Audio module and vehicle

Abstract

The invention relates to the technical field of terminals, in particular to an audio module and a vehicle. The audio module comprises a base, a loudspeaker and a scatterer, the loudspeaker and the scatterer are both fixed on the base, the scatterer is arranged on the sound outlet side of the loudspeaker, and the scatterer is provided with a first inclined surface inclined towards the loudspeaker; in the first direction, the scatterer is provided with a plurality of scattering grooves with openings located in the first inclined plane, the extending direction of each scattering groove is perpendicular to the first direction, and the first direction is parallel to the base; the plurality of scattering grooves comprise a central scattering groove group and two side scattering groove groups, and the two side scattering groove groups are the same and are symmetrically arranged on the two sides of the central scattering groove group along the first direction. The central scattering groove group corresponds to the central position of the loudspeaker, so that the sound has better uniformity in the horizontal direction; the maximum groove depth of the scattering grooves in the center scattering groove group is larger than the maximum groove depth of the scattering grooves in the side scattering groove groups, the peak valley phenomenon in the sound field frequency response of sound can be weakened, and the hearing experience is improved.

Description

[0001] This application is a divisional application of the original application with the application number 202211329617.9 and the original filing date of October 27, 2022, and the entire contents of the original application are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of terminals, and in particular to an audio module and a vehicle. BACKGROUND

[0003] With the rapid development of automobile intelligence, automobile manufacturers will install an audio module in the vehicle cabin to improve the auditory experience.

[0004] Currently, the audio module is arranged at the control panel of the vehicle cabin or the corner of the A-pillar and the windshield. When listening to the audio module at different positions in the vehicle cabin, the sound difference in the height direction is not large, but the sound difference in the horizontal direction is large. When the sound level emitted by the audio device is not high, the listening experience at different positions in the vehicle cabin is inconsistent, which affects the user experience. SUMMARY

[0005] The present application provides an audio module and a vehicle, which can optimize the sound level uniformity and improve the listening experience of users.

[0006] In a first aspect, the present application provides an audio module and a vehicle. The audio module can be applied to a vehicle or other occasions with high requirements for sound uniformity. The audio module comprises a base, a loudspeaker and a scattering body. The loudspeaker and the scattering body are mounted on the base, and the base can provide support for the loudspeaker and the scattering body. The loudspeaker can emit sound, and the scattering body is arranged on the sound emitting side of the loudspeaker to scatter the sound emitted by the loudspeaker. Specifically, the scattering body has a first inclined surface inclined to the loudspeaker. The included angle between the first inclined surface and the sound emitting surface of the loudspeaker should be an acute angle, so that the sound emitted by the loudspeaker can be projected onto the first inclined surface. In the first direction, the scattering body is provided with a plurality of scattering grooves with openings on the first inclined surface. The extension direction of each scattering groove is perpendicular to the first direction, and the first direction is parallel to the base. The first inclined surface and each scattering groove can reflect the incident sound, so that the first inclined surface and the inner wall of each scattering groove can form a scattering surface to reflect the sound. The sound reflected by the scattering surface will change in phase. When the sound reflected by different scattering grooves meets, the phase will be superimposed or attenuated, so as to change the distribution of the sound in the horizontal direction to achieve the scattering effect and improve the uniformity of the sound in the horizontal direction. The plurality of scattering grooves include a central scattering groove group and two groups of side scattering groove groups. The two groups of side scattering groove groups are the same and symmetrically arranged on both sides of the central scattering groove group, and the central scattering groove group corresponds to the center position of the loudspeaker. The scattering grooves are arranged in a structure symmetrical to the left and right in the first direction, so that the sound has a symmetrical distribution in the first direction, which can further improve the horizontal uniformity of the sound. The maximum groove depth of the scattering grooves in the central scattering groove group is greater than the maximum groove depth of the scattering grooves in the side scattering groove groups. Such a structure can weaken the peak and valley phenomenon in the sound field frequency response of the sound, and improve the listening experience.

[0007] The number of scattering grooves can be even or odd. When the number of scattering grooves is even, the central scattering groove group includes two identical scattering grooves, and the distance from the two scattering grooves to the center position of the loudspeaker is equal. When the number of scattering grooves is odd, the central scattering groove group includes one scattering groove, and the center of the scattering groove corresponds to the center position of the loudspeaker. The more the number of scattering grooves, the greater the horizontal diffusion efficiency of the scattering body to the sound.

[0008] The groove depth of the scattering groove determines the lower limit of the frequency of the sound emitted by the loudspeaker, that is, the groove depth of the scattering groove is related to the minimum frequency of the sound. Specifically, the maximum groove depth of the scattering grooves in the central scattering groove group is less than 4.9 cm.

[0009] The inner wall of the scattering groove includes a bottom wall and two side walls, and the two side walls are respectively located on both sides of the bottom wall in the first direction. The side wall has a first side edge abutting the bottom wall and a second side edge located on the first inclined surface. It should be understood that the first side edge can be a curve or a straight line, and the second side edge can also be a curve or a straight line.

[0010] In some possible implementation manners, the first side and the second side are straight lines, and the first side and the second side are inclined at an included angle. When the included angle between the first side and the second side is 0°, the first side and the second side are parallel to each other, and the groove depths of the scattering grooves at different positions remain unchanged. When the included angle between the first side and the second side is greater than 0°, the groove depth of the scattering groove changes linearly. Possibly, the included angle between the first side and the second side of each scattering groove is equal in size, and the scattering grooves have a more uniform appearance.

[0011] Possibly, the included angle between the first side and the second side of each scattering groove is equal in size, and the scattering grooves have a more uniform appearance.

[0012] Of course, the groove depth of the scattering groove can not change linearly, that is, the second side and the first side can not be simply related by an included angle. On the basis of ensuring the scattering of sound levels, a more rich phase change can be brought to the sound, and the auditory experience can be improved.

