Control method of sound device in vehicle, sound device system and vehicle

Abstract

The invention provides a control method of an audible device in a vehicle, an audible device system and the vehicle. A plurality of sound devices are arranged in the vehicle, and the control method comprises the steps that passenger information of passengers in the vehicle is obtained, and the passenger information comprises the ear positions of the passengers; determining a sound field center point according to the ear position of the passenger in the vehicle; according to the distance between each audible device and the central point of the sound field, determining the audio playing rule of each audible device; and according to the playing rule, controlling the sound devices to cooperatively produce sound, so that audios played by the sound devices simultaneously reach the central point of the sound field. In this way, automatic control over audio playing of the multiple sound devices can be achieved, and manual adjustment of a user is not needed. And the audio devices can be controlled to play audios according to the actual passenger information in the vehicle, the operation of the audio devices adapts to the actual passenger condition in the vehicle, the accuracy of control over the audio devices is improved, and therefore the listening experience of the passengers in the vehicle is optimized.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a control method for an audio device in a vehicle, an audio device system, and a vehicle. Background Art

[0002] At present, most common vehicles are equipped with audio devices, which can play audio according to the needs of users in the vehicle and provide entertainment for users on the basis of driving functions. In order to achieve a better listening experience, some vehicles are equipped with multiple audio devices in different positions, which are arranged in a way such as surrounding the seats in the vehicle. The multiple audio devices often start playing audio at the same time in response to the input command for starting to play. However, after multiple audio devices play audio at the same time, each audio is likely to reach the user's position at different times, causing the user to listen to multiple delayed audios, and the listening experience is not good. To solve this problem, users can only make manual adjustments and set delay parameters for each audio device. However, this method may not only cause poor adjustment effects due to inaccurate adjustment of parameters by users, but also cannot adapt to changes in occupants in the vehicle, resulting in the adjustment of the audio device not matching actual needs. The accuracy of the operation control of the audio device is low, and the listening effect of the occupants in the car is poor. Summary of the invention

[0003] The present application provides a control method for an audio device in a vehicle, an audio device system and a vehicle, so as to improve the accuracy of operation control of the audio device and optimize the listening experience when a plurality of audio devices at different positions are arranged in the vehicle.

[0004] The present application provides a method for controlling an audio device in a vehicle, wherein a plurality of audio devices are arranged in the vehicle, and the control method comprises: obtaining occupant information of an occupant in the vehicle, wherein the occupant information comprises an ear position of the occupant; determining a center point of a sound field according to the ear position of the occupant in the vehicle; determining a playback rule for audio played by each audio device according to a distance between each audio device and the center point of the sound field; and controlling each audio device to make a coordinated sound according to the playback rule so that the audio played by each audio device reaches the center point of the sound field at the same time.

[0005] In some embodiments, the ear position includes the left ear position and the right ear position, and determining the center point of the sound field according to the ear positions of the occupants in the vehicle includes: determining the midpoint of the line connecting the left ear position and the right ear position of each occupant as the listening center point of the corresponding occupant; and determining the center point of the sound field according to the listening center points of all occupants.

[0006] In some embodiments, the occupant information also includes the number of occupants in the vehicle; determining the center point of the sound field based on the listening center points of all occupants includes: determining the number of occupants in the vehicle; when the number of occupants in the vehicle is one, determining the listening center point of the occupant as the center point of the sound field; when the number of members in the vehicle is greater than one, determining the position point in the vehicle interior space where the sum of the distances to the listening center points of each occupant is the smallest as the center point of the sound field.

[0007] In some embodiments, occupant information of occupants in a vehicle is obtained, the occupant information including the ear position of the occupant, including: obtaining image information of the interior of the vehicle, and distance information between identification objects and identification points inside the vehicle; the identification objects include all vehicle interior components and occupants located inside the vehicle; based on the image information and distance information, three-dimensional modeling of the vehicle interior environment is performed to obtain a three-dimensional model of the vehicle interior environment; based on the three-dimensional model, the ear position of the occupant in the vehicle is determined.

[0008] In some embodiments, the playback rules include an audio delay duration, and the playback rules for each audio device to play the audio are determined based on the distance between each audio device and the center point of the sound field, including: marking the audio device farthest from the center point of the sound field as the initial audio device that plays the audio with an initial sequence number; determining the audio delay duration required for each of the remaining audio devices relative to the initial audio device; and controlling each audio device to sound in coordination according to the playback rules so that the audio played by each audio device reaches the center point of the sound field at the same time, including: controlling each audio device to sound in coordination according to the audio delay duration of each audio device so that the audio played by each audio device reaches the center point of the sound field at the same time.

