Audio modules and vehicles

Abstract

The present application relates to the field of terminal technology, and in particular to an audio module and a vehicle. The audio module includes a base, a speaker, and a scatterer; the speaker and the scatterer are both fixed to the base, the scatterer is arranged on the sound-emitting side of the speaker, and the scatterer has a first inclined surface inclined toward the speaker; along the first direction, the scatterer is provided with a plurality of scattering slots with openings located on the first inclined surface, the extension direction of each scattering slot is perpendicular to the first direction, and the first direction is parallel to the base; the plurality of scattering slots include a central scattering slot group and two groups of side scattering slot groups, the two groups of side scattering slot groups are identical and symmetrically arranged on both sides of the central scattering slot group along the first direction. The central scattering slot group corresponds to the center position of the speaker, so that the sound has better uniformity in the horizontal direction; the maximum slot depth of the scattering slots in the central scattering slot group is greater than the maximum slot depth of the scattering slots in the side scattering slot group, which can weaken the peak and valley phenomenon in the sound field frequency response of the sound and improve the listening experience.

Description

Technical Field

[0001] The present application relates to the field of terminal technology, and in particular to an audio module and a vehicle. Background Art

[0002] With the rapid development of automotive intelligence, automobile manufacturers will enhance the auditory experience by installing audio modules in the vehicle cabin.

[0003] Currently, audio modules are installed in the control panel of a car's cabin or in the corner where the A-pillar meets the windshield. When listening to the audio module from different locations in the cabin, the sound level is not much different in the vertical direction, but there is a large difference in the horizontal direction. When the sound level of the audio device is not uniform, the listening experience is inconsistent at different locations in the vehicle cabin, affecting the user experience. Summary of the Invention

[0004] This application provides an audio module and vehicle that can optimize the horizontal uniformity of sound and enhance the user's listening experience.

[0005] In the first aspect, the present application provides an audio module and a vehicle, which can be applied to occasions such as vehicles that have high requirements for sound level uniformity. The audio module includes a base, a speaker and a scatterer, the speaker and the scatterer are installed on the base, and the base can provide support for the speaker and the scatterer. The speaker can emit sound, and the scatterer is arranged on the sound-emitting side of the speaker to scatter the sound emitted by the speaker. Specifically, the scatterer has a first inclined surface inclined toward the speaker, and the angle between the first inclined surface and the sound-emitting surface of the speaker should be an acute angle, so that the sound emitted by the speaker can be projected onto the first inclined surface. Along the first direction, the scatterer is provided with a plurality of scattering slots with openings located on the first inclined surface, and the extension direction of each scattering slot is perpendicular to the first direction, and the first direction is parallel to the base. Wherein, the first inclined surface and each scattering slot can reflect the incident sound, so that the first inclined surface and the inner wall of each scattering slot can form a scattering surface to reflect the sound. The sound reflected by the scattering surface will change in phase. When the sounds reflected by different scattering slots meet, the phases will be superimposed or attenuated, thereby changing the distribution of the sound in the horizontal direction to achieve a scattering effect and improve the uniformity of the sound in the horizontal direction. Among them, the multiple scattering slots include a central scattering slot group and two groups of side scattering slot groups. The two groups of side scattering slot groups are identical and symmetrically arranged on both sides of the central scattering slot group. The central scattering slot group corresponds to the center position of the speaker. The scattering slots are arranged to have a left-right symmetrical structure along 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 slot depth of the scattering slots in the central scattering slot group is greater than the maximum slot depth of the scattering slots in the side scattering slot group. Such a structural setting can weaken the peak and valley phenomenon in the sound field frequency response of the sound and enhance the listening experience.

[0006] The number of scattering slots can be even or odd. When the number of scattering slots is even, the central scattering slot group includes two identical scattering slots, both equidistant from the center of the speaker. When the number of scattering slots is odd, the central scattering slot group includes a single scattering slot, the center of which corresponds to the center of the speaker. The greater the number of scattering slots, the greater the horizontal diffusion efficiency of the scatterer.

[0007] The depth of the scattering slots determines the lower limit of the sound frequency emitted by the speaker, that is, the depth of the scattering slots is related to the minimum frequency of the sound. Specifically, the maximum depth of the scattering slots in the central scattering slot group is less than 4.9 cm.

[0008] The inner wall of the scattering slot includes a bottom wall and two side walls, the two side walls being located on either side of the bottom wall in a first direction. The side wall has a first side edge that abuts the bottom wall and a second side edge located on a first inclined surface. It should be understood that the first side edge may be a curved or straight line, and the second side edge may also be a curved or straight line.

[0009] In some possible implementations, the first side and the second side are both straight lines, and the first side and the second side are inclined at an angle. When the 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 depth of the scattering groove remains consistent at different positions. When the angle between the first side and the second side is greater than 0°, the groove depth of the scattering groove changes linearly. Possibly, the angle between the first side and the second side is less than 60°.

[0010] Possibly, the included angles between the first side and the second side of each scattering slot are equal in size, so that different scattering slots have a more neat appearance.