[0013] In some possible implementation manners, the connection between the bottom wall and the side wall of the scattering groove can be an angle. Possibly, a chamfer can be arranged at the connection between the bottom wall and the side wall, so that the bottom wall and the side wall are smoothly transitioned.

[0014] The width of the scattering groove determines the upper limit of the frequency of the sound, and the groove depth of the scattering groove is related to the minimum frequency of the sound. Along the first direction, the distance between one end of the group of side scattering grooves away from the center scattering groove group and the other end of the other group of side scattering grooves away from the center scattering groove group is 3.5-10 cm. Wherein, the groove width of each scattering groove can be equal or not equal. And the groove length of each scattering groove is greater than 2 cm, and the groove length of the scattering groove refers to the length of the bottom wall of the scattering groove along the extension direction of the scattering groove.

[0015] Along the first direction, when the groove width of each scattering groove is equal, the groove width of each scattering groove can satisfy the following condition: w1=c air / (2×f max ); Wherein, w1 is the groove width of the scattering groove, c air is the speed of sound, and f max is the maximum frequency of the frequency band of the loudspeaker.

[0016] In some possible implementation manners, the included angle between the first inclined surface and the normal line of the sound outlet surface of the loudspeaker is 30-70°. With such an angle setting, the sound emitted by the loudspeaker has a smaller range distribution in the direction perpendicular to the base after being reflected by the first inclined surface, so that the sound can be concentrated in the height range of the user listening.

[0017] Wherein, the first inclined surface can be a plane or a curved surface, which is not limited here as long as the scattering requirement of the sound can be met.

[0018] In some possible implementation manners, the included angle between the sound outlet surface of the loudspeaker and the base is 0-60°, which provides more possibilities for the propagation direction of the sound. It should be understood that no matter what angle relationship between the sound outlet surface of the loudspeaker and the base, the first inclined surface and the sound outlet surface of the loudspeaker need to meet the requirements of the above technical solutions.

[0019] In a second aspect, the present application provides a vehicle, comprising a vehicle body and any one of the audio modules in the above technical solutions. The audio module is arranged on the vehicle body and can provide a better sound experience for passengers in the vehicle.

[0020] Specifically, the audio module is arranged at the center position of the automobile instrument panel of the vehicle body; or, the audio module is arranged at the corner of the connection between the A-pillar and the windshield of the vehicle body. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A relationship curve between the frequency and the sound pressure level of the sound diffused in the prior art; Figure 2a A brief structure schematic diagram of an audio module provided by an embodiment of the present application; Figure 2b A specific structure schematic diagram of an audio module provided by an embodiment of the present application; Figure 2c A partial structure schematic diagram of an audio module provided by an embodiment of the present application; Figure 3a A sound emitting schematic diagram of a loudspeaker unit of an audio module provided by an embodiment of the present application; Figure 3b A horizontal diffusion schematic diagram of a diffuser of an audio module provided by an embodiment of the present application; Figure 4a A diffuser with an even number of scattering grooves provided by an embodiment of the present application; Figure 4b A diffuser with an odd number of scattering grooves provided by an embodiment of the present application; Figure 5a A groove depth distribution schematic diagram of a scattering groove in an audio module provided by an embodiment of the present application; Figure 5b A groove depth distribution schematic diagram of a scattering groove in an audio module provided by an embodiment of the present application; Figure 6 A relationship curve between the frequency and the sound pressure level of the sound of an audio module provided by an embodiment of the present application; Figure 7a A structure schematic diagram of an audio module provided by an embodiment of the present application; Figure 7b A cross-sectional structure schematic diagram of an audio module provided by an embodiment of the present application; Figure 8a A structure schematic diagram of a scatterer in an audio module provided by an embodiment of the present application; Figure 8b A structure schematic diagram of an audio module provided by an embodiment of the present application; Figure 8a A cross-sectional structure schematic diagram at P-P; Figure 9a A structure schematic diagram of a scatterer in an audio module provided by an embodiment of the present application; Figure 9b A structure schematic diagram of an audio module provided by an embodiment of the present application; Figure 9a A cross-sectional structure schematic diagram at Q-Q; Figure 10a A structure schematic diagram of a scatterer in an audio module provided by an embodiment of the present application; Figure 10b A structure schematic diagram of an audio module provided by an embodiment of the present application; Figure 10a A cross-sectional structure schematic diagram at R-R; Figure 11a A structure schematic diagram of a scattering groove in an audio module provided by an embodiment of the present application; Figure 11b A structure schematic diagram of a scattering groove in an audio module provided by an embodiment of the present application; Figure 11c A structure schematic diagram of a scattering groove in an audio module provided by an embodiment of the present application; Figure 11d A structure schematic diagram of a scattering groove in an audio module provided by an embodiment of the present application; Figure 12 A structure schematic diagram of an audio module provided by an embodiment of the present application; Figure 13a A structure schematic diagram of an audio module provided by an embodiment of the present application; Figure 12 An enlarged view of C part; Figure 13b A structure schematic diagram of a first side edge and a second side edge of a scattering groove in an audio module provided by an embodiment of the present application; Figure 14 A structure schematic diagram of a first side edge and a second side edge of a scattering groove in an audio module provided by an embodiment of the present application; Figure 15 A cross-sectional structure schematic diagram of an audio module provided by an embodiment of the present application; Figure 16a A structure schematic diagram of a vehicle provided by an embodiment of the present application; Figure 16b A structure schematic diagram of a vehicle provided by an embodiment of the present application. DETAILED DESCRIPTION

[0022] With the development of intelligent technology, automobile manufacturers install audio modules in the cabin of the vehicle to improve the listening experience. At present, the sound level uniformity of the sound emitted by the audio module is low, and the listening experience of passengers at different positions in the vehicle cabin is different. In order to improve the sound level uniformity, the sound emitted by the audio module can be diffused. Figure 1 The relationship curve between the frequency and the sound pressure level (SPL) of the sound diffused in the prior art is shown, which can be called a diffused sound field frequency response curve. Among them, the horizontal coordinate represents the frequency of the sound, in hertz (Hz), and the vertical coordinate is the sound pressure level, in (dB). The high-frequency segment shown in the dashed box has obvious peaks and valleys, indicating that the sound intensity changes greatly at this point, affecting the user's experience.

