CN119094962A

CN119094962A - In-car speaker system

Info

Publication number: CN119094962A
Application number: CN202411440716.3A
Authority: CN
Inventors: 葛欢; 张姮李子; 叶利剑
Original assignee: Ruisheng Kaitai Acoustic Technology Shanghai Co ltd
Current assignee: Ruisheng Kaitai Acoustic Technology Shanghai Co ltd
Priority date: 2024-10-15
Filing date: 2024-10-15
Publication date: 2024-12-06

Abstract

The in-vehicle loudspeaker system comprises a first sound zone, a second sound zone, a third sound zone and a fourth sound zone, wherein the first sound zone is located in a near-ear area on the left side of an occupant, the second sound zone is located in a near-ear area on the right side of the occupant, the third sound zone is located at one side, far from the first sound zone, of the second sound zone, the fourth sound zone is located at one side, far from the second sound zone, of the third sound zone, the first sound zone is provided with a first loudspeaker array comprising M loudspeakers, the second sound zone is provided with a second loudspeaker array comprising N loudspeakers, and N is a natural number larger than M. The in-car speaker system provided by the invention has the advantages that the acoustic isolation degree of the seat area is high, and the listening experience of passengers is good.

Description

In-vehicle speaker system

[ Field of technology ]

The invention relates to the technical field of vehicle-mounted acoustics, in particular to an in-vehicle loudspeaker system.

[ Background Art ]

The vehicle-mounted independent sound zone technology is used for controlling audio content to be played in a designated area in a vehicle, and is an advanced sound field control technology with high consumer demand. The technology can be used for in-car privacy conversation, ensuring the privacy of conversation content and regional playing of in-car entertainment audio so as to realize the requirement that passengers at different positions enjoy different entertainment audio simultaneously or the requirement that when partial passengers enjoy the entertainment audio and other passengers need to rest or talk, the passengers are not disturbed.

The miniature loudspeaker arrays arranged on the vehicle-mounted headrest or the seat are adopted to control the independent sound zone, so that the scheme is a scheme for realizing audio directional sounding of different passenger positions in the vehicle, the advantage of small size of the miniature loudspeakers is fully utilized, one or more arrays can be flexibly arranged at the positions of the headrest, the seat or the ceiling and the like, the number of loudspeakers is increased, and meanwhile, the loudspeakers at the positions are closer to a listener, so that a better independent sound zone control effect can be realized.

In general, door speakers, ceiling speakers, and the like in a vehicle are symmetrically arranged according to the vehicle, and headrest speakers are generally symmetrically arranged inside a headrest with respect to the headrest. However, for the in-car independent sound zone control algorithm, the symmetrical loudspeaker arrangement can make the isolation of independent sound zones on two sides of a listener not be even enough, so that the listening experience of passengers is reduced.

Therefore, there is a need to propose a new in-vehicle speaker system to solve the above-mentioned problems.

[ Invention ]

The invention aims to overcome the technical problems and provide the in-vehicle loudspeaker system with high average isolation.

In order to achieve the above object, the present invention provides an in-vehicle speaker system comprising:

A first sound zone, the first sound zone being located in an ear-near region on the left side of the occupant,

A second sound zone located in the near-ear region on the right side of the occupant,

A third sound zone, the third sound zone being located on a side of the second sound zone remote from the first sound zone,

A fourth sound zone, which is positioned at one side of the third sound zone far from the second sound zone;

The first sound zone is provided with a first loudspeaker array comprising M loudspeakers, the second sound zone is provided with a second loudspeaker array comprising N loudspeakers, and N is a natural number larger than M.

Preferably, the in-vehicle speaker system includes a first seat for a passenger to sit on, and the first sound zone and the second sound zone are symmetrically disposed on both sides of the passenger along a central axis of the first seat.

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

Preferably, the in-vehicle speaker system further includes a second seat for a passenger to sit on, the second seat is disposed adjacent to the first seat, the third sound zone and the fourth sound zone are symmetrically disposed on two sides of the passenger along a central axis of the second seat, the second speaker array is disposed in the third sound zone, and the first speaker array is disposed in the fourth sound zone.

Preferably, the first speaker array includes four speakers, and the four speakers are arranged in a2×2 array.

Preferably, the second speaker array includes six speakers, and the six speakers are arranged in a2×3 array.

Compared with the related art, in the in-vehicle speaker system provided by the invention, the speaker arrays comprising different numbers of speakers are arranged in the sound areas of the near-ear areas on the left side and the right side of the passenger, and the speaker arrays in the sound areas close to the adjacent seats comprise more speakers.

[ Description of the drawings ]

For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

fig. 1 is a schematic diagram of an arrangement of a speaker array in an in-vehicle speaker system according to the present invention.

Fig. 2 is a schematic diagram of an arrangement of a speaker array in an in-vehicle speaker system according to the present invention.

Fig. 3 is a schematic diagram showing the comparison of isolation between an in-car speaker system and an existing in-car speaker system.

Fig. 4 is a schematic diagram showing the arrangement of a speaker array in a conventional in-vehicle speaker system.

Fig. 5 is a response diagram of a speaker array to each of the sound zones when the first seat is unoccupied in the conventional in-vehicle speaker system.

Fig. 6 is a response diagram of a speaker array to each of the sound zones when the first seat has an occupant in the conventional in-vehicle speaker system.

Fig. 7 is a schematic view showing the isolation of each sound zone when the first seat has an occupant in the conventional in-vehicle speaker system.

