220) according to an embodiment of the present specification may be positioned adjacent to a vibration generator (210). For example, the microphone array (220) may be positioned between a first vibration generator (210-1) and a second vibration generator (210-2). For example, the microphone array (220) may be composed of a plurality of microphones (221) that can be beam-formed. Since the acoustic generation module (200) according to an embodiment of the present specification includes a microphone array (220) composed of a plurality of microphones (221), noise at a desired location can be input through beam-forming control of the plurality of microphones (221). The noise received by the microphone array (220) can be used for Active Noise Cancellation (ANC). The plurality of microphones (221) of the microphone array (220) can receive ambient noise and provide an electrical signal (noise signal) corresponding to the noise to a noise processing circuit. For example, some of the multiple microphones (221) (a first group of microphones) may be used to receive noise for active noise cancellation (ANC), and the rest of the multiple microphones (221) (a first group of microphones) may be used to receive noise for measuring reduced noise characteristics. For example, noise received by some of the microphones of the multiple microphones (221) may be used as noise for ANC, and noise received by the rest of the microphones of the multiple microphones (221) may be used as noise for measuring reduced noise characteristics.

[0114] Since the sound generation module (200) according to the embodiment of the present specification is placed in each of the plurality of sound spaces (SS1, SS2, SS3, SS4), the microphone array (220) of the sound generation module (200) can also be placed in each of the plurality of sound spaces (SS1, SS2, SS3, SS4).

[0115] For example, a plurality of microphones (221) of a microphone array (220) of a sound generation module (200) placed in a first acoustic space (SS1) can receive noise within the first acoustic space (SS1). For example, a plurality of microphones (221) of a microphone array (220) of a sound generation module (200) placed in a second acoustic space (SS2) can receive noise within the second acoustic space (SS2). For example, a plurality of microphones (221) of a microphone array (220) of a sound generation module (200) placed in a third acoustic space (SS3) can receive noise within the third acoustic space (SS3). For example, a plurality of microphones (221) of a microphone array (220) of a sound generation module (200) placed in a fourth acoustic space (SS4) can receive noise within the fourth acoustic space (SS4).

[0116] For example, a plurality of microphones (221) may be arranged along the width direction (X) of the vehicle, but are not limited thereto. For example, a plurality of microphones (221) may be arranged in the form of an M×N or N×M matrix (M is a natural number greater than or equal to 1, N is a natural number greater than or equal to 2).

[0117] Referring to FIGS. 6 and FIGS. 10, a hole (1a) may be formed in the vehicle ceiling corresponding to each of the plurality of microphones (221). For example, the hole (1a) may be formed in the interior material (3) of the vehicle ceiling (1). For example, the hole (1a) may be formed in the interior material (3) of the vehicle ceiling (1) corresponding to the microphone array (220). For example, the hole (1a) may be formed in the interior material (3) of the vehicle ceiling (1) corresponding to the microphone (221) of the microphone array (220). For example, the hole (1a) may be formed in the interior material (3) of the vehicle ceiling (1) corresponding to the groove (233a) formed in the frame (230) of the sound generation module (200). In this way, as the hole (1a) corresponding to the plurality of microphones (221) is formed in the interior material (3) of the vehicle ceiling (1), the sound reception efficiency can be increased so that sound can be received at a desired location.

[0118] Referring to FIGS. 6 through 11, the sound generation module (200) according to an embodiment of the present invention may further include a frame (230). For example, the frame (230) may be placed on a vibration generator (210) and a microphone array (220). For example, the frame (230) may support the vibration generator (210) and the microphone array (220) and stably fix the vibration generator (210) and the microphone array (220) to the vehicle ceiling (1). For example, the frame (230) may be placed on the front of the vibration generator (210) and the front of the microphone array (220) to cover the vibration generator (210) and the microphone array (220). For example, the frame (230) may be made of a film material having flexible properties. For example, the frame (230) may be composed of polyimide (PI) or flexible copper clad laminate (FCCL), but is not limited thereto. For example, the frame (230) may be placed on the rear of the vehicle ceiling (1) via a second adhesive member (240).

[0119] Referring to FIG. 9, the frame (230) may include a first frame portion (231) and a second frame portion (233). For example, the first frame portion (231) and the second frame portion (233) may be formed integrally.

[0120] For example, the first frame portion (231) may be positioned at the front of the vibration generator (210). For example, the first frame portion (231) may support the vibration generator (210) and securely fix the vibration generator (210) to the vehicle ceiling (1).

[0121] For example, the first frame portion (231) may cover the front edge and side of the vibration generator (210). For example, the first frame portion (231) may cover the front edge and side of the vibration module (211) of the vibration generator (210). For example, the first frame portion (231) may include openings (231a-1, 231a-2). For example, the first frame portion (231) may include openings (231a-1, 231a-2) corresponding to the central area of ​​the vibration generator (210). For example, a plate (212) may be placed in the area (exposed area) of the vibration module (211) exposed through the openings (231a-1, 231a-2).

[0122] For example, the first frame section (231) may include a first-1 frame section (231-1) and a first-2 frame section (231-2).

[0123] For example, the first-1 frame portion (231-1) may be positioned at the front of the first vibration generator (210-1) and may support the first vibration generator (210-1). For example, the first-1 frame portion (231-1) may cover the first vibration generator (210-1). For example, the first-1 frame portion (231-1) may cover the front edge and side of the first vibration generator (210-1). For example, the first-1 frame portion (231-1) may cover the vibration module (or first vibration module) (211-1) of the first vibration generator (210-1). For example, the first-1 frame portion (231-1) may cover the front edge and side of the first vibration module (211-1) of the first vibration generator (210-1). For example, the first-1 frame portion (231-1) may include an opening (or first opening) (231a-1) corresponding to the central area of ​​the first vibration generator (210-1). For example, a plate (or first plate) (212-1) may be disposed in the area of ​​the first vibration module (211-1) exposed through the first opening (231a-1).

[0124] For example, the first-2 frame portion (231-2) may be positioned at the front of the second vibration generator (210-2) and may support the second vibration generator (210-2). For example, the first-2 frame portion (231-2) may cover the second vibration generator (210-2). For example, the first-2 frame portion (231-2) may cover the front edge and side of the second vibration generator (210-2). For example, the first-2 frame portion (231-2) may cover the vibration module (or second vibration module) (211-2) of the second vibration generator (210-2). For example, the first-2 frame portion (231-2) may cover the front edge and side of the second vibration module (211-2) of the second vibration generator (210-2). For example, the first-second frame portion (231-2) may include an opening (or second opening) (231a-2) corresponding to the central area of ​​the second vibration generator (210-2). For example, a plate (or second plate) (212-2) may be disposed in the area of ​​the second vibration module (211-2) exposed through the second opening (231a-2).

[0125] The second frame portion (233) according to the embodiment of the present specification may be placed on the vehicle ceiling (1). For example, the second frame portion (233) may be placed on the front of the microphone array (220). For example, the second frame portion (233) may support the microphone array (220) and securely fix the microphone array (220) to the vehicle ceiling (1). For example, the second frame portion (233) may cover the microphone array (220).

[0126] For example, the second frame section (233) may be positioned between the first-1 frame section (231-1) and the first-2 frame section (231-2) and connected to the first-1 frame section (231-1) and the first-2 frame section (231-2).

[0127] For example, the second frame portion (233) may include a groove (233a) formed to correspond (or overlap) with the microphone (221) of the microphone array (220). For example, the groove (233a) formed in the second frame portion (233) may correspond (or overlap) with the hole (11) formed in the vehicle ceiling (1). For example, the microphone (221) of the microphone array (220) may be placed (or inserted or received) within the groove (233a) formed in the second frame portion (233).

[0128] FIGS. 14 and FIGS. 15 are drawings illustrating a sound generation module according to another embodiment of the present specification. FIG. 14 is a modified version of FIG. 6 with the vibration generator (210) and frame (230) of the sound generation module (200). FIG. 15 is a modified version of FIG. 7 with the vibration generator (210) and frame (230) of the sound generation module (200). In the following description, redundant descriptions of identical configurations, excluding the modified configuration and related configurations, are briefly described or omitted.

[0129] Referring to FIG. 14, in a sound generation module (200) according to another embodiment of the present specification, the corners of the vibration module (211) of the vibration generator (210) may be rounded. For example, the vibration module (211) may be formed as a square, circle, or ellipse with four rounded corners. In this way, when a vibration module (211) having rounded corners is applied, the sound dip phenomenon is improved, and accordingly, the sound generation module (200) can provide sound having flat sound characteristics. For example, the vibration module (211) of the vibration generator (210) and the first frame (231) of the frame (230) may have the same shape.

[0130] In a sound generation module (200) according to another embodiment of the present specification, the corners of the first frame (231) may be rounded. For example, the first frame (231) may be formed as a square, circle, or ellipse with four rounded corners. In this way, when the first frame (231) having rounded corners is applied, the sound dip phenomenon is improved, and accordingly, the sound generation module (200) can provide sound having flat sound characteristics. For example, the dip phenomenon may be a phenomenon where sound pressure spikes at a specific frequency.