[0023] Based on this, the embodiments of the present application provide an audio module, an electronic device and a vehicle, which can improve the sound level uniformity of high-frequency sound and improve the listening experience.

[0024] The terms used in the following embodiments are only for the purpose of describing the specific embodiments and are not intended to be limiting on the present application. As used in the specification and the appended claims of the present application, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0025] In this specification, the phrase “one embodiment” or “some embodiments” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Thus, the appearances of the phrase “in one embodiment,” “in some embodiments,” “in other embodiments,” “in additional embodiments,” and so on, in various places in the specification are not necessarily all referring to the same embodiment, unless otherwise specifically noted. The terms “including,” “containing,” “comprising,” and similar terms are meant to be open-ended, unless otherwise specifically noted, so as to encompass the various embodiments of the application. Accordingly, programs and non-transitory computer readable media are contemplated as being within the scope of what is claimed.

[0026] As Figure 2a shown, an audio module 1 provided by an embodiment of the present application can be applied to a vehicle, Figure 2aA left view of the structure of the audio module 1 is shown. When the audio module 1 is installed in a cabin of a vehicle, the audio module 1 has high uniformity in the horizontal direction, so that any position in the cabin can have approximately the same sound, and passengers at any position in the cabin will have approximately the same listening experience, thereby obtaining a better listening experience. Specifically, the audio module 1 includes a loudspeaker 11, a diffuser 12, and a base 13, and the loudspeaker 11 and the diffuser 12 are both arranged on the base 13. The loudspeaker 11 is configured to convert electrical energy into sound energy and emit sound.

[0027] As a mechanical wave, sound has a phase, and sound can also be referred to as a sound wave. Based on the phase characteristics of the sound wave, sound waves of different phases may be superimposed or cancelled when they meet. The superposition of sound waves can enhance the sound, and the cancellation of sound waves can weaken the sound. The diffuser 12 in the embodiment of the present application is configured to reflect the incident sound wave. The sound wave incident on the diffuser 12 is reflected at different angles, and the reflected sound waves meet and are superimposed or cancelled, thereby changing the phase of the sound wave. The sound reflected by the diffuser 12 is more uniform in different directions. When the audio module 1 is a tweeter module, the sound emitted by the loudspeaker 11 includes high-frequency sound. The high-frequency sound has the characteristics of short wavelength and strong directivity. The diffuser 12 is arranged on the sound emitting side of the loudspeaker 11 and is configured to scatter the sound emitted by the loudspeaker 11, so as to improve the uniformity of the sound in the horizontal direction.

[0028] Continuing to refer to Figure 2a , if the loudspeaker 11 has a theoretical sound emitting surface B, the sound emitting surface B of the loudspeaker 11 can be parallel to the base 13. In this case, the sound emitting surface B of the loudspeaker 11 is flush with the upper surface of the base 13. The sound emitted by the loudspeaker 11 is a beam-shaped strong directional sound wave, and the beam-shaped strong directional sound wave is perpendicular to a surface, which can be exemplified as the sound emitting surface B in the Figure 2a . Therefore, it can be considered that the sound emitted by the loudspeaker 11 is emitted from the sound emitting surface B.

[0029] The diffuser 12 is fixed to the base 13 and located on the sound emitting side of the loudspeaker 11, and the diffuser 12 has a first inclined surface A1 inclined to the loudspeaker 11. The diffuser 12 also has a bottom end surface A3 configured to contact the base 13 and a top end surface A2 away from the base 13. The first inclined surface A1 and the sound emitting surface B of the loudspeaker 11 form an acute angle a.

[0030] As Figure 2bThe diagram shows a three-dimensional structure of an audio module 1. For ease of illustration, a three-dimensional coordinate system consisting of a first direction X, a second direction Y, and a third direction Z is defined with reference to the base 13. The plane formed by the first direction X and the second direction Y is parallel to the base 13 and also parallel to the sound-emitting surface B of the speaker 11. The third direction Z is perpendicular to the first direction X and the second direction Y, and also perpendicular to the base 13 and the sound-emitting surface B of the speaker 11. To scatter the sound emitted by the speaker 11, multiple scattering grooves 121 with openings on a first inclined surface A1 are provided on the scatterer 12. The opening of each scattering groove 121 is located on the first inclined surface A1, and the two ends of each scattering groove 121 along its length are respectively opposite the top surface A2 and the bottom surface A3 of the scatterer 121. Here, the bottom surface A3 contacts the base 13, so that the end of the scattering groove 121 away from the top surface A2 is located on the base 13. Here, the first inclined surface A1 is inclined towards the base 13, and the multiple scattering grooves 121 are arranged along the first direction X.

[0031] It should be understood that the top surface A2 and bottom surface A3 of the scatterer 12 are only for... Figure 2b The structural description of the scatterer 12 with the shape shown is provided, and the top surface A2 and the bottom surface A3 only indicate the relative positions of the two surfaces, without limiting the shape or other features of the surfaces.

[0032] Combination Figure 2a to Figure 2b As shown, the sound emitted by the speaker 11 can be projected onto the diffuser 12. The first inclined surface A1 of the diffuser 12 and the inner walls of the multiple scattering grooves 121 can form a sound scattering surface, reflecting the sound. Figure 2c The structure of one of the scattering slots 121 is illustrated. The inner wall of the scattering slot 121 includes two side walls 1211 and a bottom wall 1212 located between the two side walls 1211. Specifically, the scattering surface of the scatterer 12 for scattering sound consists of a first inclined surface A1, a bottom wall 1212 of each scattering slot 121, and two side walls 1211. Along the extending direction of the scattering slot 121, the two ends of the scattering slot 121 are located on the top surface A2 and the bottom surface A3 of the scatterer 12, respectively. The length of the bottom wall 1212 along the extending direction of the scattering slot 121 is the slot length H of the scattering slot 121. Along the first direction X, the distance between the two side walls 1211 is the slot width w1 of the scattering slot 121, and the partition between two adjacent scattering slots 121 has a thickness w2. The distance between the bottom wall 1212 and the first inclined surface A1 is the slot depth d of the scattering slot 121. In this diagram, the schematic direction of the groove depth d is perpendicular to the bottom wall 1212. For a scattering groove 121, its groove depth d may vary along the extension direction of the scattering groove 121. Figure 2c In the scattering groove 121 shown, the groove depth d remains unchanged along the extension direction of the scattering groove 121.

