In-vehicle speaker system

Abstract

An in-vehicle speaker system provided by the present invention comprises: a first sound zone located in a near-ear region on the left side of an occupant; a second sound zone located in a near-ear region on the right side of the occupant; a third sound zone located on the side of the second sound zone away from the first sound zone; and a fourth sound zone located on the side of the third sound zone away from the second sound zone. The first sound zone is provided with a first speaker array comprising M speakers, the second sound zone is provided with a second speaker array comprising N speakers, and N is a natural number greater than M. The in-vehicle speaker system provided by the present invention provides a high degree of acoustic isolation for a seat area, so that the listening experience of the occupant is good.

Description

Car speaker system Technical Field

[0001] This invention relates to the field of vehicle acoustics technology, and more particularly to an in-vehicle speaker system. Background Technology

[0002] Independent sound zone technology for vehicles controls the playback of audio content in designated areas within the vehicle, and is an advanced sound field control technology with high consumer demand. This technology can be used for in-vehicle privacy calls, ensuring the privacy of call content, and zoned playback of in-vehicle entertainment audio. This allows passengers in different locations to enjoy different entertainment audio simultaneously, or to ensure that passengers do not disturb each other when some passengers are enjoying entertainment audio while others need to rest or make calls.

[0003] Using miniature speaker arrays placed in the headrests or seats of a vehicle for independent sound zone control is a solution to achieve directional audio output for different occupant positions in the vehicle. This solution makes full use of the small size of miniature speakers, and one or more arrays can be flexibly arranged in positions such as headrests, seats, or ceilings to increase the number of speakers. At the same time, the speakers in these positions are close to the listeners, which can achieve a better effect of independent sound zone control.

[0004] Typically, car door speakers, ceiling speakers, and other interior speakers are arranged symmetrically according to the vehicle's layout, while headrest speakers are usually arranged symmetrically inside the headrest relative to the headrest. However, for in-vehicle independent sound zone control algorithms, symmetrical speaker arrangement can result in uneven isolation between the independent sound zones on both sides of the listener, thus reducing the occupant's listening experience. Technical issues

[0005] Therefore, it is necessary to propose a new in-vehicle speaker system to solve the above problems. Technical solutions

[0006] The purpose of this invention is to overcome the above-mentioned technical problems and provide an in-vehicle speaker system with high average isolation.

[0007] To achieve the above objectives, the present invention provides an in-vehicle speaker system, comprising:

[0008] The first register is located in the area near the ear on the left side of the occupant.

[0009] The second register is located on the right side of the passenger, near the ear.

[0010] The third register, located on the side of the second register away from the first register.

[0011] The fourth register is located on the side of the third register that is furthest from the second register;

[0012] The first sound zone is provided with a first speaker array including M speakers, and the second sound zone is provided with a second speaker array including N speakers, where N is a natural number greater than M.

[0013] Preferably, the in-vehicle speaker system includes a first seat for occupants, with the first and second sound zones symmetrically arranged on both sides of the occupant along the central axis of the first seat.

[0014] Preferably, the first speaker array and / or the second speaker array are arranged in a matrix.

[0015] Preferably, the in-vehicle speaker system further includes a second seat for occupants, the second seat being arranged adjacent to the first seat, the third and fourth sound zones being symmetrically arranged on both sides of the occupant along the central axis of the second seat, the third sound zone being provided with the second speaker array, and the fourth sound zone being provided with the first speaker array.

[0016] Preferably, the first speaker array includes four speakers arranged in a 2×2 array.

[0017] Preferably, the second speaker array includes six speakers arranged in a 2×3 array. Beneficial effects

[0018] Compared with related technologies, the in-vehicle speaker system provided by this invention has speaker arrays containing different numbers of speakers arranged in the sound zones near the ears on both sides of the occupant, and the speaker arrays in the sound zones near adjacent seats contain more speakers. Through this asymmetrical speaker array arrangement, not only can the average acoustic isolation of the seat area be effectively improved, thereby enhancing the occupant's listening experience, but it can also better achieve the directional sound effect of different occupant seats in the vehicle. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0020] Figure 1 is a schematic diagram of the arrangement of the speaker array in the in-vehicle speaker system provided by the present invention.

[0021] Figure 2 is a schematic diagram of the arrangement of the speaker array in the in-vehicle speaker system provided by the present invention.

[0022] Figure 3 is a schematic diagram comparing the isolation of the in-vehicle speaker system provided by the present invention with that of the existing in-vehicle speaker system.