[0131] Referring to FIG. 15, in an acoustic generating module (200) according to another embodiment of the present specification, the corners of each of the plurality of vibration modules (211) of the vibration generator (210) may be rounded. For example, the plurality of vibration modules (211) of the vibration generator (210) may be formed as a square, a circle, or an ellipse with four rounded corners. For example, the plurality of vibration modules (211) of the vibration generator (210) may have the same shape as the first frame (231) of the frame (230).

[0132] For example, among the corners of each of the multiple vibration modules (211), the corner corresponding to the corner of the first frame (231) may be rounded. For example, the vibration generator (210) may include multiple vibration modules (211), and each of the multiple vibration modules (211) may have a square shape with a rounded corner corresponding to the corner of the first frame (231). For example, all corners of each of the multiple vibration modules (211) may be rounded. For example, the vibration generator (210) may include multiple vibration modules (211), and each of the multiple vibration modules (211) may have a square shape with all corners rounded. In this way, when a vibration module (211) having rounded corners is applied, the acoustic dip phenomenon is improved, and accordingly, the acoustic generation module (200) can provide acoustics having flat acoustic characteristics.

[0133] In a sound generation module (200) according to another embodiment of the present specification, the corners of the first frame (231) of the frame (230) may be rounded. For example, the first frame (231) may be a square shape with four rounded corners. In this way, when the first frame (231) having rounded corners is applied, the sound dip phenomenon is improved, and accordingly, the sound generation module (200) can provide sound having flat sound characteristics.

[0134] FIG. 16 is a drawing showing a sound generation module according to another embodiment of the present specification. FIG. 17 is a cross-sectional view along line V-V' shown in FIG. 16. FIG. 18 is a cross-sectional view along line VI-VI' shown in FIG. 16.

[0135] FIG. 16 shows the addition of a vibration transmission member (214) to the vibration generator (210) of the acoustic generation module (200) in FIG. 6. In the following description, redundant descriptions of identical configurations, excluding the modified configuration and related configurations, are briefly described or omitted.

[0136] Referring to FIGS. 16 through 18, in an acoustic generating module (200) according to another embodiment of the present specification, the vibration generator (210) may further include a vibration transmission member (214). For example, the vibration transmission member (214) may be placed on the upper surface (or front) of the vibration module (211). For example, the vibration transmission member (214) may be placed on the upper surface (or front) of the plate (212). For example, the vibration transmission member (214) may be connected to the lower surface (or rear) of the frame (2) of the vehicle ceiling (1).

[0137] For example, the vibration transmission member (214) may be composed of materials such as polyurethane and polyolefin to improve the transmission efficiency of the vibration of the vibration generator (210), but is not limited thereto. According to the embodiment of the present specification, since the vibration transmission member (214) is configured in the vibration generator (210), the vibration of the vibration generator (210) can be efficiently transmitted to the interior material (3) of the vehicle ceiling (1), so that acoustic characteristics and / or sound pressure characteristics can be improved.

[0138] For example, the vibration transmission member (214) may be placed on the upper surface (or front) of the vibration module (211) or on the upper surface (or front) of the plate (212) via the fourth adhesive member (215). For example, the fourth adhesive member (215) may be placed between the upper surface (or front) of the vibration module (211) and the lower surface (or rear) of the vibration transmission member (214). For example, the fourth adhesive member (215) may be placed between the upper surface (or front) of the plate (212) and the lower surface (or rear) of the vibration transmission member (214).

[0139] For example, the vibration transmission member (214) may be placed on the lower surface (or rear) of the frame (2) of the vehicle ceiling (1) via the fifth adhesive member (216). For example, the fifth adhesive member (216) may be placed between the upper surface (or front) of the vibration transmission member (214) and the lower surface (or rear) of the frame (2) of the vehicle ceiling (1).

[0140] For example, the fourth adhesive member (215) and the fifth adhesive member (216) may include a foam pad, double-sided tape, or adhesive, but are not limited thereto. For example, the adhesive layer of each of the fourth adhesive member (215) and the fifth adhesive member (216) may include epoxy, acrylic, silicone, or urethane, but are not limited thereto. For example, the adhesive layer of each of the fourth adhesive member (215) and the fifth adhesive member (216) may include a urethane-based material (or material) having relatively softer properties than acrylic among acrylic and urethane.

[0141] FIG. 19 is a drawing showing a vehicle acoustic control system according to an embodiment of the present specification.

[0142] Referring to FIGS. 1, 2, and 19, a vehicle acoustic control system according to an embodiment of the present specification controls a sound generating module (200) disposed within an acoustic space (SS) formed by an enclosure (100) disposed on the ceiling of a vehicle according to a vibration driving signal corresponding to a sound source, thereby providing sound (S) to the acoustic space (SS).

[0143] For example, a vehicle acoustic control system may include an acoustic generation module (200) and an acoustic processing circuit (or a first signal processing circuit) (310), but is not limited thereto. For example, a vehicle acoustic control system may further include a noise processing circuit (or a second signal processing circuit or a noise removal signal generation circuit) (320), a beamforming control module (330), and an amplification circuit (340).

[0144] The sound generation module (200) is identical to the sound generation module (200) described with reference to FIGS. 6 through 18, so the description thereof is omitted or briefly described.

[0145] For example, the acoustic generation module (200) is placed in an acoustic space (SS) within the enclosure (100), and can provide acoustic sound (S) to the acoustic space (SS) by vibrating a vehicle vibration area (or vibration area) corresponding to the acoustic space (SS) according to a vibration driving signal (or acoustic signal) from the acoustic processing circuit (310).

[0146] For example, the vibration generator (210-1, 210-2) of the sound generation module (200) vibrates according to a vibration driving signal, and the vehicle vibration area corresponding to the sound space (SS) vibrates according to the vibration of the vibration generator (210-1, 210-2), and sound (S) can be provided to the sound space (SS) by the vibration of the vehicle vibration area.

[0147] The sound generation module (200) may include first to fourth sound generation modules (200-1, 200-2, 200-3, 200-4), but is not limited thereto.

[0148] For example, the first sound generation module (200-1) may be placed in the first sound space (SS1) within the first enclosure (100-1), and may provide the first sound (S1) to the first sound space (SS1) by vibrating the first vehicle vibration area (or first vibration area) corresponding to the first sound space (SS1) according to the first vibration driving signal (or first sound signal) from the sound processing circuit (310). For example, the vibration generator (210a-1, 210a-2) of the first sound generation module (200-1) may vibrate according to the first vibration driving signal, the first vehicle vibration area corresponding to the first sound space (SS1) may vibrate according to the vibration of the vibration generator (210a-1, 210a-2), and the first sound (S1) may be provided to the first sound space (SS1) by the vibration of the first vehicle vibration area.

[0149] For example, the second sound generation module (200-2) may be placed in the second sound space (SS2) within the second enclosure (100-2), and may provide the second sound (S2) to the second sound space (SS2) by vibrating the second vehicle vibration area (or second vibration area) corresponding to the second sound space (SS2) according to the second vibration driving signal (or second sound signal) from the sound processing circuit (310). For example, the vibration generator (210b-1, 210b-2) of the second sound generation module (200-2) may vibrate according to the second vibration driving signal, the second vehicle vibration area corresponding to the second sound space (SS2) may vibrate according to the vibration of the vibration generator (210b-1, 210b-2), and the second sound (S2) may be provided to the second sound space (SS2) by the vibration of the second vehicle vibration area.

[0150] For example, the third sound generation module (200-3) may be placed in the third sound space (SS3) within the third enclosure (100-3), and may provide the third sound (S3) to the third sound space (SS3) by vibrating the third vehicle vibration area (or third vibration area) corresponding to the third sound space (SS3) according to the third vibration driving signal (or third sound signal) from the sound processing circuit (310). For example, the vibration generator (210c-1, 210c-2) of the third sound generation module (200-3) may vibrate according to the third vibration driving signal, the third vehicle vibration area corresponding to the third sound space (SS3) may vibrate according to the vibration of the vibration generator (210c-1, 210c-2), and the third sound (S3) may be provided to the third sound space (SS3) by the vibration of the third vehicle vibration area.

[0151] For example, the fourth sound generation module (200-4) may be placed in the fourth sound space (SS4) within the fourth enclosure (100-4), and may provide the fourth sound (S4) to the fourth sound space (SS4) by vibrating the fourth vehicle vibration area (or fourth vibration area) corresponding to the fourth sound space (SS4) according to the fourth vibration driving signal (or fourth sound signal) from the sound processing circuit (310). For example, the vibration generator (210d-1, 210d-2) of the fourth sound generation module (200-4) may vibrate according to the fourth vibration driving signal, the fourth vehicle vibration area corresponding to the fourth sound space (SS4) may vibrate according to the vibration of the vibration generator (210d-1, 210d-2), and the fourth sound (S4) may be provided to the fourth sound space (SS4) by the vibration of the fourth vehicle vibration area.

[0152] The sound processing circuit (310) according to the embodiment of the present specification receives a sound source signal corresponding to a sound source and can generate a vibration driving signal (or sound signal) based on the sound source signal and output it to a sound generation module (200).

[0153] For example, the sound processing circuit (310) may receive a sound source signal from a sound source providing system (10). For example, the sound source providing system (10) may be a vehicle convenience system such as a navigation system, audio system, multimedia system, etc. installed in a vehicle, but is not limited thereto.

[0154] For example, the acoustic processing circuit (310) receives a noise removal signal from the noise processing circuit (320) and can generate a vibration driving signal based on the sound source signal and the noise removal signal. For example, the acoustic processing circuit (310) can generate a vibration driving signal by combining the sound source signal and the noise removal signal.

