In-vehicle sound field partitioning device
By installing an audio processing system with microphone and speaker modules inside the vehicle, and using phase-inverting signal technology to achieve sound field zoning between passengers, the problem of increased curb weight and fuel consumption caused by sound isolation in existing technologies is solved, thereby improving in-vehicle privacy and comfort.
Patent Information
- Application Number
- CN202423202079.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-24
AI Technical Summary
In existing technologies, sound isolation between passengers is achieved by installing partitions inside the vehicle, which leads to an increase in vehicle weight and fuel costs, and is also unsightly.
An in-vehicle sound field zoning device is adopted, which uses an audio processing system composed of a microphone module, a speaker module and a power amplifier module. It uses phase inversion technology to play an inverted signal in the target area to isolate the sound, and combines the microphone and speaker modules in the non-target area to isolate the sound.
It achieves privacy protection among passengers, reduces the possibility of occupants outside the target area hearing sounds from the target area, improves the privacy and comfort of occupants inside the vehicle, and avoids an increase in curb weight and fuel consumption.
Smart Images
Figure CN223584335U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to physical field especially, and it relates to sound processing technology, and particularly relates to speaker noise reduction technology, and specifically is a kind of in-car sound field partition device. BACKGROUND
[0002] Under the in-car environment, in part occasions, front and rear passengers need to achieve mutual sound insulation for privacy consideration, and cannot hear the conversation content of each other.
[0003] In prior art, the way of adding partition board to front and rear rows is used to realize sound insulation effect from physical level, on the one hand, it is not beautiful, on the other hand, it will increase the prepared mass of automobile, thereby increasing fuel consumption, cost and the like. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a kind of in-car sound field partition device for solving the problems indicated in the above background technology.
[0005] The utility model provides a kind of in-car sound field partition device, the in-car sound field partition device is used to carry out sound field partition to target area in car, the in-car sound field partition device includes: audio processing module and at least one first power amplifier module, at least one first loudspeaker module and at least one first microphone module;One first microphone module corresponds one first loudspeaker module and one first power amplifier module, each first microphone module and corresponding first loudspeaker module are as a group, and corresponding first seat area in target area is arranged;The target area includes at least one first seat area;The first microphone module is connected with the audio processing module, wherein the first microphone module is used to collect first sound signal in the first seat area, and the first sound signal is sent to the audio processing module;The audio processing module is connected with the first power amplifier module, and the audio processing module is used to process the first sound signal, obtain the first sound signal first anti-phase signal, and the first anti-phase signal is sent to the first power amplifier module;The first power amplifier module is connected with the first loudspeaker module, and the first power amplifier module is used to drive the first loudspeaker module to emit the first anti-phase signal after power amplification to realize the sound field partition of target area after the first anti-phase signal is power amplified.
[0006] The working principle of the utility model is that the first microphone module and the first speaker module are arranged in the first seat area, the first sound signal in the first seat area is collected through the first microphone module, the first sound signal is processed through the audio processing module, the first anti-phase signal of the first sound signal is obtained, finally, the first anti-phase signal after power amplification is played through the first power amplification module and the first speaker module, so that the sound field partition of the target area is realized, the possibility that the passengers in other areas except the target area hear the sound in the target area is reduced, and the privacy between the passengers in the vehicle is improved.
[0007] In an implementation mode of the utility model, the in-vehicle sound field partition device further comprises: at least one second microphone module, at least one second speaker module and at least one second power amplification module; one second microphone module corresponds to one second speaker module and one second power amplification module, each second microphone module and the corresponding second speaker module are taken as a group and are arranged in a second seat area in a non-target area except the target area; the non-target area comprises at least one second seat area; the second microphone module is connected with the audio processing module, wherein the second microphone module is used for collecting a second sound signal leaked from the target area and sending the second sound signal to the audio processing module; the audio processing module is connected with the second power amplification module, the audio processing module is used for processing the second sound signal, obtaining a second anti-phase signal of the second sound signal and sending the second anti-phase signal to the second power amplification module; the second power amplification module is connected with the second speaker module, and the second power amplification module is used for driving the second speaker module to emit the second anti-phase signal after power amplification.
[0008] In the implementation mode, the second microphone module and the second speaker module are arranged in the non-target area except the target area, so that the sound leaked from the target area is isolated, and the privacy of the target area is further improved.