[0011] Of course, the depth of the scattering groove may not change linearly, that is, the second side and the first side may not simply form an angle relationship. On the basis of ensuring the horizontal scattering of sound, it can bring richer phase changes to the sound and enhance the listening experience.

[0012] In some possible implementations, the connection between the bottom wall and the side wall of the scattering slot may be a bend. Possibly, a chamfer may be provided at the connection between the bottom wall and the side wall to make a smooth transition between the bottom wall and the side wall.

[0013] The width of the scattering slots determines the upper limit of the sound frequency, while the depth of the scattering slots is related to the minimum sound frequency. Along a first direction, the distance between one end of one side scattering slot group, distal to the central scattering slot group, and another end of another side scattering slot group, distal to the central scattering slot group, is 3.5-10 cm. The widths of the scattering slots can be equal or unequal. The length of each scattering slot is greater than 2 cm, and the length of the scattering slot refers to the length of the bottom wall of the scattering slot along the direction in which the scattering slot extends.

[0014] Along the first direction, when the slot widths of each scattering slot are equal, the slot widths of each scattering slot may satisfy the following conditions:

[0015] w1=c air / (2×f max );

[0016] Where w1 is the width of the scattering slot, c air is the speed of sound, f max The maximum frequency of the speaker's operating frequency band.

[0017] In some possible implementations, the angle between the first inclined surface and the normal to the speaker's sound-emitting surface is 30-70 degrees. With this angle setting, the sound emitted by the speaker, after being reflected by the first inclined surface, has a narrow distribution perpendicular to the base, allowing the sound to be concentrated within the user's listening height range.

[0018] The first inclined surface may be a plane or a curved surface, which is not limited here, as long as it can meet the sound scattering requirements.

[0019] In some possible implementations, the angle between the speaker's sound-emitting surface and the base is 0-60°, providing a wider range of sound propagation directions. It should be understood that regardless of the angle between the speaker's sound-emitting surface and the base, the angle between the first inclined surface and the speaker's sound-emitting surface must meet the requirements of the above-described technical solution.

[0020] In a second aspect, the present application provides a vehicle comprising a vehicle body and any one of the audio modules of the above technical solutions. The audio module is arranged on the vehicle body and can provide a better sound experience for passengers riding in the vehicle.

[0021] Specifically, the audio module is arranged at the center of the vehicle dashboard of the vehicle body; or, the audio module is arranged at the corner where the A-pillar and the windshield of the vehicle body are connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a curve showing the relationship between the frequency and sound pressure level of diffused sound in the prior art;

[0023] Figure 2a A schematic diagram of the structure of an audio module provided in an embodiment of the present application;

[0024] Figure 2b A schematic diagram of the specific structure of an audio module provided in an embodiment of the present application;

[0025] Figure 2c A schematic diagram of a partial structure of an audio module provided in an embodiment of the present application;

[0026] Figure 3a A schematic diagram of the sound generation of a speaker unit of an audio module provided in an embodiment of the present application;

[0027] Figure 3b A schematic diagram of horizontal diffusion of a scatterer of an audio module provided in an embodiment of the present application;

[0028] Figure 4a A schematic diagram of a scatterer with an even number of scattering slots provided in an embodiment of the present application;

[0029] Figure 4b A schematic diagram of a scatterer with an odd number of scattering slots provided in an embodiment of the present application;

[0030] Figure 5a A schematic diagram of the groove depth distribution of a scattering groove in an audio module provided in an embodiment of the present application;

[0031] Figure 5b A schematic diagram of the groove depth distribution of a scattering groove in an audio module provided in an embodiment of the present application;

[0032] Figure 6 A curve showing the relationship between the frequency and sound pressure level of sound of an audio module provided in an embodiment of the present application;

[0033] Figure 7a A schematic diagram of the structure of an audio module provided in an embodiment of the present application;

[0034] Figure 7b A schematic cross-sectional view of an audio module according to an embodiment of the present invention;

[0035] Figure 8a A schematic diagram of the structure of a scatterer in an audio module provided in an embodiment of the present application;

[0036] Figure 8b for Figure 8a Schematic diagram of the cross-sectional structure at the middle PP;

[0037] Figure 9a A schematic diagram of the structure of a scatterer in an audio module provided in an embodiment of the present application;

[0038] Figure 9b for Figure 9a Schematic diagram of the cross-section structure at QQ in the middle;

[0039] Figure 10a A schematic diagram of the structure of a scatterer in an audio module provided in an embodiment of the present application;

[0040] Figure 10b for Figure 10a Schematic diagram of the cross-section structure at the middle RR;

[0041] Figure 11a A schematic diagram of the structure of a scattering slot in an audio module provided in an embodiment of the present application;

[0042] Figure 11b A schematic diagram of the structure of a scattering slot in an audio module provided in an embodiment of the present application;

[0043] Figure 11c A schematic diagram of the structure of a scattering slot in an audio module provided in an embodiment of the present application;

[0044] Figure 11d A schematic diagram of the structure of a scattering slot in an audio module provided in an embodiment of the present application;

[0045] Figure 12 A schematic diagram of the structure of an audio module provided in an embodiment of the present application;

[0046] Figure 13a for Figure 12 Enlarged view of middle C part;