[0009] In some embodiments, after determining the audio delay time required for each remaining audio device relative to the initial audio device, the method further includes: obtaining the obstacle distribution between each audio device and the center point of the sound field; and adjusting the audio delay time according to the obstacle distribution.

[0010] In some embodiments, adjusting the audio delay duration according to the obstacle distribution includes: recording the audio device with obstacles between it and the audio center point as the target audio device; if the target audio device is not the initial audio device, reducing the audio delay duration of the target audio device; if the target audio device is the initial audio device, increasing the audio delay duration of all other audio devices.

[0011] In some embodiments, the playback rules also include playback volume. The playback rules for each audio device to play audio are determined based on the distance between each audio device and the center point of the sound field, and also include: determining the playback volume of the initial audio device and the playback volume required for each remaining audio device relative to the initial audio device; wherein the playback volume of an audio device that is farther away from the center point of the sound field is greater than the playback volume of an audio device that is farther away from the center point of the sound field; and according to the playback rules, controlling each audio device to sound in coordination, including: controlling each audio device to sound in coordination based on the audio delay duration and playback volume of each audio device, so that the audio played by each audio device reaches the center point of the sound field at the same time and has the same volume level at the center point.

[0012] In some embodiments, the ear position includes the left ear position and the right ear position; controlling each audio device to make sound in coordination includes: when there is only one occupant in the vehicle, controlling the audio device on the side of the left ear position of the occupant in the vehicle to play the left channel audio, and controlling the audio device on the side of the right ear position of the occupant in the vehicle to play the right channel audio.

[0013] In some embodiments, before controlling each audio device to make sound in coordination, it also includes: determining the noise parameters of the center point of the sound field according to the noise parameters of at least two different positions in the vehicle; controlling each audio device to make sound in coordination includes: controlling each audio device to play audio with resistance to noise waves.

[0014] In some embodiments, the control method further includes: in the process of controlling the coordinated sounding of each audio device, when the occupant information of the occupant in the vehicle changes, redetermining the playback rules according to the changed occupant information.

[0015] The present application provides an audio device system, including one or more processors, and the processor is used to implement the above-mentioned control method of the audio device in the vehicle.

[0016] The present application provides a vehicle, comprising the above-mentioned audio device system.

[0017] The control method, audio device system and vehicle of the audio device in the vehicle provided by the present application determine the center point of the sound field according to the ear position of the occupant in the vehicle, and then determine the playback rules of each audio device according to the distance between each audio device and the center point of the sound field, so that the audio played by each audio device reaches the center point of the sound field at the same time. In this way, automatic control of the audio playback of multiple audio devices can be achieved without manual adjustment by the user. And it is possible to control the audio playback of each audio device according to the actual occupant information in the vehicle, and the operation of the audio device is adapted to the actual occupant situation in the vehicle, which is conducive to improving the accuracy of the control of the audio device, thereby optimizing the listening experience of the occupants in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a vehicle provided by an embodiment of the present application;

[0019] Figure 2 is a flow chart of a method for controlling an audio device in a vehicle provided by an embodiment of the present application;

[0020] Figure 3 is a flow chart of a method for controlling an audio device in a vehicle provided by another embodiment of the present application;

[0021] Figure 4 is a flow chart of a method for controlling an audio device in a vehicle provided by another embodiment of the present application;

[0022] Figure 5 is a flow chart of a method for controlling an audio device in a vehicle provided by another embodiment of the present application;

[0023] Figure 6 It is a flowchart of a method for controlling an audio device in a vehicle provided by another embodiment of the present application.

[0024] Reference numerals:

[0025] 10: vehicle; 100: audio device; 200: processor; 300: image sensor; 400: distance sensor. DETAILED DESCRIPTION

[0026] Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings.

[0027] Combination Figure 1 As shown, an embodiment of the present application provides a vehicle 10, in which a plurality of audio devices 100 are arranged. A processor 200 is also arranged in the vehicle 10, and is electrically connected to the audio device 100. The processor 200 and the audio device 100 together form an audio device system. The processor 200 is configured to execute the following method for controlling the audio device in the vehicle.

[0028] Combination Figure 2 As shown, the embodiment of the present application provides a method for controlling an audio device in a vehicle, which is executed when a plurality of audio devices are installed in the aforementioned vehicle. The control method includes steps S11 to S14.

[0029] Step S11, obtaining the occupant information of the occupant in the vehicle, the occupant information including the ear position of the occupant.

[0030] Step S12, determining the center point of the sound field according to the ear position of the vehicle occupant.

[0031] Step S13, determining a playing rule for each audio device to play audio according to the distance between each audio device and the center point of the sound field.