[0033] CombinationFigure 2a to Figure 2c As shown, multiple scattering slots 121 are arranged along a first direction X, which is parallel to the base 13, and the extension direction of each scattering slot 121 is perpendicular to the first direction X. Here, the number of scattering slots 121 is exemplified as six. The sound emitted by the speaker 11 is projected onto a first inclined surface A1, which reflects the sound. The sound emitted by the speaker 11 enters the scattering slots 121, and the inner wall of the scattering slots 121 reflects the sound, changing its phase. Scattering slots 121 at different positions can produce different phase changes to the sound. Under the combined action of the scattering surface formed by the first inclined surface A1 and the inner walls of the multiple scattering slots 121, the sound emitted by the speaker 11 can be scattered. Since the scattering slots 121 are arranged along the first direction X, and based on the base 13 supporting the speaker 11 and the scatterer 12, the first direction X can be considered approximately horizontal. Therefore, the scattering slots 121 can cause different phase changes in the sound in the horizontal direction, achieving horizontal scattering of the sound and improving the uniformity of the sound in the horizontal direction.

[0034] like Figure 3a The diagram shows a three-dimensional structural schematic of the audio module 1 from another angle. Sound emitted by the speaker 11 is projected into various scattering slots 121, which alter the phase of the sound. Further reference... Figure 3b The sound processed by the scattering groove 121 can interact with each other, producing uniformly scattered reflected sound in the horizontal direction, balancing the sound distribution in the horizontal direction, and improving the horizontal uniformity of the sound.

[0035] Specifically, such as Figure 3bThe audio module 1 is shown in a top view, that is, a view from directly above the base 13. The plurality of scattering grooves 121 includes a central scattering groove group C1 and two groups of side scattering groove groups C2. The two groups of side scattering groove groups C2 are the same and are symmetrically arranged along the first direction X on both sides of the central scattering groove group C1. Among them, the division of the central scattering groove group C1 and the side scattering groove group C2 is based on the position of the loudspeaker 11, so that the plurality of scattering grooves 121 has a left-right symmetric structure. The central scattering groove group C1 corresponds to the central position of the loudspeaker 11, and the sound emitted by the loudspeaker 11 reaches the central scattering groove group C1 with the shortest distance. It can be understood that the left-right symmetry here takes the first direction X as the reference. The center plane of the plurality of scattering grooves 121 can refer to the center of the loudspeaker 11, and the center of the loudspeaker 11 is located on the center plane. The sound emitted by the loudspeaker 11 is projected into each scattering groove 121, and is scattered out after being changed in phase by each scattering groove 121. Since the plurality of scattering grooves 121 are arranged in left-right symmetry, the scattered sound can also be in a left-right symmetric state in the horizontal plane, further improving the uniformity in the horizontal direction. That is, the sound emitted by the loudspeaker 11 forms a relatively uniform distribution in the horizontal direction after being scattered by the scattering body 12, which can improve the horizontal uniformity of the sound.

[0036] The audio module 1 provided in the embodiment has a wider directivity in the horizontal direction, and the consistency of the listening experience at different angle positions is stronger, and the high-frequency part is brighter and more transparent. Through experimental comparison, the horizontal uniformity of the sound scattered by the scattering body 12 is improved by 35.9% compared with the existing straight-out audio module, and is improved by 7.5% compared with the acoustic prism.

[0037] In the audio module 1 provided in the embodiment, the number of scattering grooves 121 on the scattering body 12 is not limited, but based on the setting of the central scattering groove group C1 and the side scattering groove groups C2 symmetrically arranged on both sides of the central scattering groove group C1, the scattering grooves 121 are at least three. When the number of scattering grooves 121 is even, the central scattering groove group C1 includes two identical scattering grooves 121, and the distance from the two scattering grooves 121 to the central position of the loudspeaker 11 is equal. When the number of scattering grooves 121 is even, the central scattering groove group C1 includes one scattering groove 121.

[0038] Exemplarily, Figure 4aThe front view of the audio module 1 shown is a view of the audio module 1 observed from a perspective parallel to the base 13 and capable of observing the scattering slots 121. The number of scattering slots 121 in the audio module 1 is six, the central scattering slot group C1 includes two identical scattering slots 121, and the distance of the two scattering slots 121 to the center of the loudspeaker 11 is equal. Any one of the side scattering slot groups C2 includes two scattering slots 121, and the scattering slots 121 in the two side scattering slot groups C2 are symmetric about the central scattering slot group C1. The two scattering slots 121 in the central scattering slot group C1 have the same distance to the center of the loudspeaker 11 and are shorter than the distance of other scattering slots 121 to the center of the loudspeaker 11. Here, the distance of the scattering slots 121 to the center of the loudspeaker 11 refers to the distance from the opening center of the scattering slots 121 on the first inclined surface A1 to the center of the loudspeaker 11.