[ Detailed description ] of the invention

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1-2, the present invention provides an in-vehicle speaker system 100, comprising:

A first sound zone A positioned in the left ear-near region of the passenger

A second sound zone B, wherein the second sound zone B is positioned in the area near the ear on the right side of the passenger,

A third sound zone C, which is positioned at one side of the second sound zone B away from the first sound zone A,

A fourth sound zone D, which is located at a side of the third sound zone C away from the second sound zone B;

Wherein the first sound zone a is provided with a first speaker array 11 comprising M speakers 1, and the second sound zone B is provided with a second speaker array 12 comprising N speakers 1, N being a natural number larger than M.

Specifically, the in-vehicle speaker system 100 includes a first seat 10 and a second seat 20 for seating an occupant, the second seat 20 being disposed adjacent to the first seat 10. It will be appreciated that the first seat 10 may be a primary driver seat and the second seat 20 may be a secondary driver seat or a rear adjacent seat.

The first sound zone a and the second sound zone B are symmetrically disposed 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 disposed on both sides of the occupant along the central axis of the second seat 20.

The third sound zone C is also provided with the second speaker array 12, and the fourth sound zone D is provided with 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.

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

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

As shown in fig. 4, in the conventional in-vehicle speaker system, speakers mounted on the first seat 10 and the second seat 20 are symmetrically arranged along the center axis of the seats, that is, the number of speakers in the left ear-near region and the right ear-near region of the occupant is equal, that is, 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 the respective seats does not fully play a role of the speaker array in sound field control of the independent sound zone.

In fig. 4, the first audio zone a and the second audio zone B of the in-vehicle speaker system are set as acoustic bright zones, the third audio zone C and the fourth audio zone D are set as acoustic dark zones, the playback of the target sound source in the bright zones is enhanced, and the playback in the dark zones is reduced.

Taking the first seat 10 as an example, since the speaker array on the first seat 10 is closely spaced from the head of the occupant, the sound emitted from the speaker is blocked by the occupant, thereby forming a certain disturbance. Fig. 5-6 show the effect of this disturbance, corresponding to the layout in fig. 4, and fig. 5 and 6 show the response of the speaker in the near-to-the-ear region on the right side of the occupant in the first, second, third and fourth zones a, B, C and D. Wherein curve a represents the acoustic response of the speaker to the first zone a, curve B represents the acoustic response of the speaker to the second zone B, curve C represents the acoustic response of the speaker to the third zone C, and curve D represents the acoustic response of the speaker to the fourth zone D.

Fig. 5 corresponds to the case where no person is at the first seat 10, the response of the speaker to the first and second zones a and B is close and significantly greater than the response to the third and fourth zones C and D. Fig. 6 corresponds to a situation in which the first seat 10 is occupied, and it can be seen that the response of the loudspeaker to the first zone a is significantly smaller than to the second zone B, which is close in magnitude to the response to the third zone C and the fourth zone D of the acoustic darkened zone, due to the occlusion of the occupant. In this case, the control effect of the position speaker on the first sound zone a of the target bright zone is significantly reduced.

In fig. 4, the first sound zone a of the near-to-the-ear region on the left side of the occupant is farther from the third sound zone C and the fourth sound zone D than from the second sound zone B, and in addition to the shielding of the occupant, when the same-magnitude sound is generated at the first sound zone a or the second sound zone B when the speaker of the first seat 10 is used, the leakage of the sound at the first sound zone a to the third sound zone C or the fourth sound zone D is smaller than at the second sound zone B.

As shown in fig. 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. The loudspeaker array produces a greater response in the first zone a than in the second zone B due to the greater distance of the first zone a from the third zone C and the presence of occupant shielding, and the response of the second zone B reduces the average isolation between the first and second seats 10, 20 as seen in the average at the first seat 10. Therefore, from the viewpoint of the objective of independent sound zone control, more weight needs to be put in to control the degree of isolation between the second sound zone B and the third sound zone C.

Thus, in the in-vehicle speaker system 100 provided by the present invention, acoustic bright regions, i.e., the first sound region a and the second sound region B, are created in the first seat 10 region, and acoustic dark regions, i.e., the third sound region C and the fourth sound region D, are created in the second seat 20 region. Taking the first seat 10 as an example, the number of the speakers 1, which are close to the acoustic dark area, of the second speaker array 12, is N, and the number of the speakers 1, which are far away from the target dark area, of the first speaker array 12, which are arranged in the first speaker array a, is M, wherein N > M.

As shown in fig. 3, curve 1 represents the isolation of the independent sound zone control of the in-vehicle speaker system 100 provided by the present invention, and curve 2 represents the isolation of the independent sound zone control of the existing in-vehicle speaker system.

It will be appreciated that in the embodiments provided herein, the speakers are disposed within the headrest of the seat in the vehicle, and in other embodiments, speakers disposed at the roof, a/B pillar, door, center console, etc. may be disposed in the speaker array of the present invention.

While the invention has been described with respect to the above embodiments, it should be noted that modifications can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the invention.

Claims

1. An in-vehicle speaker system, comprising:

2. The vehicle interior speaker system of claim 1, wherein the vehicle interior speaker system comprises a first seat for a passenger to sit on, the first and second soundfields being symmetrically disposed on both sides of the passenger along a center axis of the first seat.

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

4. The vehicle interior speaker system according to claim 1, further comprising a second seat for seating a passenger, the second seat being disposed adjacent to the first seat, the third sound zone and the fourth sound zone being disposed symmetrically on both sides of the passenger along a center axis of the second seat, the second speaker array being disposed in the third sound zone, and the first speaker array being disposed in the fourth sound zone.

5. An in-vehicle speaker system according to claim 3, wherein the first speaker array includes four of the speakers, the four speakers being arranged in a 2 x 2 array.

6. An in-vehicle speaker system according to claim 3, wherein the second speaker array includes six of the speakers, the six speakers being arranged in a 2 x 3 array.