[0032] Step S14, according to the playing rule, control each audio device to make sound in coordination, so that the audio played by each audio device reaches the center point of the sound field at the same time.

[0033] By adopting the control method of the audio device in the vehicle provided in the embodiment of the present application, the center point of the sound field is determined according to the ear position of the occupant in the vehicle, and then the playback rules of each audio device are determined according to the distance between each audio device and the center point of the sound field, so that the audio played by each audio device reaches the center point of the sound field at the same time. In this way, automatic control of the audio playback of multiple audio devices can be achieved without manual adjustment by the user. In addition, the audio playback of each audio device can be controlled according to the actual occupant information in the vehicle, and the operation of the audio device is adapted to the actual occupant situation in the vehicle, which is conducive to improving the accuracy of the control of the audio device, thereby optimizing the listening experience of the occupants in the vehicle.

[0034] Here, the specific process of obtaining the occupant information of the members in the vehicle is explained. Figure 3 As shown, step 11 includes steps S111 to S113.

[0035] Step S111, obtaining image information of the interior of the vehicle and distance information between the identification object and the identification point inside the vehicle.

[0036] The identification objects include all vehicle interior components and passengers located inside the vehicle.

[0037] Here, combined Figure 1 As shown, the vehicle 10 is provided with an image sensor 300 for obtaining image information of the interior of the vehicle, and the image sensor 300 is electrically connected to the processor 200. In some embodiments, the image sensor 300 is one or more cameras. In addition, the vehicle 10 is provided with a distance sensor 400 for obtaining distance information between a marking object and a marking point inside the vehicle, and the distance sensor 400 is electrically connected to the processor 200. In some embodiments, the distance sensor 400 is one or more radar sensors. More specifically, in some embodiments, the distance sensor 400 is a millimeter wave radar sensor. In this way, the image information of the interior of the vehicle and the distance information between the marking object and the marking point can be obtained in real time.

[0038] Step S112, performing three-dimensional modeling of the vehicle interior environment according to the image information and the distance information to obtain a three-dimensional model of the vehicle interior environment.

[0039] Step S113, determining the ear position of the occupant in the vehicle according to the three-dimensional model.

[0040] The ear shape can be directly identified through the three-dimensional model to determine the ear position, or the ear position can be determined based on the relationship between the human body and the ear position after the human body is identified through the three-dimensional model.

[0041] In some embodiments, the ear position includes a left ear position and a right ear position. It should be noted that, when there are multiple passengers in the vehicle, the correspondence between the passengers and the ear positions needs to be identified to determine the left ear position and the right ear position corresponding to each passenger.

[0042] In some embodiments, determining the center point of the sound field according to the ear position of the occupant in the vehicle includes: determining the midpoint of the line connecting the left ear position and the right ear position of each occupant as the listening center point of the corresponding occupant; determining the center point of the sound field according to the listening center points of all occupants. For a single occupant, the situation where all audio arrives at the listening center point at the same time can reduce the listening difference between the left ear and the right ear, providing the user with a better listening experience. Therefore, after determining the midpoint of the line connecting the left ear position and the right ear position as the listening center point, determining the center point of the sound field based on this is conducive to optimizing the final listening effect.

[0043] In some embodiments, the passenger information also includes the number of passengers in the vehicle; determining the sound field center point according to the listening center points of all passengers includes: determining the number of passengers in the vehicle; when the number of passengers in the vehicle is one, determining the listening center point of the passenger as the sound field center point; when the number of members in the vehicle is greater than one, determining the position point in the vehicle interior space where the sum of the distances to the listening center points of each passenger is the smallest as the sound field center point. Among them, the number of passengers in the vehicle can be obtained by seat pressure sensing, direct user input, etc. Alternatively, it can be determined by the aforementioned three-dimensional model. In the case of multiple passengers, directly using the listening center point of one of them as the sound field center point will cause the sound field center point to deviate from the listening center points corresponding to other passengers to a large extent, causing a greater impact on the listening experience of other passengers. Therefore, after distinguishing the situation according to the number of passengers, the center of all listening center points is used as the sound field center point to take into account the listening experience of all passengers as much as possible and optimize the listening effect of all passengers. In addition, the point with the smallest distance from all listening center points is used as the center point, which can ensure that the final center point will not be too far away from the listening center point of a certain passenger, and has the effect of taking into account the listening experience of all passengers.

[0044] It should be noted that during the implementation process, there may be multiple locations with the minimum distance from all listening points. In this case, on the basis of meeting the minimum distance condition, the location closest to each passenger is selected as the sound field center point to achieve a balanced listening experience for each passenger.