[0009] In an implementation mode of the utility model, the in-vehicle sound field partition device further comprises: at least one third speaker module and at least one third power amplification module; wherein one third speaker module corresponds to one third power amplification module, the third speaker module is arranged in a door area, and the third speaker module is connected with the third power amplification module; the third power amplification module is also connected with the audio processing module, and the third power amplification module is used for driving the third speaker module to emit the second anti-phase signal after power amplification.
[0010] In the present implementation, by setting the third speaker module on the door area, further isolation of the sound leaked from the target area is achieved, thereby further improving the privacy of the target area.
[0011] In an implementation mode of the present application, the first microphone module and / or the first speaker module are arranged on the seat headrest of the first seat area.
[0012] In the present implementation, by arranging the first microphone module on the seat headrest, better collection of sound signals (head against the headrest, sound emitted from the mouth) can be achieved.
[0013] In an implementation mode of the present application, the first speaker module includes at least one speaker group; each speaker group includes two speakers arranged back to back; the speakers are connected to the first power amplifier module.
[0014] In the present implementation, by arranging two speakers arranged back to back, a phase difference of 180° can be achieved, thereby achieving better sound cancellation effect.
[0015] In an implementation mode of the present application, the first microphone module includes at least one microphone; when the first microphone module includes two microphones, the two microphones are arranged at a first position and a second position of the seat headrest of the first seat area; when the occupant sits on the seat of the first seat area, the first position and the second position are located on both sides of the head of the occupant, respectively.
[0016] In the present implementation, by arranging two microphones, and arranging the two microphones on both sides of the head of the occupant, more comprehensive collection of sound signals can be achieved.
[0017] In an implementation mode of the present application, the audio processing module adopts a digital signal processor.
[0018] As described above, the in-vehicle sound field partitioning device has the following beneficial effects:
[0019] Compared with the prior art, the present application provides a novel sound isolation method, which emits an anti-phase signal through a speaker, thereby achieving sound isolation and playing a good privacy protection role. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 A working principle block diagram of the in-vehicle sound field partitioning device according to the embodiments of the present application is shown.
[0021] Figure 2 A structure schematic diagram of the in-vehicle sound field partitioning device according to the embodiments of the present application is shown. DETAILED DESCRIPTION
[0022] Other advantages and effects of the present application can be easily understood by those skilled in the art from the contents disclosed in the present specification. The present application can also be implemented or applied in other different embodiments, and each detail in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.
[0023] It should be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of the present application, and only show the components related to the present application in the diagrams, not the number, shape and size of the components when actually implemented. The shape, number and ratio of each component when actually implemented can be randomly changed, and the layout pattern of the components can also be more complex.
[0024] Referring to Figure 1 and Figure 2 The following embodiments of the present application provide an in-vehicle sound field partition device. Compared with the prior art, the present application provides a new sound isolation method, which realizes sound isolation by emitting an anti-phase signal from a loudspeaker, thereby achieving good privacy protection.
[0025] The technical solutions of the present application will be described in detail below with reference to the embodiments of the present application and the accompanying drawings.
[0026] As Figure 1 shown, in an embodiment, the present application provides an in-vehicle sound field partition device for sound field partitioning of a target area in a vehicle, which comprises an audio processing module 1 and at least one first power amplification module 2, at least one first loudspeaker module 3 and at least one first microphone module 4.
[0027] Specifically, one of the first microphone modules 4 corresponds to one of the first speaker modules 3 and one of the first power amplifier modules 2, each of the first microphone modules 4 and the corresponding first speaker module 3 as a group, corresponding to a first seat area in the target area; the target area includes at least one first seat area; the first microphone module 4 is connected with the audio processing module 1, wherein the first microphone module 4 is used to collect the first sound signal in the first seat area and send the first sound signal to the audio processing module 1; the audio processing module 1 is connected with the first power amplifier module 2, and the audio processing module 1 is used to process the first sound signal, obtain the first anti-phase signal of the first sound signal, and send the first anti-phase signal to the first power amplifier module 2; the first power amplifier module 2 is connected with the first speaker module 3, and the first power amplifier module 2 is used to drive the first speaker module 3 to emit the first anti-phase signal after power amplification to realize the sound field partition of the target area.