[0047] Figure 13b A schematic structural diagram of a first side and a second side of a scattering slot in an audio module provided in an embodiment of the present application;

[0048] Figure 14 A schematic structural diagram of a first side and a second side of a scattering slot in an audio module provided in an embodiment of the present application;

[0049] Figure 15 A schematic cross-sectional view of an audio module according to an embodiment of the present invention;

[0050] Figure 16a A schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0051] Figure 16b A schematic structural diagram of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] With the development of intelligent technology, automakers are installing audio modules in vehicle cabins to enhance the listening experience. Currently, the sound level uniformity of these modules is low, resulting in different hearing experiences for passengers at different locations in the vehicle cabin. To improve this level uniformity, the sound produced by the audio module can be diffused. Figure 1 This figure shows the relationship between the frequency and sound pressure level (SPL) of diffused sound in the prior art. This curve can be called a diffuse sound field frequency response curve. The horizontal axis represents the frequency of the sound in Hertz (Hz), and the vertical axis represents the sound pressure level in dB. The dotted box shows obvious peaks and valleys in the high-frequency band, indicating that the sound intensity varies significantly here, affecting the user experience.

[0053] Based on this, the embodiments of the present application provide an audio module, an electronic device and a vehicle, wherein the audio module can improve the horizontal uniformity of treble sounds and enhance the listening experience.

[0054] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the", and "this" are intended to also include expressions such as "one or more", unless the context clearly indicates otherwise.

[0055] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0056] like Figure 2a As shown, an audio module 1 that can be applied to a vehicle is provided in an embodiment of the present application. Figure 2aThe left side view of the simplified structural diagram of the audio module 1 is shown. When the audio module 1 is installed in the vehicle's cabin, the audio module 1 has a high uniformity in the horizontal direction, so that any position in the cabin can have approximately the same sound, and passengers in any position in the cabin will have approximately the same hearing sense, thereby obtaining a better auditory experience. Specifically, the audio module 1 includes a speaker 11, a scatterer 12 and a base 13, and the speaker 11 and the scatterer 12 are both arranged on the base 13. Among them, the speaker 11 is used to convert electrical energy into sound energy and emit sound.

[0057] Among them, as a mechanical wave, sound has a phase, and sound can also be called a sound wave. Based on the phase characteristics of sound waves, sound waves of different phases may overlap or cancel each other when they meet. The superposition of sound waves can enhance the sound, while the cancellation of sound waves will weaken the sound. The scatterer 12 in the embodiment of the present application is used to reflect the incident sound waves. The sound waves incident on different positions of the scatterer 12 produce reflections at different angles. The reflected sound waves overlap or cancel each other when they meet, thereby changing the phase of the sound waves. The sound reflected by the scatterer 12 is more uniform in different directions. When the audio module 1 is a tweeter module, the sound emitted by the speaker 11 includes high-frequency sound. High-frequency sound has the characteristics of short wavelength and strong directivity. The scatterer 12 is arranged on the sound output side of the speaker 11 and is used to scatter the sound emitted by the speaker 11 to improve the uniformity of the sound in the horizontal direction.

[0058] Continue to refer to Figure 2a If the speaker 11 has a theoretical sound-emitting surface B, the sound-emitting surface B of the speaker 11 can be parallel to the base 13. In this exemplary embodiment, the sound-emitting surface B of the speaker 11 is flush with the upper surface of the base 13. The sound emitted by the speaker 11 is a beam of strongly directional sound waves, which are perpendicular to a surface, which can be exemplified as Figure 2a Therefore, it can be considered that the sound emitted by the speaker 11 is emitted from the sound emission surface B.

[0059] The diffuser 12 is fixed to the base 13 and located on the sound-emitting side of the speaker 11. The diffuser 12 has a first inclined surface A1 that is inclined toward the speaker 11. The diffuser 12 also has a bottom surface A3 that contacts the base 13 and a top surface A2 that is away from the base 13. The first inclined surface A1 forms an acute angle α with the sound-emitting surface B of the speaker 11.

[0060] like Figure 2bThe three-dimensional structure diagram of an audio module 1 is shown. 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 the base 13 as a reference. The plane formed by the first and second directions X and Y is parallel to the base 13 and the sound output surface B of the speaker 11. The third direction Z is perpendicular to the first and second directions X and Y, and is also perpendicular to the base 13 and the sound output surface B of the speaker 11. To scatter the sound emitted by the speaker 11, the scatterer 12 is provided with a plurality of scattering slots 121, each opening on the first inclined surface A1. Each scattering slot 121 opens on the first inclined surface A1, and its two ends along the length direction of each scattering slot 121 correspond to the top surface A2 and the bottom surface A3 of the scatterer 121, respectively. The bottom surface A3 contacts the base 13, so that the end of the scattering slot 121 away from the top surface A2 is located on the base 13. Here, the first inclined surface A1 is inclined toward the base 13, and the plurality of scattering slots 121 are arranged along the first direction X.

