Audio seat and vehicle

Abstract

An audio seat and a vehicle. The audio seat comprises a seat and at least three micro-speaker arrays fixed at intervals inside the seat, wherein the seat comprises a seat body and a headrest mounted at the top of the seat body; and the micro-speaker arrays are respectively fixed inside the end of the seat body close to the headrest or / and inside the headrest. When the audio seat of the present invention is applied to a vehicle, the audio seat not only enables relatively concentrated audio playback, but also allows for a greater number of micro-speaker arrays to be arranged due to the smaller size of the micro-speaker array compared to a vehicle-mounted speaker, thereby significantly improving the effect of zoned audio playback when the audio seat is applied to a vehicle.

Description

Audio seat and vehicle TECHNICAL FIELD

[0001] The present application relates to the field of audio playing technology, and in particular to an audio seat and a vehicle. BACKGROUND

[0002] Controlling audio content to play in a designated area in a vehicle is generally referred to as directional sound or independent sound zone technology, which is a high-end sound field control technology with high consumer demand. This technology can be used for private conversation in a vehicle to ensure the privacy of the conversation content, or for sub-regional playing of entertainment audio in a vehicle to meet the needs of passengers at different positions to enjoy different entertainment audio at the same time, or for some passengers to enjoy entertainment audio while other passengers need to rest or talk without disturbing each other. Of course, directional sound or independent sound zone technology can not only be applied to cars, but also to other vehicles such as airplanes or trains.

[0003] The sound field partition control scheme in the related art is generally realized by a speaker for playing entertainment audio mounted in a vehicle, or by introducing an additional vehicle-mounted speaker array. For the former, the speakers are distributed at various positions in the vehicle, which leads to relative dispersion, and even if an algorithm is used for compensation, it is difficult to achieve a good audio sub-regional playing effect, and the isolation degree between target regions is limited. For the latter, the size of the vehicle-mounted speaker itself is large, and the space in the vehicle cannot accommodate a large number of vehicle-mounted speakers, and a regularly arranged array unit will also lead to a decrease in the effect of audio sub-regional playing due to a reduction in the number of arrays or irregular distribution.

[0004] In summary, the sound field partition control scheme in the related art has the problem of weak audio partition playing effect. TECHNICAL PROBLEM

[0005] The purpose of the present application is to provide an audio seat that can improve the effect of audio sub-regional playing in a vehicle. TECHNICAL SOLUTION

[0006] In a first aspect, the present application provides an audio seat applied to a vehicle, which comprises a seat and at least three micro-speaker arrays fixed in the seat.

[0007] Preferably, the seat comprises a seat body and a headrest mounted on the top of the seat body; the micro-speaker arrays are fixed in one end of the seat body close to the headrest or / and in the headrest.

[0008] Preferably, the micro-speaker arrays are connected in sequence to be arranged in any one of a straight line, a trapezoidal shape and a triangular shape.

[0009] Preferably, the micro-speaker arrays are fixed in the seat at equal intervals.

[0010] Preferably, at least one of the micro-speaker arrays is of an open back cavity structure.

[0011] Preferably, among the micro-speaker arrays, the micro-speaker arrays of a closed back cavity structure adopt a first driving signal processed by a full-band algorithm; the micro-speaker arrays of an open back cavity structure adopt a second driving signal processed by frequency division, and the mid-high frequency band of the second driving signal is processed by a directivity control algorithm.

[0012] Preferably, the low frequency band of the second driving signal is processed by a delay correction.

[0013] Preferably, the rated power of the micro-speaker arrays is less than 10 W, and the driving voltage of the micro-speaker arrays is less than 15 V.

[0014] Preferably, the micro-speaker arrays include eight, among which six are sequentially connected to be arranged in a straight line with no micro-speaker array arranged in the middle part, and the other two are located on one side of the other six micro-speaker arrays.

[0015] Preferably, the audio seat is any one of a cinema seat, a game seat, a car seat and an office seat.