[0028] In an embodiment, the number of first seat areas (actually corresponding to the number of seats) contained in the target area is equal to the number of first microphone modules 4 and first speaker modules 3, that is, if the target area contains two first seat areas, there will be two first microphone modules 4 and two first speaker modules 3, and there will also be two first power amplifier modules 2; wherein a microphone module 4 and a first speaker module 3 as a group, there are two groups, respectively arranged in the two first seat areas.
[0029] It should be noted that considering that one passenger sits on one car seat, according to the number of first seat areas contained in the target area, it is determined which areas in the car are sound field partitioned, that is, which passenger's sound is isolated; such as, the target area contains two first seat areas, which are the driver seat area and the front passenger seat area, respectively, then the utility model is to partition the front area (driver seat area + front passenger seat area) to sound field, so that the sound signal in the front area will not be heard by the passengers in the rear area, realizing the sound isolation of the driver and the front passenger; in this case, the first sound signal includes the sound signal corresponding to the driver's voice and / or the sound signal corresponding to the front passenger's voice.
[0030] Similarly, when the target area only contains one first seat area, the utility model is to carry out sound field partitioning on the first seat area, so that the sound signal in the first seat area cannot be heard by the passengers in other areas; for example, the first seat area is the main driver seat area, so when the driver in the vehicle speaks, he will not be heard by other passengers, that is, the driver is protected in privacy.
[0031] It should be noted that the audio processing module 1 processes the first sound signal to obtain the first inverted signal, which adopts a conventional technical means in the field and utilizes the following working principle: the inversion processing of the sound signal refers to reversing the phase of the audio signal by 180 degrees, so that two or more audio signals have a 180° phase difference in time, resulting in mutual cancellation of the sound signals, thereby affecting the sound quality, volume and stereo effect.
[0032] As shown in Figure 2 , in an embodiment, the first microphone module 4 and / or the first loudspeaker module 3 are arranged on the seat headrest of the first seat area.
[0033] It should be noted that, considering that sound is emitted from the mouth, in this embodiment, the first microphone module 4 is arranged on the seat headrest, so that the first microphone module 4 is closer to the head (mouth) of the passenger, thereby better collecting sound signals.
[0034] As shown in Figure 1 and Figure 2 , in an embodiment, the first loudspeaker module 3 includes at least one loudspeaker group 301; each loudspeaker group 301 includes two loudspeakers 3011 arranged back to back; the loudspeakers 3011 are connected to the first power amplifier module 2.
[0035] It should be noted that by designing each loudspeaker group to include two loudspeakers arranged back to back (as shown in Figure 2 ), on the one hand, it can better cancel the first sound signal; on the other hand, back-to-back arrangement can achieve a better 180° phase difference, thereby further improving the sound cancellation effect and further ensuring the privacy of the target area.
[0036] As shown in Figure 2 , in an embodiment, the first loudspeaker module 3 includes two loudspeaker groups 301.
[0037] It should be noted that by providing two loudspeaker groups 301, better sound isolation effect can be achieved for the target area.
[0038] As shown in Figure 2As shown, in an embodiment, the first microphone module 4 comprises at least one microphone 401.
[0039] As shown, in an embodiment, the first microphone module 4 comprises at least one microphone 401. Figure 2 As shown, when the first microphone module 4 comprises two microphones 401, the two microphones 401 are respectively arranged at a first position and a second position of a seat headrest of the first seat area; when the occupant sits on the seat of the first seat area, the first position and the second position are respectively located on both sides of the head of the occupant.
[0040] It should be noted that in the present embodiment, by arranging two microphones on both sides of the head of the occupant, better collection of sound signals can be achieved.
[0041] In an embodiment, the audio processing module 1 adopts a digital signal processor.
[0042] Digital signal processor, English full name: Digital Signal Processor, English abbreviation: DSP, is a microprocessor specially used for (usually real-time) digital signal processing.
[0043] As shown, in an embodiment, the in-vehicle sound field partitioning device further comprises at least one second microphone module 5, at least one second speaker module 6 and at least one second power amplification module 7. Figure 1 Figure 2 As shown, in an embodiment, the in-vehicle sound field partitioning device further comprises at least one second microphone module 5, at least one second speaker module 6 and at least one second power amplification module 7.