[0061] It should be understood that the top end face A2 and the bottom end face A3 of the scatterer 12 are only for Figure 2b The structural description of the scatterer 12 in the shape shown, and the top end surface A2 and the bottom end surface A3 only illustrate the relative positions of the two surfaces, and do not limit the features such as the shapes of the surfaces.

[0062] Combine Figure 2a to Figure 2b As shown, the sound emitted by the speaker 11 can be projected onto the scatterer 12. The first inclined surface A1 of the scatterer 12 and the inner walls of the plurality of scattering slots 121 can form a sound scattering surface to reflect the sound. Figure 2c In the example structure of one of the scattering slots 121, 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 is composed of a first inclined surface A1 and the bottom wall 1212 and two side walls 1211 of each scattering slot 121. Along the extension direction of the scattering slot 121, the two ends of the scattering slot 121 are respectively located on the top end surface A2 and the bottom end surface A3 of the scatterer 12. The length of the bottom wall 1212 along the extension 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. The schematic direction of the groove depth d is perpendicular to the bottom wall 1212. For a scattering groove 121, the groove depth d may vary along the extension direction of the scattering groove 121. Figure 2c In the scattering slot 121 shown, the slot depth d remains constant along the extending direction of the scattering slot 121 .

[0063] Combine Figures 2a to 2c As shown, multiple scattering slots 121 are arranged along a first direction X, which is parallel to the base 13. Each scattering slot 121 extends 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 the first inclined surface A1, which can reflect the sound. The sound emitted by the speaker 11 enters the scattering slots 121, where the inner walls of the scattering slots 121 can reflect the sound, changing its phase. Scattering slots 121 in different locations can produce different phase changes in the sound. The first inclined surface A1 and the scattering surface formed by the inner walls of the multiple scattering slots 121 can scatter the sound emitted by the speaker 11. Since the scattering slots 121 are arranged along the first direction X, and since the base 13 is used to support the speaker 11 and the scatterer 12, the first direction X can be considered to be approximately horizontal. The scattering slots 121 can cause the sound to undergo different phase changes in the horizontal direction, achieving horizontal scattering of the sound and improving the uniformity of the sound in the horizontal direction.

[0064] like Figure 3a The three-dimensional structure diagram of the audio module 1 from another angle is shown. The sound emitted by the speaker 11 is projected into each scattering slot 121, and the scattering slot 121 changes the phase of the sound. Figure 3b The sounds processed by the scattering slots 121 can interact with each other to produce evenly scattered reflected sounds in the horizontal direction, balance the sound distribution in the horizontal direction, and improve the horizontal uniformity of the sound.

[0065] Specifically, if Figure 3bThe top view of the audio module 1 shown is a view of the audio module 1 viewed from directly above the base 13. The multiple scattering slots 121 include a central scattering slot group C1 and two groups of side scattering slot groups C2. The two groups of side scattering slot groups C2 are identical, and the two groups of side scattering slot groups C2 are symmetrically arranged on both sides of the central scattering slot group C1 along the first direction X. The division of the central scattering slot group C1 and the side scattering slot group C2 is based on the position relative to the speaker 11, so that the multiple scattering slots 121 have a left-right symmetrical structure. The central scattering slot group C1 corresponds to the center position of the speaker 11, and the distance for the sound emitted by the speaker 11 to reach the central scattering slot group C1 is the shortest. It can be understood that the left-right symmetry here is based on the first direction X. The left-right symmetric center plane of the multiple scattering slots 121 can refer to the center of the speaker 11, and the center of the speaker 11 is located on this center plane. The sound emitted by the speaker 11 is projected into each scattering slot 121, where it is phase-shifted and then scattered. Because the multiple scattering slots 121 are arranged bilaterally symmetrically, the scattered sound is also bilaterally symmetrical on the horizontal plane, further improving horizontal uniformity. In other words, after being scattered by the scatterers 12, the sound emitted by the speaker 11 is distributed more evenly in the horizontal direction, thereby improving the horizontal uniformity of the sound.

[0066] The audio module 1 provided in this embodiment of the present application has a wider horizontal directivity, a more consistent listening experience at different angles, and a brighter and clearer treble. Tests have shown that the uniformity of the sound level after being scattered by the scatterer 12 is 35.9% higher than that of existing direct-output audio modules and 7.5% higher than that of acoustic prisms.

[0067] In the audio module 1 provided in the embodiment of the present application, the number of scattering slots 121 on the scatterer 12 is not limited, but based on the setting of the central scattering slot group C1 and the side scattering slot groups C2 symmetrically arranged on both sides of the central scattering slot group C1, the number of scattering slots 121 is at least three. When the number of scattering slots 121 is an even number, the central scattering slot group C1 includes two identical scattering slots 121, and the distances between the two scattering slots 121 and the center position of the speaker 11 are equal. When the number of scattering slots 121 is an even number, the central scattering slot group C1 includes one scattering slot 121.