[0016] In a second aspect, the present application provides a carrier, which is any one of an airplane, a train and a car, comprising a carrier body and a plurality of seats fixed in the carrier body, at least one of the seats being the audio seat as described above. Advantages

[0017] Compared with the prior art, the audio seat of the present application can not only make the audio playing relatively concentrated when it is applied to a carrier, but also greatly improve the effect of audio playing in different areas when it is applied to a carrier, because the size of the micro-speaker arrays is smaller than that of the vehicle-mounted speakers, and more micro-speaker arrays can be arranged. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments description. Obviously, the drawings described in the following are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0019] Fig. 1 is a first structural schematic diagram of an audio seat provided by an embodiment of the present application;

[0020] Fig. 2 is a second structural schematic diagram of the audio seat provided by the embodiment of the present application;

[0021] Fig. 3 is a third structural schematic diagram of the audio seat provided by the embodiment of the present application;

[0022] Fig. 4 is a fourth structural schematic diagram of the audio seat provided by the embodiment of the present application;

[0023] Fig. 5 is a structural schematic diagram of two kinds of micro-speaker arrays in the audio seat provided by the embodiment of the present application;

[0024] Fig. 6 is a sound pressure level comparison example diagram of near-field radiation and far-field radiation of a micro-speaker array in the audio seat provided by the embodiment of the present application, in which the rear cavity is not communicated with the outside;

[0025] Fig. 7 is a sound pressure level comparison example diagram of near-field radiation and far-field radiation of a micro-speaker array in the audio seat provided by the embodiment of the present application, in which the rear cavity is communicated with the outside;

[0026] Fig. 8 is a signal processing schematic diagram of the audio seat provided by the embodiment of the present application;

[0027] Fig. 9 is an impulse response example diagram in an array control algorithm filter network of the audio seat provided by the embodiment of the present application;

[0028] Fig. 10 is a structural schematic diagram of a vehicle provided by an embodiment of the present application.

[0029] Among them, 100, audio seat; 1, seat; 11, seat body; 12, headrest; 2, micro-speaker array; 21, rear cavity; 200, vehicle; 201, vehicle body. Embodiment of the present application

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative effort are within the scope of protection of the present application.

[0031] Embodiment one

[0032] The present application provides an audio seat 100, which is shown in combination with FIG. 1 to FIG. 4, comprising a seat 1 and at least three micro-speaker arrays 2 fixed in the seat 1.

[0033] The audio seat 100 is applied to a vehicle, used as a seat of the vehicle, and the vehicle is an airplane, a train or a car, etc. Of course, according to actual needs, the audio seat 100 can also be used as a cinema seat, a game seat or an office seat, etc.

[0034] The rated power of the micro-speaker array 2 is less than 10W, and the driving voltage of the micro-speaker array 2 is less than 15V.

[0035] The micro-speaker arrays 2 are connected in sequence and arranged in any one of a straight line, a trapezoidal shape and a triangular shape. Of course, according to actual needs, the at least three micro-speaker arrays 2 can also be arranged in other shapes or irregularly after being connected in sequence

[0036] The micro-speaker arrays 2 are fixed in the seat 1 at equal intervals. Of course, according to actual needs, the micro-speaker arrays 2 can also be fixed in the seat 1 at unequal intervals.

[0037] FIG. 5 is a structural schematic diagram of two kinds of micro-speaker arrays 2, wherein (a) is a structure of the micro-speaker array 2 with a rear cavity 21 not communicating with the outside, and (b) is a structure of the micro-speaker array 2 with the rear cavity 21 communicating with the outside.

[0038] The rear cavity 21 of one or more micro-speaker arrays 2 communicates with the outside. This design can guide the sound radiated backward by the vibration unit of the micro-speaker array 2 outwards through reasonable pipeline design, and according to the characteristics of sound waves, combined with reasonable pipeline design, audio guiding mode and direction design, etc., the far-field radiation audio of the middle and low frequency bands can be offset to maintain better radiation effect in the near field, so as to improve the audio pointing effect of the middle and low frequency bands to a certain extent, and combined with the directivity control algorithm processing of the driving signal, higher performance of the directivity control function can also be realized. The sound radiated backward by the vibration unit of the micro-speaker array 2 with the rear cavity 21 not communicating with the outside will be blocked inside the cavity and will not affect the sound waves radiated forward, which can prevent sound short circuit and improve the output capacity.