[0155] In this way, when the sound processing circuit (310) vibrates the sound generation module (200) according to a vibration driving signal including a noise removal signal to provide sound (S), the provided sound (S) also includes sound corresponding to the noise removal signal, so the noise can be canceled out by the sound corresponding to the noise removal signal.

[0156] For example, the sound processing circuit (310) receives first to fourth noise removal signals from the noise processing circuit (320) and can generate first to fourth vibration driving signals based on the sound source signal and the first to fourth noise removal signals.

[0157] For example, the sound processing circuit (310) may generate a first vibration driving signal based on a sound source signal and a first noise removal signal and provide the first vibration driving signal to the first sound generation module (200-1). For example, the sound processing circuit (310) may generate a second vibration driving signal based on a sound source signal and a second noise removal signal and provide the second vibration driving signal to the second sound generation module (200-2). For example, the sound processing circuit (310) may generate a third vibration driving signal based on a sound source signal and a third noise removal signal and provide the third vibration driving signal to the third sound generation module (200-3). For example, the sound processing circuit (310) may generate a fourth vibration driving signal based on a sound source signal and a fourth noise removal signal and provide the fourth vibration driving signal to the fourth sound generation module (200-4).

[0158] A noise processing circuit (320) according to an embodiment of the present specification may receive a noise signal from a microphone array (220) of an acoustic generation module (200). For example, the noise processing circuit (320) may receive a noise signal from a plurality of microphones (221) of the microphone array (220). For example, the noise processing circuit (320) may receive a noise signal from a first group of microphones of the microphone array (220). The noise processing circuit (320) may generate a noise removal signal based on the received noise signal and provide the generated noise removal signal to the acoustic processing circuit (310). For example, the noise processing circuit (320) may generate a noise removal signal having a phase opposite to that of the noise signal.

[0159] For example, the noise processing circuit (320) may receive noise signals (first to fourth noises) from microphone arrays (first to fourth microphone arrays) (220a, 220b, 220c, 220d) of each of the first to fourth sound generation modules (200-1, 200-2, 200-3, 200-4) and may generate noise removal signals for each of the first to fourth noise signals. For example, the noise processing circuit (320) may receive noise signals from multiple microphones of each of the first to fourth microphone arrays (220a, 220b, 220c, 220d). For example, the first noise may be noise in the first sound space (SS1), the second noise may be noise in the second sound space (SS2), the third noise may be noise in the third sound space (SS3), and the fourth noise may be noise in the fourth sound space (SS4).

[0160] For example, the noise processing circuit (320) can generate a first noise removal signal based on a first noise signal from a first microphone array (220a) of a first sound generation module (200-1). For example, the noise processing circuit (320) can receive a noise signal from a plurality of microphones (221a) of a first microphone array (220a) of a first sound generation module (200-1) and generate a first noise removal signal based on the noise signal from the plurality of microphones (221a) of a first microphone array (220a). For example, the noise processing circuit (320) can generate a second noise removal signal based on a second noise signal from a second microphone array (220b) of a second sound generation module (200-2). For example, the noise processing circuit (320) receives a noise signal from a plurality of microphones (221b) of the second microphone array (220b) of the second sound generation module (200-2), and can generate a second noise removal signal based on the noise signal from the plurality of microphones (221b) of the second microphone array (220b).

[0161] For example, the noise processing circuit (320) can generate a third noise removal signal based on a third noise signal from a third microphone array (220c) of a third sound generation module (200-3). For example, the noise processing circuit (320) can receive a noise signal from a plurality of microphones (221c) of a third microphone array (220c) of a third sound generation module (200-3) and generate a third noise removal signal based on the noise signal from the plurality of microphones (221c) of the third microphone array (220c). For example, the noise processing circuit (320) can generate a fourth noise removal signal based on a fourth noise signal from a fourth microphone array (220d) of a fourth sound generation module (200-4). For example, the noise processing circuit (320) receives a noise signal from a plurality of microphones (221d) of the fourth microphone array (220d) of the fourth sound generation module (200-4), and can generate a fourth noise removal signal based on the noise signal from the plurality of microphones (221d) of the fourth microphone array (220d).

[0162] For example, the noise processing circuit (320) can measure the intensity of the noise based on the noise signal from the microphone array (220) of the sound generation module (200) and provide the measurement result to the beamforming control module (330). For example, the noise processing circuit (320) can receive a noise signal from the second microphone group of the microphone array (220).

[0163] A beamforming control module (330) according to an embodiment of the present specification can perform beamforming control for a microphone array (220) of an acoustic generation module (200). For example, the beamforming control module (330) can perform beamforming control for a microphone array (220) of an acoustic generation module (200) based on a noise intensity measurement result from a noise processing circuit (320). For example, the beamforming control module (330) can perform beamforming control for each of a plurality of microphones (221) of a microphone array (200) of an acoustic generation module (200).

[0164] For example, the beamforming control module (330) can perform beamforming control for each microphone array (220a, 220b, 220c, 220d) of the first to fourth acoustic generation modules (200-1, 200-2, 200-3, 200-4). For example, the beamforming control module (330) may include the first to fourth beamforming control modules (330-1, 330-2, 330-3, 330-4).

[0165] For example, the first beamforming control module (330-1) can perform beamforming control for the first microphone array (220a) of the first sound generation module (200-1). For example, the second beamforming control module (330-2) can perform beamforming control for the second microphone array (220b) of the second sound generation module (200-2). For example, the third beamforming control module (330-3) can perform beamforming control for the third microphone array (220c) of the third sound generation module (200-3). For example, the fourth beamforming control module (330-4) can perform beamforming control for the fourth microphone array (220d) of the fourth sound generation module (200-4).

[0166] The amplification circuit (340) according to the embodiment of the present specification may be positioned between the sound processing circuit (340) and the sound generation module (200). For example, the amplification circuit (340) may receive and amplify a vibration driving signal output from the sound processing circuit (340) and provide the amplified vibration driving signal to the sound generation module (200). For example, the amplification circuit (340) may be positioned in a signal path (or wiring) between the sound processing circuit (310) and the sound generation module (200). For example, the amplification circuit (340) may be positioned within the sound processing circuit (310) and within the sound generation module (200).

[0167] For example, the amplification circuit section (340) may include first to fourth amplification circuits (340-1, 340-2, 340-3, 340-4).

[0168] For example, the first amplification circuit (340-1) may be placed between the acoustic processing circuit (310) and the first acoustic generation module (200-1). For example, the first amplification circuit (340-1) may receive and amplify a first vibration driving signal output from the acoustic processing circuit (310) and provide the amplified first vibration driving signal to the first acoustic generation module (200-1). For example, the first amplification circuit (340-1) may be placed in a first signal path (or first wiring) between the acoustic processing circuit (310) and the first acoustic generation module (200-1). For example, the first amplification circuit (340-1) may be placed within the acoustic processing circuit (310) and within the first acoustic generation module (200-1).

[0169] For example, the second amplification circuit (340-2) may be placed between the acoustic processing circuit (310) and the second acoustic generation module (200-2). For example, the second amplification circuit (340-2) may receive and amplify a second vibration driving signal output from the acoustic processing circuit (310) and provide the amplified second vibration driving signal to the second acoustic generation module (200-2). For example, the second amplification circuit (340-2) may be placed in a second signal path (or second wiring) between the acoustic processing circuit (310) and the second acoustic generation module (200-2). For example, the second amplification circuit (340-2) may be placed within the acoustic processing circuit (310) and within the second acoustic generation module (200-2).

[0170] For example, the third amplification circuit (340-3) may be placed between the acoustic processing circuit (310) and the third acoustic generation module (200-3). For example, the third amplification circuit (340-3) may receive and amplify a third vibration driving signal output from the acoustic processing circuit (310) and provide the amplified third vibration driving signal to the third acoustic generation module (200-3). For example, the third amplification circuit (340-3) may be placed in a third signal path (or third wiring) between the acoustic processing circuit (310) and the third acoustic generation module (200-3). For example, the third amplification circuit (340-3) may be placed within the acoustic processing circuit (310) and within the third acoustic generation module (200-3).

[0171] For example, the fourth amplification circuit (340-4) may be placed between the acoustic processing circuit (310) and the fourth acoustic generation module (200-4). For example, the fourth amplification circuit (340-4) may receive and amplify a fourth vibration driving signal output from the acoustic processing circuit (310) and provide the amplified fourth vibration driving signal to the fourth acoustic generation module (200-4). For example, the fourth amplification circuit (340-4) may be placed in a fourth signal path (or fourth wiring) between the acoustic processing circuit (310) and the fourth acoustic generation module (200-4). For example, the fourth amplification circuit (340-4) may be placed within the acoustic processing circuit (310) and within the fourth acoustic generation module (200-4).

[0172] FIG. 20 is a flowchart illustrating the operation of a vehicle acoustic control system according to an embodiment of the present specification.

[0173] Referring to FIGS. 1, FIGS. 2, FIGS. 19, and FIGS. 20, the acoustic processing circuit (310) receives an acoustic source signal from the acoustic source providing system (10) and can generate a vibration driving signal based on the acoustic source signal (S2000). The vibration driving signal generated by the acoustic processing circuit (310) in step S2000 can be output to the acoustic generation module (200).