[0039] In another embodiment, as shown in Figure 4b The front view of the audio module 1 shown is a view of the audio module 1 observed from a perspective parallel to the base 13 and capable of observing the scattering slots 121. In Figure 4b , the number of scattering slots 121 is five, the central scattering slot group C1 includes one scattering slot 121 corresponding to the center of the loudspeaker 11. Any one of the side scattering slot groups C2 includes two scattering slots 121, and the scattering slots 121 in the two side scattering slot groups C2 are symmetric about the central scattering slot group C1. The scattering slot 121 in the central scattering slot group C1 has the same distance to the center of the loudspeaker 11 and is shorter than the distance of other scattering slots 121 to the center of the loudspeaker 11. Here, the distance of the scattering slots 121 to the center of the loudspeaker 11 refers to the distance from the opening center of the scattering slots 121 on the first inclined surface A1 to the center of the loudspeaker 11.

[0040] The audio module 1 provided in the present application sets the maximum slot depth of the central scattering slot group C1 to be greater than the maximum slot depth of the side scattering slot group C2, so as to optimize the frequency response curve of the sound field and prevent obvious peaks and valleys. Specifically, the maximum slot depth of the scattering slots 121 in the central scattering slot group C1 can be less than 4.9 cm, for example, 4.5 cm, 3 cm, 2 cm, etc. The maximum slot depth of the scattering slots 121 in the side scattering slot group C2 is less than the maximum slot depth of the scattering slots 121 in the central scattering slot group C1. In combination with Figure 2c As shown in the example, the maximum slot depth of the scattering slots 121 refers to the slot depth d at the farthest distance from the first inclined surface A1 of the bottom wall 1212 of the scattering slots 121. Figure 5a and Figure 5b The top view of the scattering body 12 is shown, that is, the structure of the scattering body 12 observed from above perpendicular to the base 13. Taking an example in which the slot depth d of each scattering slot 121 is constant along the extension direction of the scattering slot 121, the scattering body 12 is exemplarily described.

[0041] Figure 5a Exemplarily, even-numbered scattering grooves 121 are taken as an example, the scattering grooves 121 in the central scattering groove group C1 have a groove depth d1, the scattering grooves 121 farthest from the central scattering groove group C1 in the side scattering groove group C2 have a groove depth d2, and the scattering grooves 121 next to the central scattering groove group C1 in the side scattering groove group C2 have a groove depth d3. The groove depth of the scattering grooves 121 in the central scattering groove group C1 is the largest, that is, the groove depth d1 is greater than the groove depth d2, and the groove depth d1 is greater than the groove depth d3. Exemplarily, the groove depth d3 of the scattering grooves 121 next to the central scattering groove group C1 in the side scattering groove group C2 is less than the groove depth d2 of the scattering grooves 121 farthest from the central scattering groove group C1, that is, d2 is greater than d3.

[0042] Figure 5b Exemplarily, odd-numbered scattering grooves 121 are taken as an example. The scattering grooves 121 in the central scattering groove group C1 have a groove depth d1, the scattering grooves 121 farthest from the central scattering groove group C1 in the side scattering groove group C2 have a groove depth d2, and the scattering grooves 121 next to the central scattering groove group C1 in the side scattering groove group C2 have a groove depth d3. The groove depth of the scattering grooves 121 in the central scattering groove group C1 is the largest, that is, the groove depth d1 is greater than the groove depth d2, and the groove depth d1 is greater than the groove depth d3. Exemplarily, the groove depth d3 of the scattering grooves 121 next to the central scattering groove group C1 in the side scattering groove group C2 is less than the groove depth d2 of the scattering grooves 121 farthest from the central scattering groove group C1, that is, d2 is greater than d3.

[0043] Based on the above Figure 5a and Figure 5b The audio module 1 shown in the figure, the groove depth d of the scattering grooves 121 in the central scattering groove group C1 is greater than the groove depth d of the scattering grooves 121 in the side scattering groove group C2, and the frequency response of the diffused sound field can be optimized after the sound emitted by the loudspeaker 11 is scattered by the scattering body 12. Figure 6 The relationship curve between the frequency and the sound pressure level of the sound scattered by the scattering body 12 is shown in the figure, the frequency response of the sound changes relatively gently, there is no obvious peak and valley, which corresponds to weakening the strength change of the sound, and the user's use experience can be improved.

[0044] It should be understood that the groove depth d of the scattering grooves 121 determines the lower limit of the frequency of the sound emitted by the loudspeaker 11, that is, the groove depth d of the scattering grooves 121 is related to the minimum frequency of the sound.

[0045] As Figure 7aAs shown in the front view of the audio module 1, the total slot width W of the plurality of scattering slots 121 ranges from about 3.5 cm to 12 cm. The total slot width W is equivalent to the sum of the slot width w1 of the plurality of scattering slots 121 and the partition thickness w2 between any two adjacent scattering slots 121. It can also be considered that the total slot width W refers to the distance between one end of the group of side scattering slot groups C2 away from the center scattering slot group C1 and the other end of the group of side scattering slot groups C2 away from the center scattering slot group C1.

[0046] In the above formula, the slot width w1 of each scattering slot 121 can be equal or unequal. The specific implementation can be set according to the specific manufacturing process and application scenario, which is not limited here.

[0047] When the slot width w1 of each scattering slot 121 is equal, for any one scattering slot 121, the slot width w1 of the scattering slot 121 is related to the upper limit of the frequency band of the sound. In the audio module 1 provided by the embodiment of the present application, the slot width of each scattering slot 121 satisfies the following condition: w1=c air / (2×f max ); In the above formula, w1 is the slot width of the scattering slot 121, c air is the speed of sound, and f max is the maximum frequency of the acting frequency band of the loudspeaker 11. The greater the maximum frequency of the acting frequency band of the loudspeaker 11, the smaller the slot width of the scattering slot 121.

[0048] The audio module 1 is cut along a plane perpendicular to the second direction Y and the third direction Z to obtain a Figure 7b schematic view of the cross-sectional structure. In the Figure 7b , here, the slot length H of the scattering slot 121 in the center scattering slot group C1 is greater than 2 cm, and based on the structure of the scattering body 12, the slot length H of each scattering slot 121 is different. Figure 7b In the above formula, the sound emitting surface B of the loudspeaker 11 is parallel to the upper surface of the base 13, and the included angle between the normal direction of the sound emitting surface B and the first inclined surface A1 is β, and β ranges from 30° to 70°.