[0044] Specifically, one second microphone module 5 corresponds to one second speaker module 6 and one second power amplification module 7, each second microphone module 5 and the corresponding second speaker module 6 form a group, and are correspondingly arranged in a second seat area of a non-target area other than the target area; the non-target area comprises at least one second seat area; the second microphone module 5 is connected with the audio processing module 1, wherein the second microphone module 5 is used for collecting a second sound signal (the first sound signal described above includes the second sound signal) leaked from the target area, and sending the second sound signal to the audio processing module 1; the audio processing module 1 is connected with the second power amplification module 7, and the audio processing module 1 is used for processing the second sound signal, obtaining a second anti-phase signal of the second sound signal, and sending the second anti-phase signal to the second power amplification module 7; the second power amplification module 7 is connected with the second speaker module 6, and the second power amplification module 7 is used for driving the second speaker module 6 to emit the second anti-phase signal after power amplification.
[0045] It should be noted that in the embodiment, the sound signals leaked from the target area are isolated to further improve the privacy in the target area. Specifically, the second microphone module 5 and the second loudspeaker module 6 are arranged in the second seat area in the non-target area, the second sound signals leaked from the target area are collected by the second microphone module 5, and then the second sound signals are processed by the audio processing module 1 to obtain the second anti-phase signals of the second sound signals. Finally, the second power amplifier module 7 and the second loudspeaker module 6 are used to play the second anti-phase signals after power amplification, so as to further assist in improving the privacy in the target area and reducing the possibility that the passengers in the non-target area hear the sound in the target area.
[0046] In an embodiment, the number of second seat areas (which actually corresponds to the number of seats) included in the non-target area is equal to the number of second microphone modules 5 and second loudspeaker modules 6, that is, if the non-target area includes two second seat areas, there will be two second microphone modules 5 and two second loudspeaker modules 6, and there will also be two second power amplifier modules 7. Among them, one second microphone module 5 and one second loudspeaker module 6 form a group, and there are two groups arranged in the two second seat areas.
[0047] For example, as shown in Figure 2 In an embodiment, the target area includes two first seat areas, which are the main driver seat area and the co-driver seat area. The non-target area includes three second seat areas, which are the areas corresponding to the three seats in the rear row of the vehicle. That is, the sound field of the front row area is divided, so that the sound signals in the front row area cannot be heard by the passengers in the rear row area (including three second seat areas), and the sound isolation of the driver and the co-driver passenger is realized. Specifically, one second microphone module 5 and one second loudspeaker module 6 form a group, and there are three groups arranged in the three second seat areas. Then, the second sound signals are collected by the second microphone module 5, and the second anti-phase signals after power amplification are played by the second loudspeaker module 6, so that the passengers in the rear row area cannot hear the sound in the front row area.
[0048] For example, as shown in Figure 1 and Figure 2As shown, in an embodiment, the in-vehicle sound field partitioning device further comprises: at least one third speaker module 8 and at least one third power amplification module 9; wherein one of the third speaker modules 8 corresponds to one of the third power amplification modules 9, the third speaker module 8 is arranged in a door area, and the third speaker module 8 is connected to the third power amplification module 9; the third power amplification module 9 is further connected to the audio processing module 1, and the third power amplification module 9 is used to drive the third speaker module 8 to emit the second anti-phase signal that has been power-amplified after the second anti-phase signal is power-amplified by the third power amplification module 9.
[0049] In an embodiment, the third speaker module 8 comprises a speaker.
[0050] In an embodiment, the door area is an area corresponding to a door in the non-target area.
[0051] It should be noted that the number of third speaker modules 8 and third power amplification modules 9 is equal to the number of door areas included in the non-target area.
[0052] Specifically, the non-target area includes the second seat area and the door area; in this embodiment, by arranging the third speaker module 8 in the door area and playing the second anti-phase signal that has been power-amplified by the third power amplification module 9, the isolation of the sound in the target area can be further realized, and the privacy in the target area can be improved.