[0039] In combination with FIG. 6 and FIG. 7, the micro-speaker array 2 with the rear cavity 21 not communicating with the outside, referred to as the micro-speaker array 2 with the closed rear cavity 21 structure, is also referred to as the open rear cavity design, and the response difference between the near field and the far field is mainly due to the attenuation caused by the distance. The micro-speaker array 2 with the rear cavity 21 communicating with the outside, referred to as the micro-speaker array 2 with the open rear cavity 21 structure, is also referred to as the closed cavity design. Due to the special structure design, the response of the near field and the far field has an additional difference introduced by the acoustic structure in addition to the difference caused by the distance attenuation. For the middle and low frequency band, the introduction of the open rear cavity 21 can bring a sound pressure level difference of more than 25 dB between the near field and the far field, thereby significantly improving the directivity of sound radiation. Therefore, the micro-speaker array 2 with the open rear cavity 21 can improve the directivity of the audio seat 100 itself.

[0040] In the micro-speaker array 2, the micro-speaker array 2 with the rear cavity 21 not communicating with the outside uses the first driving signal processed by the full-band algorithm; the micro-speaker array 2 with the rear cavity 21 communicating with the outside uses the second driving signal processed by the frequency division, and the middle and high frequency band of the driving signal is processed by the directivity control algorithm, and the middle and low frequency band of the driving signal is processed by the delay correction.

[0041] The seat 1 includes a seat body 11 and a headrest 12 mounted on the top of the seat body 11; at least three micro-speaker arrays 2 are fixed in the seat body 11 near one end of the headrest 12 or / and in the headrest 12.

[0042] In order to better understand the various arrangement modes of the micro-speaker array 2 and the beneficial effects brought by the arrangement modes, the following will take eight micro-speaker arrays 2 as an example for arrangement:

[0043] FIG. 1 is a first arrangement mode of the micro-speaker array 2, wherein (a) is a front view of the audio seat 100, (b) is a planar headrest 12 top view, and (c) is a half-enclosed headrest 12 top view. As can be seen from FIG. 1, eight micro-speaker arrays 2 are arranged in a straight line by being sequentially connected, and another eight micro-speaker arrays 2 are arranged at equal intervals.

[0044] Figure 2 is a second arrangement of the micro-speaker array 2, wherein (a) is a front view of a first arrangement of eight micro-speaker arrays 2 in the audio seat 100, (b) is a front view of a second arrangement of eight micro-speaker arrays 2 in the audio seat 100, (c) is a plan view of the flat headrest 12 of the first and second arrangements of eight micro-speaker arrays 2, and (d) is a plan view of the two-side semi-enclosed headrest 12 of the first and second arrangements of eight micro-speaker arrays 2. As shown in Figure 2, six micro-speaker arrays 2 are arranged in a straight line by being connected in sequence, and the middle part is not provided with a micro-speaker array 2, and the other two micro-speaker arrays 2 are arranged on one side of the six micro-speaker arrays 2, and are also arranged in the middle part of the six micro-speaker arrays 2 connected in sequence, and the eight micro-speaker arrays 2 are arranged in the headrest 12. This design can avoid the head of the passenger blocking the sound of the micro-speaker array 2, so as to improve the sound effect of the micro-speaker array 2.

[0045] Figure 3 is a third arrangement of the micro-speaker array 2, wherein (a) is a front view of a first arrangement of eight micro-speaker arrays 2 in the audio seat 100, (b) is a front view of a second arrangement of eight micro-speaker arrays 2 in the audio seat 100. As shown in Figure 3, six micro-speaker arrays 2 are arranged in a straight line by being connected in sequence, and the middle part is not provided with a micro-speaker array 2, and the six micro-speaker arrays 2 are arranged in the headrest 12, and the other two micro-speaker arrays 2 are arranged in the seat body 11, which can be arranged in the middle part of the six micro-speaker arrays 2 connected in sequence, or can be arranged at both ends of the six micro-speaker arrays 2 connected in sequence. This design can also avoid the head of the passenger blocking the sound of the micro-speaker array 2, so as to improve the sound effect of the micro-speaker array 2.