[0174] In step S2000, the acoustic processing circuit (310) can generate a first vibration driving signal for a first acoustic generating module (200-1) placed in a first acoustic space (SS1) formed corresponding to the driver's seat area (FL), a second vibration driving signal for a second acoustic generating module (200-2) placed in a second acoustic space (SS2) formed corresponding to the passenger seat (FR), a third vibration driving signal for a third acoustic generating module (200-3) placed in a third acoustic space (SS3) formed corresponding to the left rear seat area (RL), and a fourth vibration driving signal for a fourth acoustic generating module (200-4) placed in a fourth acoustic space (SS4) formed corresponding to the right rear seat area (RR).

[0175] In this way, since the sound processing circuit (310) generates first to fourth vibration driving signals for first to fourth sound generating modules (200-1, 200-2, 200-3, 200-4) respectively placed in first to fourth sound spaces (SS1, SS2, SS3, SS4) formed for each seat in the vehicle, independent sounds (S1, S2, S3, S4) for each seat in the vehicle can be provided.

[0176] Before the vibration driving signal generated in step S2000 is input to the sound generation module (200), the amplification circuit (340) can amplify the vibration driving signal (S2010).

[0177] In step S2010, the amplification circuit (340) receives and amplifies the vibration driving signal output from the acoustic processing circuit (310), and can provide the amplified vibration driving signal to the acoustic generation module (200) (S2020).

[0178] For example, a first amplifier circuit (340-1) may receive and amplify a first vibration driving signal output from an acoustic processing circuit (310) and provide the amplified first vibration driving signal to a first acoustic generation module (200-1). For example, a second amplifier circuit (340-2) may receive and amplify a second vibration driving signal output from an acoustic processing circuit (310) and provide the amplified second vibration driving signal to a second acoustic generation module (200-2). For example, a third amplifier circuit (340-3) may receive and amplify a third vibration driving signal output from an acoustic processing circuit (310) and provide the amplified third vibration driving signal to a third acoustic generation module (200-3). For example, a fourth amplifier circuit (340-4) may receive and amplify a fourth vibration driving signal output from an acoustic processing circuit (310) and provide the amplified fourth vibration driving signal to a fourth acoustic generation module (200-4).

[0179] After step S2020, the sound generation module (200) can provide sound (S) to the acoustic space (SS) by vibrating the vehicle vibration area according to the vibration driving signal (S2030). For example, the vibration generator (210) of the sound generation module (200) vibrates according to the vibration driving signal, the vehicle vibration area corresponding to the acoustic space (SS) vibrates according to the vibration of the vibration generator (210), and sound (S) can be provided to the acoustic space (SS) by the vibration of the vehicle vibration area.

[0180] In step S2030, the first sound generation module (200-1) can vibrate the first vehicle vibration area according to the first vibration driving signal to provide the first sound (S1) to the first sound space (SS1). For example, the vibration generator (210a-1, 210a-2) of the first sound generation module (200-1) vibrates according to the first vibration driving signal, the first vehicle vibration area corresponding to the first sound space (SS1) vibrates according to the vibration of the vibration generator (210a-1, 210a-2), and the first sound (S1) can be provided to the first sound space (SS1) by the vibration of the first vehicle vibration area.

[0181] In step S2030, the second sound generation module (200-2) can vibrate the second vehicle vibration area according to the second vibration driving signal to provide the second sound (S2) to the second sound space (SS2). For example, the vibration generator (210b-1, 210b-2) of the second sound generation module (200-2) vibrates according to the second vibration driving signal, the second vehicle vibration area corresponding to the second sound space (SS2) vibrates according to the vibration of the vibration generator (210a-1, 210a-2), and the second sound (S2) can be provided to the second sound space (SS2) by the vibration of the second vehicle vibration area.

[0182] In step S2030, the third sound generation module (200-3) can provide the third sound (S3) to the third sound space (SS3) by vibrating the third vehicle vibration area according to the third vibration driving signal. For example, the vibration generator (210c-1, 210c-2) of the third sound generation module (200-3) vibrates according to the third vibration driving signal, the third vehicle vibration area corresponding to the third sound space (SS3) vibrates according to the vibration of the vibration generator (210c-1, 210c-2), and the third sound (S3) can be provided to the third sound space (SS3) by the vibration of the third vehicle vibration area.

[0183] In step S2030, the fourth sound generation module (200-4) can vibrate the fourth vehicle vibration area according to the fourth vibration driving signal to provide the fourth sound (S4) to the fourth sound space (SS4). For example, the vibration generators (210d-1, 210d-2) of the fourth sound generation module (200-4) vibrate according to the fourth vibration driving signal, and the fourth vehicle vibration area corresponding to the fourth sound space (SS4) vibrates according to the vibration of the vibration generators (210c-1, 210c-2), and the fourth sound (S4) can be provided to the fourth sound space (SS4) by the vibration of the fourth vehicle vibration area.

[0184] In this way, the vehicle acoustic control system according to the embodiment of the present specification can provide independent acoustics (S1, S2, S3, S4) for each seat in the vehicle by driving first to fourth acoustic generating modules (200-1, 200-2, 200-3, 200-4) respectively arranged in first to fourth acoustic spaces (SS1, SS2, SS3, SS4) formed for each seat in the vehicle.

[0185] FIG. 21 is another flowchart illustrating the operation of a vehicle acoustic control system according to an embodiment of the present specification.

[0186] Referring to FIGS. 1, FIGS. 2, FIGS. 19, and FIGS. 21, a microphone array (220) of an acoustic generation module (200) can receive noise within an acoustic space (SS) (S2100). For example, among a plurality of microphones (221) of the microphone array (220), a microphone designated as a first microphone group can receive noise within the acoustic space (SS). In step S2100, the noise received by the microphone array (220) can be converted into an electrical signal and provided to a noise processing circuit (320). For example, a plurality of microphones (221) of the microphone array (200) can convert the received noise into an electrical signal and provide the noise signal to the noise processing circuit (320).

[0187] For example, a plurality of microphones (221a) of the first microphone array (220a) of the first sound generation module (200-1) may receive a first noise within the first sound space (SS1) and provide a first noise signal corresponding to the first noise to the noise processing circuit (320). For example, a plurality of microphones (221b) of the second microphone array (220b) of the second sound generation module (200-2) may receive a second noise within the second sound space (SS2) and provide a second noise signal corresponding to the second noise to the noise processing circuit (320).

[0188] For example, a plurality of microphones (221c) of the third microphone array (220c) of the third sound generation module (200-3) may receive a third noise within the third sound space (SS3) and provide a third noise signal corresponding to the third noise to the noise processing circuit (320). For example, a plurality of microphones (221d) of the fourth microphone array (220d) of the fourth sound generation module (200-4) may receive a fourth noise within the fourth sound space (SS3) and provide a fourth noise signal corresponding to the fourth noise to the noise processing circuit (320).

[0189] After step S2100, the noise processing circuit (320) can generate a noise removal signal based on a noise signal from the microphone array (220) of the acoustic generation module (200) (S2110). The noise removal signal generated by the noise processing circuit (320) in step S2110 can be provided to the acoustic processing circuit (310).

[0190] In step S2110, the noise processing circuit (320) receives a noise signal from a plurality of microphones (221) of the microphone array (220) of the sound generation module (200), and can generate a noise removal signal based on the received noise signal.

[0191] In step S2110, the noise processing circuit (320) receives noise signals (first to fourth noises) from microphone arrays (first to fourth microphone arrays) (220a, 220b, 220c, 220d) of each of the first to fourth sound generation modules (200-1, 200-2, 200-3, 200-4), and can generate noise removal signals for each of the first to fourth noise signals.

[0192] For example, the noise processing circuit (320) may receive noise signals from a plurality of microphones of each of the first to fourth microphone arrays (220a, 220b, 220c, 220d). For example, the first noise may be noise in the first acoustic space (SS1), the second noise may be noise in the second acoustic space (SS2), the third noise may be noise in the third acoustic space (SS3), and the fourth noise may be noise in the fourth acoustic space (SS4).

[0193] In step S2110, the noise processing circuit (320) receives a noise signal from a plurality of microphones (221a) of the first microphone array (220a) of the first sound generation module (200-1), and can generate a first noise removal signal based on the noise signal from the plurality of microphones (221a) of the first microphone array (220a).

[0194] In step S2110, the noise processing circuit (320) receives a noise signal from a plurality of microphones (221b) of the second microphone array (220b) of the second sound generation module (200-2), and can generate a second noise removal signal based on the noise signal from the plurality of microphones (221b) of the second microphone array (220b).

[0195] In step S2110, the noise processing circuit (320) receives a noise signal from a plurality of microphones (221c) of the third microphone array (220c) of the third sound generation module (200-3), and can generate a third noise removal signal based on the noise signal from the plurality of microphones (221c) of the third microphone array (220c).

[0196] In step S2110, the noise processing circuit (320) receives a noise signal from a plurality of microphones (221d) of the fourth microphone array (220d) of the fourth sound generation module (200-4), and can generate a fourth noise removal signal based on the noise signal from the plurality of microphones (221d) of the fourth microphone array (220d).