[0049] It should be understood that the number of scattering slots 121 can also be four, seven, nine, twelve or even more, which can be set according to actual needs. The more the scattering slots 121, the better the diffusion effect of the scattering body 12 on the sound in the horizontal direction. For any one group of side scattering slot groups C2, the slot depth d of the scattering slot 121 in the side scattering slot group C2 is not limited, and the distribution of the slot depth d is also not limited by the arrangement rule, as long as the slot depth d of the scattering slot 121 in the side scattering slot group C2 is less than the slot depth d of the scattering slot 121 in the center scattering slot group C1. The shape of the scattering body 12 in the audio module 1 provided by the embodiment of the present application can also have other implementation manners. For example,Figure 8a The main view of the scatterer 12 is shown. The structure of the scatterer 12 is similar to that shown in Figure 3b The structure of the scatterer 12 is similar to that shown in Figure 8b The main view of the scatterer 12 is shown. Figure 8a The cross-sectional view of the scatterer 12 is shown after cutting along the plane where P-P is located. The first inclined surface A1 of the scatterer 12 is almost a plane. Figure 3b Compared with the scatterer 12 shown in Figure 8a The scatterer 12 shown has a larger size in the direction of the groove depth d of the scattering groove 121.

[0050] The main view of the scatterer 12 is shown. The structure of the scatterer 12 is a polygonal solid structure. The scatterer 12 only shows the first inclined surface A1. Figure 9a The main view of the scatterer 12 is shown. Figure 9b The cross-sectional view of the scatterer 12 is shown after cutting along the plane where Q-Q is located. The first inclined surface A1 of the scatterer 12 is almost a plane. In the direction perpendicular to the base 13, the scatterer 12 is a quadrilateral, and the corner is smoothly chamfered. Figure 9a The main view of the scatterer 12 is shown. The structure of the scatterer 12 is a drum shape. In the direction perpendicular to the base 13, the top size and the bottom size of the scatterer 12 are both smaller than the waist size.

[0051] The cross-sectional view of the scatterer 12 is shown after cutting along the plane where R-R is located. The first inclined surface A1 of the scatterer 12 is a curved surface. In the direction perpendicular to the base 13, the scatterer 12 is a circle. Figure 10a Figure 10b The cross-sectional view of the scatterer 12 is shown after cutting along the plane where R-R is located. The first inclined surface A1 of the scatterer 12 is a curved surface. In the direction perpendicular to the base 13, the scatterer 12 is a circle. Figure 10a The cross-sectional view of the scatterer 12 is shown after cutting along the plane where R-R is located. The first inclined surface A1 of the scatterer 12 is a curved surface. In the direction perpendicular to the base 13, the scatterer 12 is a circle. The cross-sectional view of the scatterer 12 is shown after cutting along the plane where R-R is located. The first inclined surface A1 of the scatterer 12 is a curved surface. In the direction perpendicular to the base 13, the scatterer 12 is a circle.

[0052] The cross-sectional view of the scatterer 12 is shown after cutting along the plane where R-R is located. The first inclined surface A1 of the scatterer 12 is a curved surface. In the direction perpendicular to the base 13, the scatterer 12 is a circle. Figure 8b The cross-sectional view of the scatterer 12 is shown after cutting along the plane where R-R is located. The first inclined surface A1 of the scatterer 12 is a curved surface. In the direction perpendicular to the base 13, the scatterer 12 is a circle. Figure 9b The cross-sectional view of the scatterer 12 is shown after cutting along the plane where R-R is located. The first inclined surface A1 of the scatterer 12 is a curved surface. In the direction perpendicular to the base 13, the scatterer 12 is a circle. Figure 10b The cross-sectional view of the scatterer 12 is shown after cutting along the plane where R-R is located. The first inclined surface A1 of the scatterer 12 is a curved surface. In the direction perpendicular to the base 13, the scatterer 12 is a circle. Figure 11a to Figure 11d The cross-sectional view of the scatterer 12 is shown after cutting along the plane where R-R is located. The first inclined surface A1 of the scatterer 12 is a curved surface. In the direction perpendicular to the base 13, the scatterer 12 is a circle. Figure 11a The cross-sectional view of the scatterer 12 is shown after cutting along the plane where R-R is located. The first inclined surface A1 of the scatterer 12 is a curved surface. In the direction perpendicular to the base 13, the scatterer 12 is a circle. Figure 11b The cross-sectional view of the scatterer 12 is shown after cutting along the plane where R-R is located. The first inclined surface A1 of the scatterer 12 is a curved surface. In the direction perpendicular to the base 13, the scatterer 12 is a circle. Figure 11c The cross-sectional view of the scatterer 12 is shown after cutting along the plane where R-R is located. The first inclined surface A1 of the scatterer 12 is a curved surface. In the direction perpendicular to the base 13, the scatterer 12 is a circle. Figure 11dThe bottom wall 1212 and the side wall 1211 of the scattering groove 121 shown form an angle θ, which is greater than 90°. This makes the width of the bottom wall 1212 smaller than the width of the opening of the scattering groove 121 on the first inclined surface A1. When manufacturing the scattering body 12, this shape of the scattering groove 121 is beneficial for the drafting operation.

[0053] It should be understood that the sound processing by the scattering groove 121 is to change the phase of the sound. Changing the shape of the scattering groove 121 can correspondingly change the effect of changing the sound phase. In addition, changing the shape of the scattering groove 121 will require corresponding adjustments to the groove length H, groove width w1, and groove depth d to meet the usage requirements.

[0054] In some embodiments, such as Figure 12 The diagram shows a three-dimensional structure of another audio module 1. The depth d of the scattering groove 121 in the scatterer 12 gradually increases along the direction away from the speaker 11. The scatterer 12 in this audio module 1 is... Figure 9a The scatterer 12 shown in the example.