[0046] Fig. 4 is a fourth arrangement of the micro-speaker array 2, wherein (a) is the first arrangement of the micro-speaker array 2, (b) is the second arrangement of the micro-speaker array 2, and (c) is the arrangement of (b) in Fig. 3. The difference is that the micro-speaker array 2 in the first arrangement of the micro-speaker array 2, the second arrangement of the micro-speaker array 2, and the third arrangement of the micro-speaker array 2 all use the micro-speaker array 2 with the open back cavity 21, while the fourth arrangement of the micro-speaker array 2 uses the micro-speaker array 2 including the micro-speaker array 2 with the open back cavity 21 and the micro-speaker array 2 with the closed back cavity 21, wherein the micro-speaker array 2 with the open back cavity 21 is directly represented by a square box, and the micro-speaker array 2 with the closed back cavity 21 is represented by a striped square box. In addition, the mixed arrangement is not limited to the arrangement in Fig. 4, and other mixed arrangements can be used according to actual needs.

[0047] Of course, the above four arrangements of the micro-speaker array 2 are only examples, and other arrangements can be used according to actual needs.

[0048] The array directivity control algorithm in the related art is based on the test of the performance of the loudspeaker itself and the acoustic environment of the array application, and a certain processing is performed on the audio signal provided to each array unit loudspeaker, so that the array can radiate sound to the pre-set target sound emitting area, while suppressing the radiation of audio to the pre-set target suppression area, thereby achieving the target of directional sound emission or regional sound emission.

[0049] The audio seat 100 proposed in the embodiment can introduce the array directivity control algorithm on the basis of the micro-speaker array 2 with the open back cavity 21 and the arrangement design in different forms, so as to further improve the directivity sound emission effect. Compared with the micro-speaker array 2 with the closed back cavity 21, the improvement of the directivity sound emission performance brought by the micro-speaker array 2 with the open back cavity 21 is mainly concentrated in the middle and low frequency bands.

[0050] The array directivity control algorithm in the related art usually adopts a filter network to filter each input signal given to each speaker drive channel, and the parameters of the filter network are determined by the response characteristics of each speaker itself, the in-vehicle environment where the speaker is located, the target sound emitting area and the sound suppression area, etc. For vehicle-mounted applications, whether a speaker in the vehicle is directly used or an additional speaker array is used for directivity control, the number of output channels will be relatively large, such as 6 channels or more, and each output channel needs to introduce independent filter processing. For multi-channel audio playback, each additional input audio channel requires an additional number of filter processing equal to the number of output channels. Therefore, in vehicle-mounted applications, to achieve a good directivity control algorithm or independent audio zone playback, a large amount of processor computing resources needs to be consumed.

[0051] Correspondingly, for the array directivity control algorithm, as an additional signal processing module added between the input signal and the output signal of the speaker, it can be regarded as an independent system, and the impulse response of the system directly determines the pros and cons of the effect of the directivity control algorithm and the required calculation amount. When the control algorithm needs to accurately model and restore the low frequency band, the order requirement of the impulse response of the control system will be very high, which will greatly increase the demand for calculation amount.

[0052] In combination with FIG. 8, the audio seat 100 of the present embodiment adopts an application mode of combining the array directivity control algorithm with the micro speaker array 2 of the open back cavity 21. For the input audio signal, after two-channel frequency division processing, the high frequency band signal is processed by the directivity algorithm, and the low frequency band signal is not processed by the directivity algorithm but is mixed with the mid-high frequency band signal processed by the directivity algorithm after some delay correction, to drive the micro speaker array 2 of the open back cavity 21. That is, the micro speaker array 2 of the open back cavity 21 no longer needs to process the mid-low frequency band signal, and therefore the filter length of the algorithm can be greatly reduced.