[0068] For example, Figure 4aThe main view of the audio module 1 shown is a view of the audio module 1 from a perspective parallel to the base 13 and from which the scattering slots 121 can be observed. The number of scattering slots 121 in the audio module 1 is six, and the central scattering slot group C1 includes two identical scattering slots 121, and the distances between the two scattering slots 121 and the center position of the speaker 11 are equal. Any group of side scattering slot groups C2 includes two scattering slots 121, and the scattering slots 121 in the two side scattering slot groups C2 are symmetrical about the central scattering slot group C1. The two scattering slots 121 in the central scattering slot group C1 have the same center distance to the speaker 11 and are shorter than the center distances between the other scattering slots 121 and the speaker 11. Here, the center distance from the scattering slot 121 to the speaker 11 refers to the distance from the center of the opening of the scattering slot 121 on the first inclined surface A1 to the center of the speaker 11.

[0069] In another embodiment, Figure 4b The front view of the audio module 1 shown is a view of the audio module 1 from a perspective parallel to the base 13 and from which the scattering slots 121 can be observed. Figure 4b In the figure, the number of scattering slots 121 is five, and the central scattering slot group C1 includes one scattering slot 121, which corresponds to the center position of the speaker 11. Any group of side scattering slot groups C2 includes two scattering slots 121, and the scattering slots 121 in the two side scattering slot groups C2 are symmetrical about the central scattering slot group C1. The center distances from the scattering slots 121 in the central scattering slot group C1 to the speaker 11 are the same and shorter than the center distances from other scattering slots 121 to the speaker 11. Here, the center distance from the scattering slot 121 to the speaker 11 refers to the distance from the center of the opening of the scattering slot 121 on the first inclined surface A1 to the center of the speaker 11.

[0070] The audio module 1 provided in the present application sets the audio module 1 so that the maximum groove depth of the central scattering groove group C1 is greater than the maximum groove depth of the side scattering groove group C2, so as to optimize the frequency response curve of the sound field and prevent obvious peaks and valleys. Among them, the maximum groove depth of the scattering groove 121 of the central scattering groove group C1 can be less than 4.9 cm, such as 4.5 cm, 3 cm, 2 cm, etc. The maximum groove depth of the scattering groove 121 in the side scattering groove C2 is less than the maximum groove depth of the scattering groove 121 in the central scattering groove group C1. Combined Figure 2c In the example shown, the maximum groove depth of the scattering groove 121 refers to the groove depth d at the farthest distance between the bottom wall 1212 of the scattering groove 121 and the first inclined surface A1. Figure 5a and Figure 5b The top view of the scatterer 12 is shown, that is, the structure of the scatterer 12 is viewed from above perpendicular to the base 13. The scatterer 12 is exemplified by taking the example that the groove depth d of each scattering groove 121 is constant along the extension direction of the scattering groove 121.

[0071] Figure 5a In the example, an even number of scattering slots 121 are used. The scattering slots 121 in the central scattering slot group C1 have a slot depth d1. The scattering slots 121 in the side scattering slot group C2 that are farthest from the central scattering slot group C1 have a slot depth d2. The scattering slots 121 in the side scattering slot group C2 that are immediately adjacent to the central scattering slot group C1 have a slot depth d3. The scattering slots 121 in the central scattering slot group C1 have the greatest slot depth, i.e., the slot depth d1 is greater than the slot depth d2, and d1 is greater than d3. For example, the slot depth d3 of the scattering slots 121 in the side scattering slot group C2 that are immediately adjacent to the central scattering slot group C1 is less than the slot depth d2 of the scattering slot 121 farthest from the central scattering slot group C1, i.e., d2 is greater than d3.

[0072] Figure 5b An odd number of scattering slots 121 is used as an example. The scattering slots 121 in the central scattering slot group C1 have a slot depth d1, the scattering slots 121 in the side scattering slot group C2 that are farthest from the central scattering slot group C1 have a slot depth d2, and the scattering slots 121 in the side scattering slot group C2 that are adjacent to the central scattering slot group C1 have a slot depth d3. The scattering slots 121 in the central scattering slot group C1 have the greatest slot depth, i.e., the slot depth d1 is greater than the slot depth d2, and the slot depth d1 is greater than the slot depth d3. For example, the slot depth d3 of the scattering slots 121 in the side scattering slot group C2 that are adjacent to the central scattering slot group C1 is less than the slot depth d2 of the scattering slot 121 farthest from the central scattering slot group C1, i.e., d2 is greater than d3.

[0073] Based on the above Figure 5a and Figure 5b In the audio module 1 shown, the groove depth d of the scattering groove 121 in the central scattering groove group C1 is greater than the groove depth d of the scattering groove 121 in the side scattering groove group C2. After the sound emitted by the speaker 11 is scattered by the scatterer 12, the frequency response of the diffuse sound field can be optimized. Figure 6 The curve showing the relationship between the frequency and sound pressure level of the sound after being scattered by the scatterer 12 shows that the frequency response of the sound changes relatively smoothly without obvious peaks and valleys, which is equivalent to weakening the intensity changes of the sound and can improve the user experience.

[0074] It should be understood that the groove depth d of the scattering groove 121 determines the lower limit of the sound frequency emitted by the speaker 11, that is, the groove depth d of the scattering groove 121 is related to the minimum frequency of the sound.