[0055] Combination Figure 12 , refer to Figure 13a Shown Figure 12 The enlarged view of section C shows one of the scattering grooves 121 as an example. This scattering groove 121 has a bottom wall 1212 and two side walls 1211. Due to viewing angle limitations, only one of the side walls 1211 is shown. The bottom wall 1212 is indicated by a diagonal shading, and the side wall 1211 is indicated by dotted shading. The side of the side wall 1211 that contacts the bottom wall 1212 is the first side wall m, and the side of the side wall 1212 located on the first inclined surface A1 is the second side wall n. The distance from the second side wall n to the first side wall m can be considered as the groove depth d of the scattering groove 121, which is also the distance from the first inclined surface A1 to the bottom wall 1212.

[0056] The first side m can be a curve or a straight line, and the second side n can also be a curve or a straight line; there is no limitation. Here, for example, both the first side m and the second side n are straight lines. When both the first side m and the second side n are straight lines, the angle between them is less than 60°. When the angle between them is 0°, they are parallel, and the depth d of the scattering groove 121 remains consistent at different positions. When the angle between them is greater than 0°, the depth d of the scattering groove 121 changes linearly. Figure 13a In the middle, the first side m and the second side n are not parallel, and there is an angle γ between them.

[0057] Continue to refer to Figure 13bThe first side m and the second side n of the simplified schematic diagram of the example have an included angle γ between them, and the range of the included angle γ is less than 60°. The distance between the second side n and the first side m is the groove depth d of the scattering groove 121. In the direction away from the loudspeaker 11, the distance between the second side n and the first side m gradually increases, that is, the groove depth d of the scattering groove 121 gradually increases. The sound emitted by the loudspeaker 11 undergoes a phase change in the scattering groove 121 and then reflects a plurality of phase sounds. The change in the groove depth d of the scattering groove 121 can provide more possibilities for the phase change of the sound, that is, the reflected sound can have more rich phase changes, thereby having more change possibilities.

[0058] For the entire scattering body 12, the included angle γ between the first side m and the second side n of the side wall 1211 in each scattering groove 121 can be the same or different, which is not limited here. When the included angles between the first side m and the second side n of the different scattering grooves 121 are equal in size, the different scattering grooves 121 have a more orderly appearance.

[0059] Of course, the groove depth d of the scattering groove 121 can not be linearly changed, that is, the first side m and the second side n can not simply form an included angle relationship. On the basis of ensuring the horizontal scattering of sound, more rich phase changes of sound can be brought to improve the auditory experience.

[0060] In another embodiment, as Figure 14 shown, the first side m of the side wall 1211 can be a straight line, and the second side n can be a curved line. The scattering body 12 with the scattering groove 121 having such a structure has a first inclined surface A1, which is a surface where the second side n is located. Therefore, the first inclined surface A1 can also be a curved surface.

[0061] In the above embodiment, the sound emitting surface B of the loudspeaker 11 is parallel to the base 13. In specific applications, the base 13 can be arranged on different bearing surfaces as needed. When the bearing surface is parallel to the horizontal direction, the sound emitting surface B of the loudspeaker 11 is parallel to the horizontal surface. When the bearing surface has a certain included angle with the horizontal surface, the sound emitting surface B of the loudspeaker 11 has a certain included angle with the horizontal surface. The range of the included angle is 0-60°.

[0062] In some embodiments, as Figure 15 shown, the sound emitting surface B of the loudspeaker 11 is arranged obliquely relative to the base 13. Specifically, with the upper surface G of the base 13 as a reference, the base 11 and the sound emitting surface B of the loudspeaker B have an included angle , and the range of the included angle is 0-60°. When the base 13 is arranged on the horizontal surface, the sound emitting surface B of the loudspeaker 11 is equivalent to having an included angle It should be understood that the angle β between the normal direction of the sound emitting surface B of the loudspeaker 11 and the sound emitting surface B of the diffuser 12 ranges from 30° to 70°, regardless of the angle α between the upper surface G of the base 13 and the sound emitting surface B of the loudspeaker B. It should be understood that the angle β between the normal direction of the sound emitting surface B of the loudspeaker 11 and the sound emitting surface B of the diffuser 12 ranges from 30° to 70°, regardless of the angle α between the upper surface G of the base 13 and the sound emitting surface B of the loudspeaker B.

[0063] The audio module 1 provided by the embodiments has high horizontal uniformity, and the listening experience can be approximately consistent at different positions in the horizontal direction. In addition, the audio module 1 can weaken the peak-valley phenomenon of sound in the high-frequency range, and improve the listening experience of users.

[0064] Since the audio module 1 has good uniformity in the horizontal direction, the audio module 1 can be applied to midrange, mid-high and high acoustic units, and the negative effects caused by the short wavelength and strong directivity of mid-high sound can be weakened to provide good listening experience.

[0065] Regarding the application scenarios, the audio module 1 can be applied to occasions with high requirements for sound horizontal uniformity, such as indoor, vehicle cabin and the like. Based on this, the embodiments also provide a vehicle 10, which can include a vehicle body 2 and an audio module 1 arranged in the vehicle cabin of the vehicle body 2. For example, as shown in FIG. 1, the audio module 1 can be arranged in the middle of the automobile control panel 21 in the vehicle cabin. Figure 16a As shown in FIG. 2, the audio module 1 can be arranged in the corner of the connection between the A-pillar 23 and the windshield 22. Figure 16b

[0066] For listening experience, the sound in the height direction does not differ much when the passenger is at different positions in the vehicle cabin, but the difference in the horizontal direction can be large. The audio module 1 has good horizontal uniformity, can uniformly scatter sound to different positions in the horizontal direction, and makes the listening experience of passengers at different positions approximately consistent. In addition, the audio module 1 can weaken the peak-valley phenomenon of sound in the high-frequency range, optimize the sound frequency response, and further improve the listening experience of users.