[0045] Here, combined Figure 4 An embodiment is provided to illustrate the process of determining the center point of the sound field according to the ear position of the occupant in the vehicle, that is, the aforementioned step S12 includes steps S121 to S126.

[0046] Step S121: determine the midpoint of the line connecting the left ear position and the right ear position of each occupant as the listening center point of the corresponding occupant.

[0047] Step S122, determining the number of occupants in the vehicle.

[0048] Step S123, determining whether the number of passengers is one.

[0049] If yes, execute step S124; if no, execute step S125.

[0050] Step S124: determine the passenger's listening center point as the sound field center point.

[0051] Step S125, determining whether the number of passengers is greater than one.

[0052] If yes, execute step S126.

[0053] Step S126, determining the position point in the vehicle interior space where the sum of the distances to the listening center points of the occupants is the smallest as the sound field center point.

[0054] In the implementation process, the process of determining the number of passengers is not limited to this embodiment, and ultimately different situations in which the number of passengers is one or more can be distinguished.

[0055] In some embodiments, the playback rule includes the audio delay duration. Figure 5 As shown, the embodiment of the present application provides another method for controlling an audio device in a vehicle, including steps S21 to S25.

[0056] Step S21, obtaining the occupant information of the occupant in the vehicle, wherein the occupant information includes the ear position of the occupant.

[0057] Step S22, determining the center point of the sound field according to the ear position of the occupant in the vehicle.

[0058] Step S23: Mark the audio device farthest from the center point of the sound field as the initial audio device that plays audio with an initial sequence number.

[0059] The distances between each audio device and the center point of the sound field are obtained, and the obtained multiple distances are sorted to determine the audio device farthest from the center point of the sound field.

[0060] The initial audio device is an audio device that first starts playing audio after the occupant inputs a command to play audio.

[0061] Step S24: determining the audio delay time required by each remaining audio device relative to the initial audio device.

[0062] The propagation time required for each audio device to reach the audio center point can be determined based on the distance between the audio device and the center of the sound field and the propagation of the audio. The propagation time corresponding to the initial audio device is compared with the propagation time corresponding to each remaining audio device to determine the audio delay time required for each remaining audio device relative to the initial audio device.

[0063] Step S25 , controlling each audio device to produce sound in coordination according to the audio delay time of each audio device, so that the audio played by each audio device reaches the center point of the sound field at the same time.

[0064] That is, after the initial audio device starts playing audio, the remaining audio devices are controlled to start playing audio according to their respective audio delay durations. In this way, the audio played by each audio device reaches the center point of the sound field at the same time.

[0065] It is understandable that in the implementation process, there may be a situation where the distances between the center point of the sound field and all the audio devices are the same. In this case, all the audio devices can be controlled to start playing audio at the same time.

[0066] In some embodiments, after determining the audio delay time required for each remaining audio device relative to the initial audio device, it also includes: obtaining the distribution of obstacles between each audio device and the center point of the sound field; adjusting the audio delay time according to the obstacle distribution. Considering that the space in the vehicle is relatively small, obstacles such as the seat back of the vehicle are relatively large relative to the space in the vehicle, which will have a certain impact on the propagation of sound in the vehicle. In the case of obstacles, the audio delay time calculated based on the straight-line distance between the center point of the sound field and the audio device may not accurately reflect the time required for the audio to actually reach the center point of the sound field. Therefore, adjusting the audio delay time according to the distribution of obstacles is conducive to further improving the accuracy of the audio delay market, that is, optimizing the accuracy of the control of the audio device. Among them, the obstacle distribution between each audio device and the center point of the sound field is the obstacle distribution on the propagation path of the audio played by the audio device to the center point of the sound field. The obstacle includes, for example, the vehicle seat back, the inner baffle of the vehicle and other vehicle parts that affect the propagation of audio, and the luggage of the passengers. In some embodiments, the position of the passenger may be between the center point of the sound field and the audio device, which affects the propagation of the audio. In this case, the passenger can be used as an obstacle.

[0067] Specifically, in some embodiments, adjusting the audio delay duration according to the obstacle distribution includes: recording the audio device with obstacles between it and the audio center point as the target audio device. If the target audio device is not the initial audio device, the audio delay duration of the target audio device is reduced; if the target audio device is the initial audio device, the audio delay duration of all other audio devices is increased. If there are obstacles between the audio device and the center point of the sound field, the obstacles hinder the propagation of the audio to a certain extent, so it is necessary to control the audio device to play the audio in advance appropriately to make up for the time lost due to the obstacle. When the control logic of controlling the audio device to play the audio in advance is specifically implemented, it is necessary to judge whether the target audio device is the initial audio device that plays the audio first. If the target audio device is the initial audio device, the target audio device is already the audio device that plays the audio first and cannot play it in advance. Therefore, the audio of the target audio device is played relatively in advance by increasing the audio delay duration of all other audio devices, so that the audio played by each audio device reaches the center point of the sound field at a closer time. If the target audio device is not the initial audio device, the audio delay duration of the target audio device is directly reduced. When there are multiple target acoustic devices, adjustments may be performed sequentially corresponding to the respective target acoustic devices.