[0075] like Figure 7aIn the front view of the audio module 1 shown, the total slot width W of the multiple scattering slots 121 ranges from approximately 3.5 to 12 cm. This total slot width W is equivalent to the sum of the slot width w1 of the multiple 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 the end of one side scattering slot group C2 away from the central scattering slot group C1 and the end of the other side scattering slot group C2 away from the central scattering slot group C1.

[0076] The slot widths w1 of the scattering slots 121 may be equal or unequal, and the specific implementation may be set according to the specific manufacturing process and application scenario, which is not limited here.

[0077] When the slot widths w1 of the scattering slots 121 are equal, for any scattering slot 121, the slot width w1 of the scattering slot 121 is related to the upper limit of the sound frequency band. In the audio module 1 provided in the embodiment of the present application, the slot width of each scattering slot 121 satisfies the following conditions:

[0078] w1=c air / (2×f max );

[0079] Wherein, w1 is the width of the scattering slot 121, c air is the speed of sound, f max is the maximum frequency of the operating frequency band of the loudspeaker 11. The larger the maximum frequency of the operating frequency band of the loudspeaker 11, the smaller the slot width of the scattering slot 121.

[0080] When the audio module 1 is cut along a plane perpendicular to the second direction Y and the third direction Z, it can be obtained that Figure 7b The cross-sectional structure diagram is shown in FIG. Figure 7b Here, the slot length H of the scattering slots 121 in the central scattering slot group C1 is greater than 2 cm. Based on the structure of the scatterer 12 , the slot length H of each scattering slot 121 is different. Figure 7b In the embodiment, the sound emitting surface B of the loudspeaker 11 is parallel to the upper surface of the base 13 , and the angle between the normal direction of the sound emitting surface B and the first inclined surface A1 is β, and the range of β is 30-70°.

[0081] It should be understood that the number of scattering slots 121 may be four, seven, nine, twelve or even more, and can be set according to actual needs. The more scattering slots 121 there are, the better the diffusion effect of the scatterer 12 on the horizontal direction of sound. For any group of side scattering slot groups C2, the slot depth d of the scattering slots 121 in the side scattering slot group C2 is not limited, and the distribution of the slot depth d is not limited by the arrangement rule, as long as the slot depth d of the scattering slots 121 in the side scattering slot group C2 is less than the slot depth d of the scattering slots 121 in the center scattering slot group C1. The shape of the scatterer 12 in the audio module 1 provided in the embodiment of the present application may also have other implementation methods. For example Figure 8a The front view of the scatterer 12 is shown, and the structure of the scatterer 12 is the same as that of the scatterer 12. Figure 3b The structure of the scatterer 12 shown is similar, wherein the first inclined surface A1 is a plane, and the side away from the first inclined surface A1 is a curved surface. Figure 8b Shown Figure 8a The cross-sectional view of the scatterer 12 after being cut along the plane where PP is located is the same as Figure 3b Compared to the scatterer 12 shown, Figure 8a The scattering body 12 shown has a larger dimension in the direction of the groove depth d of the scattering groove 121 .

[0082] like Figure 9a The front view of the scatterer 12 is shown, and the structure of the scatterer 12 is a polygonal three-dimensional structure. The scatterer 12 only shows the first inclined surface A1. Figure 9b Shown Figure 9a In the cross-sectional view of the scatterer 12 cut along the plane QQ, the first inclined surface A1 of the scatterer 12 is almost flat. In the direction perpendicular to the base 13, the scatterer 12 is a quadrilateral with smooth chamfered corners.

[0083] like Figure 10a As shown in the front view of the scatterer 12 , the structure of the scatterer 12 is drum-shaped. Along the direction perpendicular to the base 13 , the top and bottom dimensions of the scatterer 12 are both smaller than the waist dimension. Figure 10b Shown Figure 10a In the cross-sectional view of the scatterer 12 taken along the plane RR, 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 circular.

[0084] Combine Figure 8b 、 Figure 9b and Figure 10b As shown, the bottom wall 1212 of the scattering slot 121 is a plane, and the cross section of the scattering slot 121 perpendicular to the extension direction is a rectangle. Figures 11a to 11d The shape of the scattering slot 121 is shown, wherein Figure 11a The bottom wall 1212 of the scattering slot 121 shown is a plane, and the bottom wall 1212 and the side wall 1211 are perpendicular to each other. Figure 11b The bottom wall 1212 of the scattering slot 121 shown is a plane. The bottom wall 1212 and the side wall 1211 are perpendicular to each other, and the bottom wall 1212 and the side wall 1211 are chamfered, so the connection transition between the bottom wall 1212 and the side wall 1211 is smoother. Figure 11c The bottom wall 1212 of the scattering slot 121 shown is a curved surface, and there is a smooth transition between the bottom wall 1212 and the side wall 1211 . Figure 11d The bottom wall 1212 of the scattering slot 121 shown forms an angle θ with the side wall 1211, and the angle θ is greater than 90°, so that the width of the bottom wall 1212 is smaller than the width of the opening of the scattering slot 121 on the first inclined surface A1. When manufacturing the scatterer 12, the shape of such a scattering slot 121 is conducive to the demolding operation.