[0067] In particular, when the audio module 1 is a high-frequency module, the diffuser 12 scatters the sound emitted by the loudspeaker 11, weakens the negative effects caused by the short wavelength and strong directivity of high-frequency sound, and the high-frequency sound field in the horizontal direction of the vehicle cabin is more uniform. The vehicle 10 provided with the high-frequency module has brighter and more transparent sound field listening experience in the vehicle cabin, and can improve the user experience.

[0068] ​It should be understood that when the audio module 1 is applied to the vehicle 10, the structure and shape of the audio module 1 can be further personalized to match the brand style of different cars. For example, the support structure of the liftable and rotatable audio module 1 is matched, the display table that can display the audio module 1 is set, and the audio module 1 is given a more dynamic and more ornamental cool appearance, which will not be illustrated here.

[0069] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An audio module, characterized by, The application relates to a loudspeaker device, comprising: a base, a loudspeaker and a diffuser, the loudspeaker and the diffuser being fixed to the base; the diffuser is arranged on the sound emitting side of the loudspeaker; the diffuser has a first inclined surface facing the loudspeaker; wherein the first inclined surface is a plane, and the diffuser further comprises a curved surface away from the first inclined surface; or the first inclined surface is a plane, and the diffuser further comprises a plane away from the first inclined surface; the diffuser is provided with a plurality of scattering grooves with openings on the first inclined surface, the plurality of scattering grooves comprise: a central scattering groove group arranged at a position corresponding to the center position of the loudspeaker; and two groups of side scattering groove groups symmetrically arranged on the two sides of the central scattering groove group.

2. The audio module of claim 1, wherein, The maximum groove depth of the scattering grooves in the central scattering groove group is greater than the maximum groove depth of the scattering grooves in the side scattering groove group.

3. The audio module of claim 1, wherein the first and second audio components are configured to be mounted on a printed circuit board (PCB) of the electronic device. The side scattering groove group comprises a first scattering groove adjacent to the central scattering groove group and a second scattering groove farthest from the central scattering groove group, and the groove depth of the first scattering groove is smaller than the groove depth of the second scattering groove.

4. The audio module of claim 1, wherein the first and second audio components are configured to be mounted on a printed circuit board (PCB) of the electronic device. The scattering grooves are even in number, the central scattering groove group comprises two identical scattering grooves, and the two scattering grooves in the central scattering groove group are equal in distance to the center position of the loudspeaker. The distance of the scattering groove to the center position of the loudspeaker refers to the distance from the opening center of the scattering groove on the first inclined surface to the center position of the loudspeaker.

5. The audio module of claim 1, wherein the first and second audio components are configured to be mounted on a printed circuit board (PCB) of the electronic device. The scattering grooves are odd in number, the central scattering groove group comprises one scattering groove, and the central scattering groove group comprises one scattering groove with a center position corresponding to the center position of the loudspeaker.

6. The audio module of claim 1, wherein the first and second audio components are configured to be mounted on a printed circuit board (PCB) of the electronic device. The scattering groove comprises a bottom wall, and the angle between the bottom wall and the first inclined surface is a first included angle.

7. The audio module of any one of claims 1 to 6, wherein, The groove depth of the scattering groove increases in the direction away from the loudspeaker, and the groove depth refers to the distance from the bottom wall to the first inclined surface.

8. The audio module of any one of claims 1 to 6, wherein, The angle between the bottom wall and the first inclined surface in each scattering groove is equal.

9. The audio module of any one of claims 1 to 6, wherein, The first included angle is greater than 0 degree, or the first included angle is less than 60 degrees, or the first included angle is equal to 0 degree.

10. The audio module of any one of claims 1 to 6, wherein, The maximum groove depth of the scattering grooves in the central scattering groove group is less than 4.9 cm.

11. The audio module of any one of claims 1 to 6, wherein, The groove width of each scattering groove is equal.

12. The audio module of any one of claims 1 to 6, wherein, The scattering groove comprises a side wall, and the included angle between the bottom wall and the side wall of the scattering groove is greater than 90 degrees, or the width of the bottom wall is less than the width of the opening of the scattering groove on the first inclined surface.

13. The audio module of any one of claims 1 to 6, wherein, The groove width of each scattering groove is negatively correlated with the maximum frequency of the action frequency band of the loudspeaker.

14. The audio module of any one of claims 1 to 6, wherein, The distance between one end of one group of side scattering groove groups away from the central scattering groove group and one end of another group of side scattering groove groups away from the central scattering groove group is 3.5-10 cm.

15. The audio module of any one of claims 1 to 6, wherein, The groove length of each scattering groove is greater than 2 cm in the extension direction of the scattering groove.

16. The audio module of any one of claims 1 to 6, wherein, The first inclined surface is a plane or a curved surface.

17. The audio module of any one of claims 1 to 6, wherein, The included angle between the first inclined surface and the normal line of the sound emitting surface of the loudspeaker is 30-70 degrees.

18. The audio module of any one of claims 1 to 6, wherein, The included angle between the sound emitting surface of the loudspeaker and the base is 0-60 degrees.

19. A vehicle characterized by comprising: The vehicle body and the audio module as claimed in any one of claims 1 to 18 are included; the audio module is arranged on the vehicle body.

20. The vehicle of claim 19, wherein, The audio module is arranged at a center position of an automobile instrument panel of the vehicle body; or, the audio module is arranged at a corner of a connection between an A-pillar and a windshield of the vehicle body.

21. The vehicle of claim 19 or 20, wherein, The audio module further comprises a support structure for lifting or rotating the audio module.

22. A scatterer, characterized in that, The scattering body has a first inclined surface facing the loudspeaker; wherein the first inclined surface is a plane, and the scattering body further comprises a curved surface away from the first inclined surface; The scattering body is provided with a plurality of scattering grooves with openings on the first inclined surface, The plurality of scattering grooves comprises: a central scattering groove group arranged at a position corresponding to a central position of the loudspeaker; and two groups of side scattering groove groups symmetrically arranged on both sides of the central scattering groove group.

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