[0053] For example, as shown in FIG. 1, the in-vehicle sound field partitioning device comprises a first speaker module 2, a second speaker module 3, a third speaker module 8, a fourth speaker module 10, a first power amplification module 4, a second power amplification module 5, a third power amplification module 9, a fourth power amplification module 11, and an audio processing module 1. Figure 2 As shown, in an embodiment, the non-target area is the rear area in the vehicle, and the corresponding door area has two, i.e., the areas corresponding to the two doors in the rear row of the vehicle; specifically, in this embodiment, there are two third speaker modules 8 and two third power amplification modules 9, wherein the two third speaker modules 8 are arranged in the areas corresponding to the two doors in the rear row of the vehicle; of course, the door area can also have only one, i.e., the one door area is one of the areas corresponding to the two doors in the rear row of the vehicle, and correspondingly, the number of third speaker modules 8 and third power amplification modules 9 is also one, i.e., one third speaker module 8 is arranged in the one door area.
[0054] Correspondingly, when the target area is the rear area in the vehicle and the non-target area is the front area in the vehicle, the third speaker module 8 is arranged in the door area of the front area.
[0055] It should be noted that the working principles of the first power amplification module 2, the second power amplification module 7 and the third power amplification module 9 are the same, and the power amplification of the signals is performed by using the conventional technical means in the field, so the working principles of the first power amplification module 2, the second power amplification module 7 and the third power amplification module 9 will not be described in detail here; the second microphone module 5 is the same as the first microphone module 4; and the second loudspeaker module 6 is the same as the first loudspeaker module 3.
[0056] The utility model adopts the microphone (including the first microphone module 4 and the second microphone module 5) and the headrest loudspeaker (including the first loudspeaker module 3 and the second loudspeaker module 6) on the front and rear seat headrest of car to realize the most noise reduction function by emitting sound waves of different phases in front and back, and adopts the loudspeaker (namely the third loudspeaker module 8) on the front and rear doors as auxiliary noise reduction to obtain the best effect for each position.
[0057] The working principle of the in-vehicle sound field partition device will be further explained below through specific embodiments.
[0058] As shown in the figure, in an embodiment, the in-vehicle sound field partition device is used to realize front and rear privacy partition. Figure 2
[0059] Specifically, a first loudspeaker module 3 and a first microphone module 4 are arranged in the main driver seat area and the co-driver seat area respectively, and when the driver and the co-driver passenger talk, the first microphone module 4 in the main driver seat area is used to collect the voice of the main driver and the sound coming from the co-driver direction, and the first microphone module 4 in the co-driver seat area is used to collect the voice of the co-driver passenger and the sound coming from the main driver direction; correspondingly, the number of the first power amplification module 2 is two, and the two first power amplification modules 2 are connected with the first loudspeaker module 3 in the main driver seat area and the first loudspeaker module 3 in the co-driver seat area respectively.
[0060] Firstly, the two first microphone modules 4 send the collected sound (namely the first sound signal) to the audio processing module 1; then, after the audio processing module 1 processes (including amplification, inversion and delay), the first sound signal is sent to the two first power amplification modules 2 for amplification; finally, the first loudspeaker module 3 in the main driver seat area and the first loudspeaker module 3 in the co-driver seat area are driven to emit the inverted signal (namely the first inverted signal) of the main and co-driver talking sound signal, so as to offset the sound from the front row to the rear row, so that the passengers in the rear row cannot hear or clearly hear the conversation between the driver and the co-driver in the front row.
[0061] Firstly, the two first microphone modules 4 send the collected sound (namely the first sound signal) to the audio processing module 1; then, after the audio processing module 1 processes (including amplification, inversion and delay), the first sound signal is sent to the two first power amplification modules 2 for amplification; finally, the first loudspeaker module 3 in the main driver seat area and the first loudspeaker module 3 in the co-driver seat area are driven to emit the inverted signal (namely the first inverted signal) of the main and co-driver talking sound signal, so as to offset the sound from the front row to the rear row, so that the passengers in the rear row cannot hear or clearly hear the conversation between the driver and the co-driver in the front row.
[0062] A second microphone module 5 and a second speaker module 6 are arranged in each of the three second seat areas; correspondingly, the number of second power amplifier modules 7 is three, and the three second power amplifier modules 7 are connected with the second speaker modules 6 in the three second seat areas respectively.
[0063] Specifically, the second microphone module 5 in the three second seat areas serves as an auxiliary to detect the sound signal (i.e. the second sound signal) leaked from the front row and send it to the audio processing module 1 for processing (including amplification, inversion, and time delay), and then send it to the three second power amplifier modules 7 for amplification, so as to drive the second speaker modules 6 in the three second seat areas to work and emit the inverted signal (i.e. the second inverted signal) of the sound signal leaked from the front row, thereby further canceling the sound transmitted from the front row to the rear row.