[0085] It should be understood that the scattering slot 121 processes sound by changing its phase. Changing the shape of the scattering slot 121 can correspondingly change the effect of this phase change. Furthermore, the change in the shape of the scattering slot 121 can also lead to adjustments to the slot length H, slot width w1, and slot depth d of the scattering slot 121 to meet usage requirements.

[0086] In some embodiments, as Figure 12 The three-dimensional structure diagram of another audio module 1 is shown in FIG. 1 , in which the depth d of the scattering groove 121 in the scatterer 12 gradually increases in the direction away from the speaker 11. The scatterer 12 in the audio module 1 is Figure 9a The scatterer 12 is shown in FIG.

[0087] Combine Figure 12 , refer to Figure 13a Shown Figure 12 The enlarged view of the middle C portion takes one of the scattering slots 121 as an example. The scattering slot 121 has a bottom wall 1212 and two side walls 1211. Due to the limited viewing angle, only one of the side walls 1211 is shown. The bottom wall 1212 is indicated by diagonal shading, and the side walls 1211 are indicated by dotted shading. The side where the side wall 1211 contacts the bottom wall 1212 is the first side m, and the side of the side wall 1212 located on the first inclined surface A1 is the second side n. The distance from the second side n to the first side m can be considered as the slot depth d of the scattering slot 121, that is, the distance from the first inclined surface A1 to the bottom wall 1212.

[0088] The first side m may be a curve or a straight line, and the second side n may also be a curve or a straight line, and there is no limitation. Here, for example, the first side m and the second side n are both straight lines. When the first side m and the second side n are both straight lines, the angle between the first side m and the second side n is less than 60°. When the angle between the first side m and the second side n is 0°, the first side m and the second side n are parallel to each other, and the groove depth d at different positions of the scattering groove 121 remains consistent. When the angle between the first side m and the second side n is greater than 0°, the groove depth d of the scattering groove 121 changes linearly. Figure 13a In the figure, the first side m and the second side n are not parallel, and an angle γ is formed between them.

[0089] Continue to refer to Figure 13b The simplified schematic diagram of the first side m and the second side n shown in the example shows an angle γ between the two, and the range of the angle γ is less than 60°. The distance between the second side n and the first side m is the depth d of the scattering groove 121. In the direction away from the speaker 11, the distance between the second side n and the first side m is gradually increased, that is, the depth d of the scattering groove 12 gradually increases. The sound emitted by the speaker 11 undergoes a phase change in the scattering groove 121 and then reflects sounds of various phases. The change in the depth d of the scattering groove 121 can provide more possibilities for the phase change of the sound, that is, the reflected sound may have richer phase changes, and thus has more possible changes.

[0090] For the entire scattering body 12, the angle γ between the first side m and the second side n of the side wall 1211 in each scattering slot 121 can be set to be the same or different, which is not limited here. Specifically, when the angles between the first side m and the second side n of each scattering slot 121 are equal, the different scattering slots 121 have a more uniform appearance.

[0091] Of course, the groove depth d of the scattering groove 121 may not change linearly, that is, the first side m and the second side n may not simply form an angle relationship. On the basis of ensuring the horizontal scattering of sound, it can bring richer phase changes to the sound and enhance the listening experience.

[0092] In another embodiment, Figure 14 As shown, the first side m of the side wall 1211 can be a straight line, and the second side n can be a curve. In the scattering body 12 with such a scattering slot 121, the first inclined surface A1 is also the surface where the second side n is located, so the first inclined surface A1 can also be a curved surface.

[0093] In the above embodiment, the sound-emitting surface B of the speaker 11 is parallel to the base 13. In specific applications, the base 13 can be placed on different supporting surfaces as needed. When the supporting surface is parallel to the horizontal direction, the sound-emitting surface B of the speaker 11 is parallel to the horizontal plane. When the supporting surface forms a certain angle with the horizontal plane, the sound-emitting surface B of the speaker 11 also forms a certain angle with the horizontal plane. This angle ranges from 0° to 60°.

[0094] In some embodiments, as Figure 15 As shown, the sound emitting surface B of the speaker 11 is tilted 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 speaker B form an angle The angle The range is 0-60 degrees. When the base 13 is set on the horizontal plane, the sound-emitting surface B of the speaker 11 is equivalent to an angle between the horizontal plane and the sound-emitting surface B. It should be understood that regardless of the angle between the upper surface G of the base 13 and the sound output surface B of the speaker B Regardless of the size, the angle β between the normal direction of the sound output surface B of the loudspeaker 11 and the sound output surface B of the scatterer 12 is in the range of 30 to 70°.

[0095] The audio module 1 provided in the embodiment of the present application has high horizontal uniformity, which can provide a nearly consistent listening experience at different horizontal positions. In addition, the audio module 1 can also reduce the peaks and valleys of sound in the high frequency band, improving the user's listening experience.

[0096] Since the audio module 1 can have good uniformity in the horizontal direction, the audio module 1 can be applied to mid-range, mid-high-range and tweeter acoustic units to weaken the negative effects of the short wavelength and strong directivity of the mid-high-range to provide a good listening experience.