[0197] After step S2110, the sound processing circuit (310) can generate a vibration driving signal based on a sound source signal from the sound source providing system (10) and a noise removal signal from the noise processing circuit (320) (S2120). The vibration driving signal generated in step S2120 can be output to the sound generation module (200).

[0198] In step S2120, the acoustic processing circuit (310) can generate a first vibration driving signal for a first acoustic generating module (200-1) placed in a first acoustic space (SS1) formed corresponding to the driver's seat area (FL), a second vibration driving signal for a second acoustic generating module (200-2) placed in a second acoustic space (SS2) formed corresponding to the passenger seat (FR), a third vibration driving signal for a third acoustic generating module (200-3) placed in a third acoustic space (SS3) formed corresponding to the left rear seat area (RL), and a fourth vibration driving signal for a fourth acoustic generating module (200-4) placed in a fourth acoustic space (SS4) formed corresponding to the right rear seat area (RR).

[0199] In this way, since the sound processing circuit (310) generates first to fourth vibration driving signals for first to fourth sound generating modules (200-1, 200-2, 200-3, 200-4) respectively placed in first to fourth sound spaces (SS1, SS2, SS3, SS4) formed for each seat in the vehicle, independent sounds (S1, S2, S3, S4) for each seat in the vehicle can be provided.

[0200] Before the vibration driving signal generated in step S2120 is input to the sound generation module (200), the amplification circuit (340) can amplify the vibration driving signal (S2130).

[0201] In step S2130, the amplification circuit (340) receives and amplifies the vibration driving signal output from the acoustic processing circuit (310), and can provide the amplified vibration driving signal to the acoustic generation module (200) (S2140).

[0202] For example, a first amplifier circuit (340-1) may receive and amplify a first vibration driving signal output from an acoustic processing circuit (310) and provide the amplified first vibration driving signal to a first acoustic generation module (200-1). For example, a second amplifier circuit (340-2) may receive and amplify a second vibration driving signal output from an acoustic processing circuit (310) and provide the amplified second vibration driving signal to a second acoustic generation module (200-2). For example, a third amplifier circuit (340-3) may receive and amplify a third vibration driving signal output from an acoustic processing circuit (310) and provide the amplified third vibration driving signal to a third acoustic generation module (200-3). For example, a fourth amplifier circuit (340-4) may receive and amplify a fourth vibration driving signal output from an acoustic processing circuit (310) and provide the amplified fourth vibration driving signal to a fourth acoustic generation module (200-4).

[0203] After step S2140, the sound generation module (200) can provide sound (S) to the acoustic space (SS) by vibrating the vehicle vibration area according to the vibration driving signal (S2150). For example, the vibration generator (210) of the sound generation module (200) vibrates according to the vibration driving signal, the vehicle vibration area corresponding to the acoustic space (SS) vibrates according to the vibration of the vibration generator (210), and sound (S) can be provided to the acoustic space (SS) by the vibration of the vehicle vibration area.

[0204] In step S2150, the first sound generation module (200-1) can vibrate the first vehicle vibration area according to the first vibration driving signal to provide the first sound (S1) to the first sound space (SS1). For example, the vibration generator (210a-1, 210a-2) of the first sound generation module (200-1) vibrates according to the first vibration driving signal, the first vehicle vibration area corresponding to the first sound space (SS1) vibrates according to the vibration of the vibration generator (210a-1, 210a-2), and the first sound (S1) can be provided to the first sound space (SS1) by the vibration of the first vehicle vibration area.

[0205] In step S2150, the second sound generation module (200-2) can vibrate the second vehicle vibration area according to the second vibration driving signal to provide the second sound (S2) to the second sound space (SS2). For example, the vibration generator (210b-1, 210b-2) of the second sound generation module (200-2) vibrates according to the second vibration driving signal, the second vehicle vibration area corresponding to the second sound space (SS2) vibrates according to the vibration of the vibration generator (210a-1, 210a-2), and the second sound (S2) can be provided to the second sound space (SS2) by the vibration of the second vehicle vibration area.

[0206] In step S2150, the third sound generation module (200-3) can provide the third sound (S3) to the third sound space (SS3) by vibrating the third vehicle vibration area according to the third vibration driving signal. For example, the vibration generator (210c-1, 210c-2) of the third sound generation module (200-3) vibrates according to the third vibration driving signal, the third vehicle vibration area corresponding to the third sound space (SS3) vibrates according to the vibration of the vibration generator (210c-1, 210c-2), and the third sound (S3) can be provided to the third sound space (SS3) by the vibration of the third vehicle vibration area.

[0207] In step S2150, the fourth sound generation module (200-4) can vibrate the fourth vehicle vibration area according to the fourth vibration driving signal to provide the fourth sound (S4) to the fourth sound space (SS4). For example, the vibration generators (210d-1, 210d-2) of the fourth sound generation module (200-4) vibrate according to the fourth vibration driving signal, and the fourth vehicle vibration area corresponding to the fourth sound space (SS4) vibrates according to the vibration of the vibration generators (210c-1, 210c-2), and the fourth sound (S4) can be provided to the fourth sound space (SS4) by the vibration of the fourth vehicle vibration area.

[0208] In this way, the vehicle acoustic control system according to the embodiment of the present specification can provide independent acoustics (S1, S2, S3, S4) for each seat in the vehicle by driving first to fourth acoustic generating modules (200-1, 200-2, 200-3, 200-4) respectively arranged in first to fourth acoustic spaces (SS1, SS2, SS3, SS4) formed for each seat in the vehicle.

[0209] A vehicle acoustic control system according to an embodiment of the present specification provides acoustics (S) by vibrating an acoustic generation module (200) according to a vibration driving signal including a noise removal signal, so that noise can be canceled out by acoustics corresponding to the noise removal signal.

[0210] After step S2150, beamforming control can be performed on a plurality of microphones (221a, 221b, 221c, 221d) of the microphone arrays (220a, 220b, 220c, 220d) of each of the first to fourth acoustic generation modules (200-1, 200-2, 200-3, 200-4) (S2160).

[0211] For example, among the multiple microphones (221) of the microphone array (220), a microphone designated as the second microphone group receives noise in the acoustic space (SS) and provides it to the noise processing circuit (320), the noise processing circuit (320) provides the intensity measurement result for the received noise to the beamforming control module (330), and the beamforming control module (330) can perform beamforming control for multiple microphones (221a, 221b, 221c, 221d) of the microphone arrays (220a, 220b, 220c, 220d) of each of the first to fourth acoustic generation modules (200-1, 200-2, 200-3, 200-4) based on the noise intensity measurement result.

[0212] FIG. 22 is a graph showing the sound pressure level characteristics before and after the application of a plate according to an embodiment of the present specification. In FIG. 22, the horizontal axis represents frequency (Hz), and the vertical axis represents sound pressure level (dB). In FIG. 22, the dotted line represents the sound pressure level characteristics measured in an acoustic generation module without a plate, and the solid line represents the sound pressure level characteristics measured in an acoustic generation module including a plate.

[0213] Referring to FIG. 22, it can be seen that in the low frequency band of approximately 100 Hz to 200 Hz, the sound pressure level measured in the acoustic generation module including the plate (solid line) is higher than the sound pressure level measured in the acoustic generation module without the plate (dotted line). Therefore, by configuring the plate in the acoustic generation module as in the embodiment of the present specification, the sound pressure characteristics and acoustic characteristics in the low frequency range can be improved.

[0214] FIG. 23 is a graph showing the sound pressure level characteristics before and after the application of a frame with rounded corners according to an embodiment of the present specification. In FIG. 23, the horizontal axis represents frequency (Hz), and the vertical axis represents sound pressure level (dB). In FIG. 23, the dotted line represents the sound pressure level characteristics measured in an acoustic generation module including a frame without rounded corners, and the solid line represents the sound pressure level characteristics measured in an acoustic generation module including a frame with rounded corners.

[0215] Referring to FIG. 23, it can be seen that in the frequency band of approximately 200 Hz to 20 kHz, the amount of change in the vibration amplitude of the sound pressure (solid line) measured in an acoustic generating module with a frame having rounded corners is smaller than the amount of change in the vibration amplitude of the sound pressure (dotted line) measured in an acoustic generating module with a frame having non-rounded corners. Therefore, as in the embodiment of this specification, applying rounds to the corners of the frame supporting the vibration generator can improve the flatness of the acoustic characteristics. Here, the flatness of the acoustic characteristics may be the magnitude of the deviation between the highest sound pressure and the lowest sound pressure.

[0216] FIG. 24 is a graph showing the amplitude of residual noise before the application of a noise removal algorithm according to an embodiment of the present specification. FIG. 25 is a graph showing the magnitude of residual noise before the application of a noise removal algorithm according to an embodiment of the present specification. FIG. 26 is a graph showing the amplitude of residual noise after the application of a noise removal algorithm according to an embodiment of the present specification. FIG. 27 is a graph showing the magnitude of residual noise after the application of a noise removal algorithm according to an embodiment of the present specification.

[0217] In FIGS. 24 and 26, the horizontal axis represents time (Time, s), and the vertical axis represents the amplitude of the residual noise. In FIGS. 25 and 27, the horizontal axis represents frequency (Frequency, Hz), and the vertical axis represents the magnitude of the residual noise. FIGS. 24 and 26 show the residual noise in the time domain, and FIGS. 25 and 27 each show the residual noise of FIGS. 24 and 26 in the frequency domain.