[0064] Meanwhile, a third speaker module 8 is arranged in each of the two door areas of the rear row; correspondingly, the number of third power amplifier modules 9 is two, and the two third power amplifier modules 9 are connected with the third speaker modules 8 in the two door areas of the rear row respectively.
[0065] Specifically, after the sound signal leaked from the front row is processed by the audio processing module 1, it will also be sent to the two third power amplifier modules 9 for power amplification, and then the third speaker modules 8 in the two door areas of the rear row will play the inverted signal of the sound signal leaked from the front row, so as to further cancel the sound transmitted from the front row to the rear row.
[0066] In an embodiment, the utility model can also be used for the noise function of independent road noise reduction, wind dryness, engine noise, etc. transmitted from the outside to the vehicle interior. The principle is that the microphone (i.e. the target area is the vehicle interior area) on each seat position picks up the noise (corresponding to the first sound signal) transmitted from the outside, transmits the noise signal to the audio processing module 1 for adjustment of the amplitude, phase, and time delay of each speaker channel, and then sends it to each speaker power amplifier module (i.e. the first power amplifier module 2) for amplification, so as to drive the speaker (i.e. the first speaker module 3) to work. The principle is that the speaker (i.e. the third speaker module 3) on the door is responsible for primary noise reduction in a large range, and the speaker module in the first seat area is responsible for secondary auxiliary noise reduction, so that the noise reduction effect is better.
[0067] The description of the corresponding flow or structure of each of the above figures has its own emphasis, and the part not described in detail in a certain flow or structure can be referred to the related description of other flows or structures.
[0068] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.
Claims
1. An in-vehicle sound field partitioning apparatus characterized by comprising: The in-vehicle sound field partitioning device is used for sound field partitioning of a target area in a vehicle, and comprises an audio processing module and at least one first power amplifier module, at least one first loudspeaker module and at least one first microphone module. Each first microphone module corresponds to a first loudspeaker module and a first power amplifier module, and each first microphone module and the corresponding first loudspeaker module form a group and is arranged in a first seat area of the target area; the target area comprises at least one first seat area; the first microphone module is connected to the audio processing module; The audio processing module is connected to the first power amplifier module; The first power amplifier module is connected to the first loudspeaker module.
2. The in-vehicle sound field zoning apparatus according to claim 1, characterized by, The in-vehicle sound field partitioning device further comprises at least one second microphone module, at least one second loudspeaker module and at least one second power amplifier module. Each second microphone module corresponds to a second loudspeaker module and a second power amplifier module, and each second microphone module and the corresponding second loudspeaker module form a group and is arranged in a second seat area of a non-target area other than the target area; the non-target area comprises at least one second seat area; the second microphone module is connected to the audio processing module; The audio processing module is connected to the second power amplifier module; The second power amplifier module is connected to the second loudspeaker module.
3. The in-vehicle sound field zoning apparatus according to claim 2, characterized by, The in-vehicle sound field partitioning device further comprises at least one third loudspeaker module and at least one third power amplifier module; wherein, Each third loudspeaker module corresponds to a third power amplifier module, and the third loudspeaker module is arranged in a door area; the third loudspeaker module is connected to the third power amplifier module; The third power amplifier module is further connected to the audio processing module.
4. The in-vehicle sound field zoning apparatus of claim 1, wherein, Each first microphone module and / or each first loudspeaker module is arranged on a seat headrest of the first seat area.
5. The in-vehicle sound field zoning apparatus of claim 1, wherein, Each first loudspeaker module comprises at least one loudspeaker group; each loudspeaker group comprises two loudspeakers arranged back to back; The loudspeakers are connected to the first power amplifier module.
6. The in-vehicle sound field zoning apparatus of claim 1, wherein, Each first microphone module comprises at least one microphone. When the first microphone module comprises two microphones, the two microphones are arranged at a first position and a second position of a seat headrest of the first seat area; when an occupant sits on a seat of the first seat area, the first position and the second position are respectively located on both sides of the head of the occupant.
7. The in-vehicle sound field zoning apparatus of claim 1, wherein, The audio processing module adopts a digital signal processor.