[0023] Figure 4 is a schematic diagram of the arrangement of the speaker array in an existing in-vehicle speaker system.

[0024] Figure 5 is a schematic diagram of the response of the speaker array to each sound zone in an existing in-vehicle speaker system when the first seat is unoccupied.

[0025] Figure 6 is a schematic diagram of the response of the speaker array to each sound zone in an existing in-vehicle speaker system when there is an occupant in the first seat.

[0026] Figure 7 is a schematic diagram of the isolation of each sound zone in an existing in-vehicle speaker system when there is an occupant in the first seat. The best embodiment of the present invention

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] As shown in Figures 1-2, the present invention provides an in-vehicle speaker system 100, comprising:

[0029] First register A, located in the area near the ear on the left side of the occupant.

[0030] The second register, B, is located in the area near the ear on the right side of the passenger.

[0031] The third register C is located on the side of the second register B that is furthest from the first register A.

[0032] The fourth register D is located on the side of the third register C that is away from the second register B;

[0033] The first sound zone A is provided with a first speaker array 11 including M speakers 1, and the second sound zone B is provided with a second speaker array 12 including N speakers 1, where N is a natural number greater than M.

[0034] Specifically, the in-vehicle speaker system 100 includes a first seat 10 and a second seat 20 for occupants, with the second seat 20 disposed adjacent to the first seat 10. It is understood that the first seat 10 can be a driver's seat, and the second seat 20 can be a front passenger seat or an adjacent seat in the rear.

[0035] The first sound zone A and the second sound zone B are symmetrically arranged on both sides of the occupant along the central axis of the first seat 10. Similarly, the third sound zone C and the fourth sound zone D are symmetrically arranged on both sides of the occupant along the central axis of the second seat 20.

[0036] The third sound zone C also contains the second speaker array 12, and the fourth sound zone D contains the first speaker array 11. That is, more speakers 1 are provided in the areas of the first seat 10 and the second seat 20 that are close to each other.

[0037] As shown in Figure 2, the first speaker array 11 and / or the second speaker array 12 are arranged in a matrix.

[0038] Specifically, the first speaker array 11 includes four speakers 1 arranged in a 2×2 array. The second speaker array 12 includes six speakers 1 arranged in a 2×3 array. In other embodiments, different numbers of speakers and array arrangements can be selected according to actual needs.

[0039] As shown in Figure 4, in existing in-vehicle speaker systems, the speakers installed on the first seat 10 and the second seat 20 are symmetrically arranged along the central axis of the seats. That is, the number of speakers in the left and right near-ear areas of the occupant is equal, meaning the number of speakers in the first sound zone A is equal to the number of speakers in the second sound zone B. However, this symmetrical layout for each seat cannot fully utilize the role of the speaker array in controlling the sound field of independent sound zones.

[0040] In Figure 4, the first and second sound zones A and B of the in-vehicle speaker system are set as acoustic bright zones, while the third and fourth sound zones C and D are set as acoustic dark zones. The playback of the target sound source in the bright zone is enhanced, while the playback in the dark zone is weakened.

[0041] Taking the first seat 10 as an example, because the speaker array on the first seat 10 is very close to the occupant's head, the sound emitted by the speakers will be blocked by the occupant, thus creating some interference. Figures 5 and 6 illustrate the effect of this interference. Corresponding to the layout in Figure 4, Figures 5 and 6 show the response of the speaker in the right-side near-ear area of ​​the occupant in the first frequency range A, the second frequency range B, the third frequency range C, and the fourth frequency range D. Curve A represents the acoustic response of the speaker to the first frequency range A, curve B represents the acoustic response of the speaker to the second frequency range B, curve C represents the acoustic response of the speaker to the third frequency range C, and curve D represents the acoustic response of the speaker to the fourth frequency range D.

[0042] Figure 5 shows the scenario where the first seat 10 is unoccupied. The speaker's response to the first frequency range A and the second frequency range B is similar, but significantly greater than its response to the third frequency range C and the fourth frequency range D. Figure 6 shows the scenario where the first seat 10 is occupied. It can be seen that, due to the occupant's obstruction, the speaker's response to the first frequency range A is significantly less than its response to the second frequency range B. The former is close to the response amplitude to the acoustically dark third frequency range C and the fourth frequency range D. In this case, the speaker's control effect on the first frequency range A in the target bright area will be significantly weakened.