[0218] Referring to FIGS. 24 and FIGS. 26, it can be seen that the amplitude of the noise (D2) when the noise removal algorithm according to the embodiment of the present specification is applied across the entire frequency band of the measurement range ( FIG. 26) is significantly smaller than the amplitude of the noise (D1) when the noise removal algorithm according to the embodiment of the present specification is not applied ( FIG. 24).

[0219] Referring to FIGS. 25 and FIGS. 27, it can be seen that in a frequency band of approximately 1000 Hz to 5000 Hz, the magnitude of the noise when the noise removal algorithm according to the embodiment of the present specification is applied ( FIG. 27) is significantly lower than the magnitude of the noise when the noise removal algorithm according to the embodiment of the present specification is not applied ( FIG. 25).

[0220] Referring to FIGS. 24 to 27, if sound is provided by applying a noise removal algorithm according to an embodiment of the present specification, sound with less influence from noise can be provided.

[0221] FIG. 28 is a drawing showing a vehicle to which a vehicle acoustic control system according to an embodiment of the present specification is applied.

[0222] Referring to FIG. 28, the vehicle acoustic control system according to an embodiment of the present specification provides acoustics (S1, S2) including a noise removal signal to an acoustic space (SS1, SS2) by means of ANC control, so that noise (N1, N2) within the acoustic space (SS1, SS2) can be removed. By doing so, a silent zone (QZ1, QZ2, QZ3, QZ4) can be implemented around the ears of a user in the acoustic space (SS1, SS2) within the vehicle.

[0223] Referring to FIGS. 19 and 28, the microphones (221a, 221b) of the first and second microphone arrays (220a, 220b) of the first and second acoustic generation modules (200-1, 200-2) respectively provide the first and second noises within the first and second acoustic spaces (SS1, SS2) to the noise processing circuit (320), and the noise processing circuit (320) can generate second and second noise removal signals to remove the first and second noises and provide them to the acoustic processing circuit (310). The acoustic processing circuit (310) can generate first and second vibration driving signals based on first and second noise removal signals and sound source signals, and supply them to the vibration generators (210a-1, 210a-2, 210b-1, 210b-2) of the first and second acoustic generation modules (200-1, 200-2) so that the vibration generators (210a-1, 210a-2, 210b-1, 210b-2) vibrate, thereby providing acoustics (S1, S2) to the acoustic space (SS1, SS2).

[0224] For example, the microphones (221c, 221d) of the third and fourth microphone arrays (220c, 220d) of the third and fourth sound generation modules (200-3, 200-4) respectively provide the third and fourth noises within the third and fourth sound spaces (SS3, SS4) to the noise processing circuit (320), and the noise processing circuit (320) may generate third and fourth noise removal signals to remove the third and fourth noises and provide them to the sound processing circuit (310). The acoustic processing circuit (310) can generate third and fourth vibration driving signals based on the third and fourth noise removal signals and the sound source signal, and supply them to the vibration generators (210c-1, 210c-2, 210d-1, 210d-2) of the third and fourth acoustic generation modules (200-3, 200-4) so ​​that the vibration generators (210b-2, 210c-1, 210c-2, 210d-1, 210d-2) vibrate, thereby providing acoustics (S3, S4) to the acoustic space (SS3, SS4).

[0225] A vehicle acoustic control system according to an embodiment of the present specification provides acoustics (S1, S2, S3, S4) including a noise removal signal to an acoustic space (SS1, SS2, SS3, SS4) by means of ANC control, thereby removing noise within the acoustic space (SS1, SS2, SS3, SS4) and enabling the implementation of a silent zone around the ears of a user in the acoustic space (SS1, SS2, SS3, SS4) within the vehicle.

[0226] FIG. 29 is a graph showing the sound pressure level characteristics of noise received by each microphone of a vehicle acoustic control system according to an embodiment of the present specification. In FIG. 29, the horizontal axis represents frequency (Hz), and the vertical axis represents sound pressure level (dB). In FIG. 29, the solid line represents the sound pressure level characteristics of noise received by the first microphone, and the dotted line represents the sound pressure level characteristics of noise received by the second microphone at a different location from the first microphone.

[0227] Referring to FIG. 29, it can be seen that the sound pressure levels of the noise received by the first and second microphones at different locations are different. As such, according to an embodiment of the present specification, a vehicle acoustic control system can receive noise having different sound pressure levels for each microphone and independently provide sound to an acoustic space that includes a noise removal signal for the noise received for each microphone. For example, sound with different sound pressure levels can be provided depending on whether the space is bright or dark within the vehicle.

[0228] An acoustic control system for a vehicle according to an embodiment of the present specification, a vehicle including the same, and an acoustic control method for a vehicle may be described as follows.

[0229] A vehicle acoustic system according to an embodiment of the present specification may include a sound generating module disposed on the ceiling of a vehicle corresponding to a seat area of ​​the vehicle and disposed within an acoustic space formed inside the vehicle corresponding to the seat area, and an acoustic processing circuit that provides a vibration driving signal to the sound generating module, wherein the sound generating module may vibrate according to the vibration driving signal to vibrate a vibration area of ​​the vehicle ceiling corresponding to the acoustic space and provide sound within the acoustic space.

[0230] According to some embodiments of the present specification, the acoustic generating module may include a vibration generator comprising at least one vibration module that vibrates according to a vibration driving signal.

[0231] According to some embodiments of the present specification, the acoustic generating module may further include a microphone array comprising a plurality of microphones that is positioned adjacent to a vibration generator.

[0232] According to some embodiments of the present specification, the acoustic generation module may include two vibration generators, and a microphone array may be placed between the two vibration generators.

[0233] According to some embodiments of the present specification, at least one vibration module may include a vibration part comprising a plurality of first parts of an inorganic material and a plurality of second parts of an organic material disposed between the first parts, a first electrode layer disposed on a first surface of the vibration part, and a second electrode layer disposed on a second surface of the vibration part.

[0234] According to some embodiments of the present specification, the vibration generator may further include a vibration transmission member disposed on the front of the vibration module.

[0235] According to some embodiments of the present specification, the vibration generator may further include a plate disposed on the front or rear of the vibration module.

[0236] According to some embodiments of the present specification, the vibration generator may further include a plate disposed on the front of the vibration module and a vibration transmission member disposed on the front of the plate.

[0237] According to some embodiments of the present specification, the acoustic generating module may be positioned between the frame of the vehicle ceiling and the interior material, and the vibration transmitting member may be connected to the rear of the frame of the vehicle ceiling.

[0238] According to some embodiments of the present specification, a vibration generator may include a plurality of vibration modules, and a plate may be commonly disposed in the plurality of vibration modules or disposed in each of the plurality of vibration modules.

[0239] According to some embodiments of the present specification, the sound generation module may be positioned between the frame of the vehicle ceiling and the interior material, and the interior material may include a plurality of microphones and holes formed in corresponding areas.

[0240] According to some embodiments of the present specification, a vehicle acoustic control system may further include a beamforming control module that performs beamforming control for a plurality of microphones of a microphone array.

[0241] According to some embodiments of the present specification, the acoustic generation module may further include a frame covering a vibration generator and a microphone array.

[0242] According to some embodiments of the present specification, the frame may include a first frame portion disposed on the front of a vibration generator and covering the front edge and side of the vibration generator, and a second frame portion disposed on the front of a microphone array and covering the front of the microphone array.

[0243] According to some embodiments of the present specification, the second frame portion may include grooves corresponding to a plurality of microphones of the microphone array.

[0244] According to some embodiments of the present specification, the first frame portion may be composed of one or more of a square, a circle, or an ellipse with rounded corners.

[0245] According to some embodiments of the present specification, the vibration module may have the same shape as the first frame part.

[0246] According to some embodiments of the present specification, a vibration generator may include a plurality of vibration modules, and each of the plurality of vibration modules may have the same shape as a first frame portion.

[0247] According to some embodiments of the present specification, the first frame portion may be formed as a square with rounded corners, and the vibration generator may include a plurality of vibration modules, and each of the plurality of vibration modules may be formed as a square with rounded corners corresponding to the corners of the first frame.

[0248] According to some embodiments of the present specification, an acoustic control system for a vehicle may further include a noise processing circuit that receives a noise signal from a plurality of microphones of a microphone array and generates a noise removal signal having a phase opposite to the noise signal, and the acoustic processing circuit may receive the noise removal signal from the noise processing circuit and generate a vibration driving signal based on a sound source signal and a noise removal signal.

[0249] According to some embodiments of the present specification, the seat area of ​​a vehicle may include first to fourth seat areas, and a sound generation module may be disposed in first to fourth vibration areas of the vehicle ceiling corresponding to each of the first to fourth seat areas, and a sound processing circuit may provide a vibration driving signal to at least one of the sound generation modules disposed in each of the first to fourth seat areas, and at least one sound generation module may vibrate according to the vibration driving signal to vibrate the corresponding vibration area and provide sound within the sound space.

[0250] According to some embodiments of the present specification, the sound generation module may include first to fourth sound generation modules each disposed in first to fourth vibration regions, and the sound processing circuit may provide each of the first to fourth vibration driving signals to the first to fourth sound generation modules, and each of the first to fourth sound generation modules may vibrate according to the corresponding vibration driving signal among the first to fourth vibration driving signals to vibrate the corresponding vibration region among the first to fourth vibration regions and provide a corresponding sound among the first to fourth sounds to the corresponding sound space among the first to fourth sound spaces.