[0053] In the present embodiment, the mid-high frequency band signal of the audio seat 100 is processed by the array directivity control algorithm to improve the directivity of the corresponding frequency band of the micro speaker array 2, and the mid-low frequency band signal is not processed by the additional directivity improvement algorithm, but only uses the structural design characteristics of the open back cavity 21 to achieve the directivity effect of the mid-low frequency band. The combination of the two achieves the directivity control of the full frequency band. The frequency division point selection of the frequency division processing needs to be selected according to the structural design characteristics and performance characteristics of the micro speaker array 2 of the open back cavity 21.

[0054] Fig. 9 is an example diagram of impulse responses in the array control algorithm filtering network, wherein (a) is an example diagram of filter impulse responses required for processing full-band signals, and (b) is an example diagram of filter impulse responses required for processing only high-pass filtered mid-high frequency signals. As can be seen from Fig. 9, the filter for directly processing full-band signals has a relatively obvious low-frequency tail, and even if a 5000-point long impulse response is used, the entire impulse response amplitude cannot be attenuated to a sufficiently small value. In the case of processing only mid-high frequencies, the impulse response amplitude is attenuated to a sufficiently small value after about 3000 points, i.e., in the case of processing only mid-high frequencies, the number of points required for the directivity control filter can be reduced by about half, and the calculation amount required for filtering processing can be significantly reduced.

[0055] Compared with the prior art, the audio seat 100 of the embodiment can make audio playing relatively concentrated when applied to a vehicle, and can greatly improve the effect of audio playing in different areas when applied to a vehicle, because the size of the audio seat 100 is smaller than that of a vehicle-mounted loudspeaker, and the audio seat 100 can be arranged in a larger number.

[0056] Embodiment Two

[0057] A vehicle 200, in combination with Fig. 10, includes a vehicle body 201 and four seats fixed in the vehicle body 201.

[0058] The seat of the driver is the audio seat 100 as in the above embodiment. Of course, according to time requirements, one or more other seats can also be designed as the audio seat 100 as in the above embodiment.

[0059] Because the vehicle 200 in the embodiment uses the audio seat 100 as in the above embodiment, the vehicle 200 can also achieve the technical effects of the audio seat 100 as in the above embodiment, and thus repeated description is omitted here.

[0060] The above description is only an embodiment of the present application, and it should be pointed out that, for those skilled in the art, improvements can be made without departing from the concept of the present application, but these improvements are within the protection scope of the present application.

Claims

1. An audio seat, characterized by, The audio seat comprises a seat and at least three micro-speaker arrays fixed in the seat at intervals; The seat comprises a seat body and a headrest installed on the top of the seat body; the micro-speaker arrays are fixed in the seat body near one end of the headrest or / and in the headrest.

2. The audio seat of claim 1, wherein, The micro-speaker arrays are arranged in any one of a straight line, a trapezoid and a triangle.

3. The audio seat of claim 1, wherein, The micro-speaker arrays are fixed in the seat at equal intervals.

4. The audio seat of claim 1, wherein, At least one of the micro-speaker arrays is of an open back cavity structure.

5. The audio seat of claim 4, wherein, The micro-speaker array of the closed back cavity structure adopts a first driving signal processed by a full-band algorithm. The micro-speaker array of the open back cavity structure adopts a second driving signal processed by frequency division, and the mid-high frequency band of the second driving signal is processed by a directivity control algorithm.

6. The audio seat of claim 5, wherein, The low frequency band of the second driving signal is processed by a delay correction.

7. The audio seat of claim 1, wherein, The rated power of the micro-speaker array is less than 10W, and the driving voltage of the micro-speaker array is less than 15V.

8. The audio seat of claim 1, wherein, The micro-speaker comprises eight, six of which are connected in sequence to form a straight line and the middle part is not provided with the micro-speaker, and the other two are located on one side of the six micro-speakers.

9. The audio seat of any of claims 1 to 8, wherein, The audio seat is any one of a cinema seat, a game seat, a car seat and an office seat.

10. A carrier, characterized by The carrier is any one of an airplane, a train and a car, and the carrier comprises a carrier body and a plurality of seats fixed in the carrier body, at least one of the seats being the audio seat of any one of claims 1 to 8.

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