[0043] In Figure 4, the distance from the first sound zone A near the left ear of the occupant to the third sound zone C and the fourth sound zone D is farther than that to the second sound zone B. In addition, due to the occupant's obstruction, when the speaker of the first seat 10 is used, if the same volume of sound is produced at the first sound zone A or the second sound zone B, the sound leakage from the first sound zone A to the third sound zone C or the fourth sound zone D will be less than that from the second sound zone B.

[0044] As shown in Figure 7, curve 3 represents the relative isolation between the second sound zone B and the third sound zone C, curve 5 represents the relative isolation between the first sound zone A and the third sound zone C, and curve 4 represents the average isolation between the first seat 10 and the second seat 20. Due to the greater distance between the first sound zone A and the third sound zone C, as well as the obstruction caused by the occupant, the sound emitted by the speaker array under the independent sound zone control algorithm has a greater response in the first sound zone A than in the second sound zone B. Considering the average response at the first seat 10, the response of the second sound zone B lowers the average isolation between the first seat 10 and the second seat 20. Therefore, from the perspective of independent sound zone control, more weight needs to be allocated to control the isolation between the second sound zone B and the third sound zone C.

[0045] Therefore, in the in-vehicle speaker system 100 provided by the present invention, an acoustic bright zone is created in the area of ​​the first seat 10, namely the first sound zone A and the second sound zone B, and an acoustic dark zone is created in the area of ​​the second seat 20, namely the third sound zone C and the fourth sound zone D. Taking the first seat 10 as an example, the number of speakers 1 of the second speaker array 12 arranged on the side closer to the acoustic dark zone, namely the second sound zone B, is N, and the number of speakers 1 of the first speaker array 12 arranged on the side farther from the target dark zone, namely the first sound zone A, is M, where N > M. With this arrangement, given a fixed number of speakers on the first seat 10, more speakers are placed on the side closer to the target dark zone, avoiding the influence of occupant obstruction, which can improve the isolation effect of the sound zone on the side closer to the target dark zone, thereby improving the average isolation effect of the entire seat area.

[0046] As shown in Figure 3, curve 1 represents the independent sound zone control isolation of the in-vehicle speaker system 100 provided by the present invention, and curve 2 represents the independent sound zone control isolation of the existing in-vehicle speaker system. It can be seen that, compared with the prior art, the independent sound zone control isolation of the in-vehicle speaker system 100 in the present invention is significantly improved, which effectively enhances the listening experience of passengers using the seat speakers in the vehicle.

[0047] It is understood that, in the embodiments provided by the invention, the above-mentioned speakers are all installed in the headrests of the seats inside the vehicle. In other embodiments, speakers in the roof, A / B pillars, doors, center console, and other locations may also adopt the speaker array arrangement method in this invention.

[0048] Compared with related technologies, the in-vehicle speaker system provided by this invention has speaker arrays containing different numbers of speakers arranged in the sound zones near the ears on both sides of the occupant, and the speaker arrays in the sound zones near adjacent seats contain more speakers. Through this asymmetrical speaker array arrangement, not only can the average acoustic isolation of the seat area be effectively improved, thereby enhancing the occupant's listening experience, but it can also better achieve the directional sound effect of different occupant seats in the vehicle.

[0049] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. An in-vehicle speaker system, characterized by, include: The first register is located in the area near the ear on the left side of the occupant. The second vocal range is located on the right side of the occupant, near the ear. The third register, located on the side of the second register away from the first register. The fourth register is located on the side of the third register that is furthest from the second register; The first sound zone is provided with a first speaker array including M speakers, and the second sound zone is provided with a second speaker array including N speakers, where N is a natural number greater than M.

2. The in-vehicle speaker system of claim 1, wherein, The in-vehicle speaker system includes a first seat for occupants, with the first and second sound zones symmetrically arranged on both sides of the occupant along the central axis of the first seat.

3. The in-vehicle speaker system of claim 1, wherein, The first speaker array and / or the second speaker array are arranged in a matrix.

4. The in-vehicle speaker system of claim 1, wherein, The in-vehicle speaker system also includes a second seat for occupants, which is adjacent to the first seat. The third and fourth sound zones are symmetrically arranged on both sides of the occupant along the central axis of the second seat. The third sound zone contains the second speaker array, and the fourth sound zone contains the first speaker array.

5. The in-vehicle speaker system of claim 3, wherein, The first speaker array includes four speakers arranged in a 2×2 array.

6. The in-vehicle speaker system of claim 3, wherein, The second speaker array includes six speakers arranged in a 2×3 array.

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