[0251] A vehicle according to an embodiment of the present specification may include an enclosure that is positioned on the ceiling of a vehicle corresponding to a seat area of ​​the vehicle and forms an acoustic space, and an acoustic control system that provides sound to the acoustic space. The acoustic control system may include a sound generation module that is positioned within the enclosure positioned on the ceiling of the vehicle and is positioned within the acoustic space, and an acoustic processing circuit that provides a driving signal to the sound generation module to vibrate the sound generation module, thereby vibrating a vibration area of ​​the vehicle ceiling corresponding to the acoustic space to provide sound within the acoustic space.

[0252] According to some embodiments of the present specification, the enclosure may include at least one vent portion, and at least one vent portion may face inwardly or outwardly toward the enclosure.

[0253] According to some embodiments of the present specification, at least one vent portion faces a sound generating module disposed inside an enclosure and may face the sound generating module or face the opposite direction of the sound generating module.

[0254] According to some embodiments of the present specification, the acoustic generating module may include a vibration generator comprising at least one vibration module that vibrates according to a vibration driving signal, and at least one vent portion may face the vibration generator and may face the vibration generator or face the opposite direction of the vibration generator.

[0255] According to some embodiments of the present specification, the acoustic generating module may further include a microphone array comprising a plurality of microphones that is disposed adjacent to a vibration generator, and at least one vent portion may face the microphone array and may face the microphone array or face in the opposite direction of the microphone array.

[0256] According to some embodiments of the present specification, the enclosure may include at least one pair of vent portions facing each other, and at least one pair of vent portions may face inwardly or outwardly toward the enclosure.

[0257] According to some embodiments of the present specification, at least one pair of vent portions may face an acoustic generating module disposed inside an enclosure and may face the acoustic generating module or face the opposite direction of the acoustic generating module.

[0258] According to some embodiments of the present specification, the acoustic generating module may include a vibration generator comprising at least one vibration module that vibrates according to a vibration driving signal, and at least one pair of vent portions may face each other with the vibration generator in between and may face the vibration generator or face the opposite direction of the vibration generator.

[0259] According to some embodiments of the present specification, the acoustic generating module may further include a microphone array comprising a plurality of microphones that is positioned adjacent to a vibration generator, and at least one pair of vent portions may face each other with the microphone array in between and may face the microphone array or face in the opposite direction of the microphone array.

[0260] According to some embodiments of the present specification, the enclosure may include a vibration-absorbing member disposed on the ceiling of a vehicle.

[0261] According to some embodiments of the present specification, the enclosure may include at least one of a first vibration absorbing layer of a first material and a second vibration absorbing layer of a second material.

[0262] According to some embodiments of the present specification, a first vibration absorbing layer may be disposed on the ceiling of a vehicle and a second vibration absorbing layer may be disposed on the rear, or a second vibration absorbing layer may be disposed on the ceiling of a vehicle and a first vibration absorbing layer may be disposed on the rear of a second vibration absorbing layer.

[0263] According to some embodiments of the present specification, the enclosure may further include an air gap located at the center of the width of the vibration-absorbing member.

[0264] According to some embodiments of the present specification, the enclosure may include a first vibration-absorbing member disposed on one side of the air gap and a second vibration-absorbing member disposed on the other side of the air gap, based on the width of the vibration-absorbing member.

[0265] A vehicle acoustic control method according to an embodiment of the present specification may include the steps of: generating a vibration driving signal based on a provided sound source signal; and vibrating a sound generating module disposed in the ceiling of a vehicle corresponding to a seat area and disposed within an acoustic space formed inside the vehicle corresponding to a seat area according to the vibration driving signal, thereby vibrating a vibration area of ​​the vehicle corresponding to the acoustic space to provide sound within the acoustic space.

[0266] According to some embodiments of the present specification, the seat area of ​​a vehicle may include first to fourth seat areas, and sound generation modules may be disposed in first to fourth vibration areas of the vehicle ceiling corresponding to each of the first to fourth seat areas, and the providing step may include providing a vibration driving signal to at least one of the sound generation modules disposed in each of the first to fourth seat areas, and causing at least one sound generation module to vibrate according to the vibration driving signal so that at least one sound generation module vibrates the corresponding vibration area to provide sound within the sound space.

[0267] According to some embodiments of the present specification, the sound generation module may include first to fourth sound generation modules each disposed in first to fourth vibration regions, and the providing step may include providing each of the first to fourth vibration driving signals to the first to fourth sound generation modules, so that each of the first to fourth sound generation modules vibrates according to the corresponding vibration driving signal among the first to fourth vibration driving signals, thereby vibrating the corresponding vibration region among the first to fourth vibration regions and providing a corresponding sound among the first to fourth sounds to a corresponding sound space among the first to fourth sound spaces.

[0268] According to some embodiments of the present specification, a vehicle acoustic control method may further include the step of generating a noise removal signal having an opposite phase to a noise signal corresponding to noise in an acoustic space, and the step of generating a vibration driving signal may include generating a vibration driving signal based on a sound source signal and a noise removal signal.

[0269] According to some embodiments of the present specification, the step of generating a noise removal signal may include generating a noise removal signal for each of the first to fourth noise signals from each of the acoustic generating modules disposed in the first to fourth seat areas.

[0270] According to some embodiments of the present specification, a vehicle acoustic control method may further include the step of performing beamforming control for a plurality of microphones of a microphone array of an acoustic generation module based on the results of measuring the intensity of noise in an acoustic space.

[0271] According to some embodiments of the present specification, the acoustic generation module may include first to fourth acoustic generation modules each disposed in first to fourth vibration regions, and the step of performing beamforming control may include performing beamforming control for a plurality of microphones of a microphone array of each of the first to fourth acoustic generation modules.

[0272] Although the embodiments of this specification have been described in more detail with reference to the attached drawings, this specification is not necessarily limited to these embodiments and may be modified in various ways within the scope of the technical spirit of this specification. Accordingly, the embodiments disclosed in this specification are intended to explain, not limit, the technical spirit of this specification, and the scope of the technical spirit of this specification is not limited by these embodiments. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. The scope of protection of this specification shall be interpreted by the claims, and all technical spirits within an equivalent scope shall be interpreted as being included within the scope of rights of this specification. Explanation of the symbols

[0273] 100, 100-1, 100-2, 100-3, 100-4: Enclosure 200, 200-1, 200-2, 200-3, 200-4: Acoustic generation module 210, 210-1, 210-2: Vibration generator 211: Vibration Module 220: Microphone Array 221: Mike 230: Frame 310: Acoustic processing circuit 320: Noise processing circuit 330: Beamforming Control Module 340: Amplification circuit section