[0097] Regarding application scenarios, the audio module 1 can be used in situations where the uniformity of the sound level is relatively high, such as indoors, in the cockpit of a vehicle, etc. Based on this, the embodiment of the present application also provides a vehicle 10, which may include a vehicle body 2 and an audio module 1 arranged in the cockpit of the vehicle body 2. For example, Figure 16a As shown, the audio module 1 can be set in the middle of the car control panel 21 in the car cabin. Figure 16b As shown, the audio module 1 can be disposed at a corner where the A-pillar 23 and the windshield 22 are connected.

[0098] Regarding the auditory experience, when passengers are at different positions in the car cabin, the sound level will not differ much in the vertical direction, but the horizontal difference will be relatively large. The above-mentioned audio module 1 has good horizontal uniformity and can evenly scatter the sound to different positions in the horizontal direction, so that passengers sitting in different positions can get a nearly consistent auditory experience. In addition, the audio module 1 can also reduce the peaks and valleys of the sound in the treble area, so that the sound frequency response is optimized, further improving the user's auditory experience.

[0099] In particular, when audio module 1 is a tweeter module, scatterer 12 scatters the sound emitted by speaker 11, reducing the negative impact of the short wavelength and strong directionality of treble sounds. This creates a more uniform horizontal treble sound field within the vehicle cabin. Vehicles 10 equipped with a tweeter module experience a brighter, clearer sound field within the cabin, enhancing the user experience.

[0100] It should be understood that when the audio module 1 is used in a vehicle 10, the structure and shape of the audio module 1 can be further customized to suit the brand style of different vehicles. For example, a stand structure that can be raised and lowered and rotated to display the audio module 1 can be provided, giving the audio module 1 a more dynamic and visually appealing appearance. Examples are not provided here.

[0101] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An audio module, characterized in that: include: A base, a speaker, and a scatterer; the speaker and the scatterer are both fixed to the base, the scatterer is arranged on the sound output side of the speaker, and the scatterer has a first inclined surface inclined toward the speaker; Along the first direction, the scatterer is provided with a plurality of scattering slots whose openings are located on the first inclined surface, and the extension direction of each scattering slot is perpendicular to the first direction, and the first direction is parallel to the base; the first inclined surface and the inner wall of each scattering slot are used to reflect sound; The multiple scattering slots include a central scattering slot group and two side scattering slot groups. The two side scattering slot groups are identical and are symmetrically arranged on both sides of the central scattering slot group along the first direction. The central scattering slot group corresponds to the center position of the speaker; the maximum slot depth of the scattering slots in the central scattering slot group is greater than the maximum slot depth of the scattering slots in the side scattering slot group.

2. The audio module according to claim 1, wherein: There are an even number of the scattering slots, and the central scattering slot group includes two identical scattering slots. The two scattering slots in the central scattering slot group are at equal distances from the center position of the speaker.

3. The audio module according to claim 2, wherein: There are an odd number of the scattering slots, the central scattering slot group includes one scattering slot, and the center position of one scattering slot in the central scattering slot group corresponds to the center position of the speaker.

4. The audio module according to claim 1, wherein: The maximum groove depth of the scattering grooves in the central scattering groove group is less than 4.9 cm.

5. The audio module according to claim 1, wherein: The inner wall of the scattering slot includes a bottom wall and two side walls. The two side walls are respectively located on both sides of the bottom wall along the first direction. The bottom wall is inclined at an angle to the first inclined surface.

6. The audio module according to claim 5, wherein: An included angle between the bottom wall and the first inclined surface is less than 60°.

7. The audio module according to claim 6, wherein: The included angles between the bottom wall and the first inclined surface in each of the scattering slots are equal.

8. The audio module according to claim 5, wherein: A chamfer is provided at the connection between the bottom wall and the side wall.

9. The audio module according to any one of claims 1 to 8, wherein: Along the first direction, the width of each of the scattering slots is equal.

10. The audio module according to claim 9, wherein: The slot width of each scattering slot meets the following conditions: w1=c air / (2×f max ); Wherein, w1 is the width of the scattering slot, c air is the speed of sound, the f max is the maximum frequency of the loudspeaker's operating frequency band.

11. The audio module according to claim 1, wherein: Along the extension direction of the scattering slots, the slot length of each of the scattering slots is greater than 2 cm.

12. The audio module according to claim 1, wherein: Along the first direction, a distance between one end of one group of the side scattering slots away from the central scattering slots group and another end of the other group of the side scattering slots away from the central scattering slots group is 3.5-10 cm.

13. The audio module according to claim 1, wherein: The angle between the first inclined surface and the normal line of the sound output surface of the speaker is 30-70°.

14. The audio module according to claim 1, wherein: The first inclined surface is a plane or a curved surface.

15. The audio module according to claim 1, wherein: The angle between the sound emitting surface of the speaker and the base is 0-60°.

16. A vehicle, characterized in that: It comprises a vehicle body and an audio module as described in any one of claims 1-15; the audio module is arranged on the vehicle body.

17. The vehicle according to claim 16, wherein: The audio module is arranged at the center of the vehicle dashboard of the vehicle body; or, the audio module is arranged at the corner where the A-pillar and the windshield of the vehicle body are connected.

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