Claims

Claim 1 A vehicle sound control system comprising: a sound generating module disposed on the vehicle ceiling corresponding to a seat area of ​​the vehicle and disposed within an acoustic space formed inside the vehicle corresponding to said seat area; and an acoustic processing circuit that provides a vibration driving signal to said sound generating module, wherein the sound generating module vibrates according to said vibration driving signal to vibrate a vibration area of ​​the vehicle ceiling corresponding to said acoustic space to provide sound within said acoustic space, and the sound generating module is attached in overlap with the vibration area of ​​said vehicle ceiling and directly vibrates a vehicle interior material corresponding to the vibration area of ​​said vehicle ceiling to provide sound. Claim 2 A vehicle acoustic control system according to claim 1, wherein the acoustic generating module comprises a vibration generator comprising at least one vibration module that vibrates according to the vibration driving signal. Claim 3 In claim 2, the acoustic generation module is disposed adjacent to the vibration generator and further comprises a microphone array including a plurality of microphones, an acoustic control system for a vehicle. Claim 4 In claim 3, the acoustic generation module comprises two vibration generators, and the microphone array is positioned between the two vibration generators, for a vehicle acoustic control system. Claim 5 In claim 2, the at least one vibration module comprises: a vibration part including a plurality of first parts of an inorganic material and a plurality of second parts of an organic material disposed between the first parts; a first electrode layer disposed on a first surface of the vibration part; and a second electrode layer disposed on a second surface of the vibration part, an acoustic control system for a vehicle. Claim 6 In claim 2, the vehicle acoustic control system further comprises a vibration generator having a vibration transmission member disposed in front of at least one vibration module. Claim 7 In claim 2, the vehicle acoustic control system further comprises a plate disposed on the front or rear of at least one vibration module in the vibration generator. Claim 8 In claim 2, the vibration generator further comprises a plate disposed on the front of at least one vibration module and a vibration transmission member disposed on the front of the plate, an acoustic control system for a vehicle. Claim 9 A vehicle acoustic control system according to claim 6 or 8, wherein the acoustic generating module is disposed between the frame of the vehicle ceiling and the interior material, and the vibration transmitting member is connected to the rear of the frame of the vehicle ceiling. Claim 10 An acoustic control system for a vehicle according to claim 7 or 8, wherein the vibration generator comprises a plurality of vibration modules, and the plate is disposed commonly among the plurality of vibration modules or disposed separately among the plurality of vibration modules. Claim 11 In claim 3, the sound generating module is disposed between the frame of the vehicle ceiling and the interior material, and the interior material includes a hole formed in an area corresponding to the plurality of microphones, a vehicle sound control system. Claim 12 A vehicle acoustic control system according to claim 3, further comprising a beamforming control module that performs beamforming control for the plurality of microphones of the microphone array. Claim 13 In claim 3, the acoustic generation module further comprises a frame covering the vibration generator and the microphone array, in a vehicle acoustic control system. Claim 14 In claim 13, the frame comprises: a first frame portion disposed on the front of the vibration generator and covering the front edge and side of the vibration generator; and a second frame portion disposed on the front of the microphone array and covering the front of the microphone array, wherein the frame comprises: a first frame portion disposed on the front of the vibration generator and covering the front edge and side of the vibration generator; and a second frame portion disposed on the front of the microphone array and covering the front of the microphone array, wherein the frame comprises a second frame portion. Claim 15 In claim 14, the second frame portion includes a groove corresponding to the plurality of microphones of the microphone array, in a vehicle acoustic control system. Claim 16 In claim 14, the first frame portion is composed of one or more of a square with rounded corners, a circle, or an ellipse, in a vehicle acoustic control system. Claim 17 In claim 16, the vehicle acoustic control system wherein at least one vibration module has the same shape as the first frame part. Claim 18 In claim 16, the vibration generator comprises a plurality of vibration modules, and each of the plurality of vibration modules has the same shape as the first frame part, an acoustic control system for a vehicle. Claim 19 In claim 16, the first frame portion is formed as a square with rounded corners, the vibration generator includes a plurality of vibration modules, and each of the plurality of vibration modules is formed as a square with rounded corners corresponding to the corners of the first frame, an acoustic control system for a vehicle. Claim 20 A vehicle acoustic control system according to claim 3, further comprising a noise processing circuit that receives a noise signal from a plurality of microphones of the microphone array and generates a noise removal signal having a phase opposite to the noise signal, wherein the acoustic processing circuit receives the noise removal signal from the noise processing circuit and generates the vibration driving signal based on a sound source signal and the noise removal signal. Claim 21 A vehicle acoustic control system according to claim 1, wherein the seat area of ​​the vehicle includes first to fourth seat areas, the acoustic generating module is respectively disposed in first to fourth vibration areas of the vehicle ceiling corresponding to each of the first to fourth seat areas, the acoustic processing circuit provides the vibration driving signal to at least one of the acoustic generating modules disposed in each of the first to fourth seat areas, and the at least one acoustic generating module vibrates according to the vibration driving signal to vibrate the corresponding vibration area and provide acoustics within the acoustic space. Claim 22 In claim 21, the acoustic generation module comprises first to fourth acoustic generation modules each disposed in the first to fourth vibration regions, and the acoustic processing circuit provides each of the first to fourth vibration driving signals to the first to fourth acoustic generation modules, and each of the first to fourth acoustic generation modules vibrates according to the corresponding vibration driving signal among the first to fourth vibration driving signals to vibrate the corresponding vibration region among the first to fourth vibration regions and provide a corresponding sound among the first to fourth sounds to the corresponding acoustic space among the first to fourth acoustic spaces, an acoustic control system for a vehicle. Claim 23 A vehicle comprising: an enclosure positioned on the ceiling of a vehicle corresponding to a seat area and forming an acoustic space; and an acoustic control system for providing sound to the acoustic space, wherein the acoustic control system comprises: a sound generating module positioned within the enclosure positioned on the ceiling of the vehicle and positioned within the acoustic space; and an acoustic processing circuit that provides a vibration driving signal to the sound generating module to vibrate the sound generating module, thereby vibrating a vibration area of ​​the vehicle ceiling corresponding to the acoustic space and providing sound within the acoustic space, wherein the sound generating module is attached in overlap with the vibration area of ​​the vehicle ceiling and directly vibrates a vehicle interior material corresponding to the vibration area of ​​the vehicle ceiling to provide sound. Claim 24 In claim 23, the enclosure comprises at least one vent portion, and the at least one vent portion faces inward or outward of the enclosure, a vehicle. Claim 25 In claim 24, the vehicle, wherein at least one vent portion faces the acoustic generating module disposed inside the enclosure and faces toward the acoustic generating module or toward the opposite direction of the acoustic generating module. Claim 26 In claim 24, the acoustic generating module comprises a vibration generator including at least one vibration module that vibrates according to the vibration driving signal, and the at least one vent portion faces the vibration generator and faces toward the vibration generator or toward the opposite direction of the vibration generator, a vehicle. Claim 27 In claim 26, the sound generating module further comprises a microphone array including a plurality of microphones disposed adjacent to the vibration generator, and the at least one vent portion faces the microphone array and faces toward the microphone array or toward the opposite direction of the microphone array, a vehicle. Claim 28 In claim 23, the enclosure comprises at least one pair of vent portions facing each other, and the at least one pair of vent portions are directed toward the inside of the enclosure or toward the outside of the enclosure, a vehicle. Claim 29 In claim 28, the vehicle, wherein at least one pair of vent portions faces the acoustic generating module disposed inside the enclosure and faces toward the acoustic generating module or toward the opposite direction of the acoustic generating module. Claim 30 In claim 28, the acoustic generating module comprises a vibration generator including at least one vibration module that vibrates according to the vibration driving signal, and the at least one pair of vent portions face each other with the vibration generator in between, facing toward the vibration generator or facing in the opposite direction of the vibration generator, a vehicle. Claim 31 In claim 30, the sound generating module further comprises a microphone array including a plurality of microphones disposed adjacent to the vibration generator, and at least one pair of vent portions facing each other with the microphone array in between, facing toward the microphone array or toward the opposite direction of the microphone array, a vehicle. Claim 32 In claim 23, the vehicle, wherein the enclosure comprises a vibration-absorbing member disposed on the ceiling of the vehicle. Claim 33 In claim 32, the vibration absorbing member comprises at least one of a first vibration absorbing layer of a first material and a second vibration absorbing layer of a second material. Claim 34 In claim 33, the vehicle, wherein the first vibration absorbing layer is disposed on the ceiling of the vehicle and the second vibration absorbing layer is disposed on the rear surface of the first vibration absorbing layer, or wherein the second vibration absorbing layer is disposed on the ceiling of the vehicle and the first vibration absorbing layer is disposed on the rear surface of the second vibration absorbing layer. Claim 35 A vehicle according to claim 33 or 34, wherein the enclosure further comprises an air gap located at the center of the width of the vibration-absorbing member. Claim 36 A vehicle according to claim 35, wherein the enclosure comprises a first vibration-absorbing member disposed on one side of the air gap and a second vibration-absorbing member disposed on the other side of the air gap, based on the width of the vibration-absorbing member. Claim 37 delete Claim 38 A method for controlling sound in a vehicle, comprising: a step of generating a vibration driving signal based on a provided sound source signal; and a step of vibrating a sound generating module, which is positioned on the ceiling of a vehicle corresponding to a seat area and positioned within an acoustic space formed inside the vehicle corresponding to the seat area, according to the vibration driving signal, to vibrate a vibration area of ​​the vehicle corresponding to the acoustic space and provide sound within the acoustic space, wherein the sound generating module is attached in overlap with the vibration area of ​​the vehicle ceiling and directly vibrates a vehicle interior material corresponding to the vibration area of ​​the vehicle ceiling to provide sound. Claim 39 In claim 38, the seat area of ​​the vehicle comprises first to fourth seat areas, and the sound generating module is respectively disposed in first to fourth vibration areas of the vehicle ceiling corresponding to each of the first to fourth seat areas, and the providing step comprises providing the vibration driving signal to at least one of the sound generating modules disposed in each of the first to fourth seat areas, and causing the at least one sound generating module to vibrate according to the vibration driving signal so that the at least one sound generating module vibrates the corresponding vibration area to provide sound within the sound space, thereby providing sound in a vehicle sound control method. Claim 40 In claim 39, the sound generating module comprises first to fourth sound generating modules each disposed in the first to fourth vibration regions, and the providing step comprises providing each of the first to fourth vibration driving signals to the first to fourth sound generating modules, so that each of the first to fourth sound generating modules vibrates according to the corresponding vibration driving signal among the first to fourth vibration driving signals, thereby vibrating the corresponding vibration region among the first to fourth vibration regions and providing a corresponding sound among the first to fourth sounds to the corresponding sound space among the first to fourth sound spaces. Claim 41 A vehicle acoustic control method according to claim 39, further comprising the step of generating a noise removal signal having an opposite phase to a noise signal corresponding to the noise in the acoustic space, wherein the step of generating the vibration driving signal comprises generating the vibration driving signal based on the sound source signal and the noise removal signal. Claim 42 A vehicle acoustic control method according to claim 41, wherein the step of generating the noise removal signal comprises generating a noise removal signal for each of the first to fourth noise signals from each of the acoustic generating modules disposed in the first to fourth seat areas. Claim 43 A vehicle acoustic control method according to claim 39, further comprising the step of performing beamforming control for a plurality of microphones of a microphone array of an acoustic generation module based on the intensity measurement results of noise within the acoustic space. Claim 44 In claim 43, the acoustic generating module comprises first to fourth acoustic generating modules each disposed in the first to fourth vibration regions, and the step of performing beamforming control comprises performing beamforming control for a plurality of microphones of each of the first to fourth acoustic generating modules' microphone arrays, a method for acoustic control for a vehicle.

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