[0068] Furthermore, a correspondence between common obstacle types and adjustment durations can be set. The adjustment duration is determined according to the obstacle type between the current target audio device and the center point of the sound field, and the audio delay duration of the target audio device is reduced or the delay duration of all other audio devices is increased by the adjustment duration.

[0069] In some embodiments, the play rule also includes the play volume. Figure 6 As shown, the embodiment of the present application provides another method for controlling an audio device in a vehicle, including steps S31 to S36.

[0070] Step S31, obtaining the occupant information of the occupant in the vehicle, the occupant information including the ear position of the occupant.

[0071] Step S32, determining the center point of the sound field according to the ear position of the vehicle occupant.

[0072] Step S33: Mark the audio device farthest from the center point of the sound field as the initial audio device that plays audio with an initial sequence number.

[0073] Step S34, determining the audio delay time required by each remaining audio device relative to the initial audio device.

[0074] Step S35 , determining the playback volume of the initial audio device and the required playback volumes of the remaining audio devices relative to the initial audio device.

[0075] The playback volume of the audio device that is at a greater distance from the center point of the sound field is greater than the playback volume of the audio device that is at a smaller distance from the center point of the sound field.

[0076] Step S36, according to the audio delay time and the playing volume of each audio device, control each audio device to make a coordinated sound, so that the audio played by each audio device reaches the center point of the sound field at the same time and the volume level at the center point is the same.

[0077] In this way, it can avoid the situation where the volume of the audio device closer to the center of the sound field is too loud, while the volume of the audio device closer to the center of the sound field is too low, resulting in a large difference in the volume of the audio when reaching the center of the sound field, which is conducive to optimizing the user's listening experience.

[0078] Among them, step S34 and step S35 can be performed simultaneously, or any one of them can be performed preferentially. The execution order of step S34 and step S35 is not limited here.

[0079] In some embodiments, the ear position includes the left ear position and the right ear position. Controlling each audio device to produce sound in coordination includes: when there is only one occupant in the vehicle, controlling the audio device on the side where the left ear of the occupant is located in the vehicle to play the left channel audio, and controlling the audio device on the side where the right ear of the occupant is located in the vehicle to play the right channel audio. In this way, if the direction of the occupant changes, the audio played by each audio device will also change accordingly. The playback of the left channel audio and the right channel audio can be controlled according to the current actual direction of the occupant to ensure that the playback of the left channel audio and the right channel audio is consistent with the actual listening needs of the occupant, which is conducive to optimizing the user's listening experience.

[0080] In some embodiments, before controlling each audio device to make a sound in coordination, the method further includes: determining the noise parameter of the center point of the sound field according to the noise parameters of at least two different positions in the vehicle. Controlling each audio device to make a sound in coordination includes: controlling each audio device to play audio with anti-noise waves. In some embodiments, the noise parameters include phase, frequency and amplitude.

[0081] At this time, it is equivalent to entering the active anti-noise mode of the vehicle. Multiple noise monitoring devices are arranged in the vehicle, and the multiple noise monitoring devices are arranged at least in two different positions to monitor the noise parameters at their positions. After the noise parameters are monitored, the noise parameters of the center point of the sound field are calculated according to the noise parameters of the position point where the noise parameters are known. The calculation process can be carried out by sound field simulation, attenuation law calculation, etc. The anti-noise wave is determined based on the noise parameters of the center point of the sound field finally calculated, and each audio device is controlled to play the audio with the anti-noise wave. In this way, considering that the noise inside the vehicle may be unevenly distributed, it is avoided to perform anti-noise based on the noise parameters monitored at a certain place or a certain part of the vehicle, resulting in a large difference between the anti-noise process and the actual anti-noise demand. Noise reduction based on the noise parameters of the center point of the sound field can take into account the anti-noise effect of all occupants in the car to the greatest extent, which is conducive to optimizing the passenger experience. Furthermore, during the playback process, each audio device can also be feedback-adjusted according to the actual anti-noise situation, so as to further optimize the anti-noise effect.

[0082] In some embodiments, the control method of the audio device in the vehicle further includes: in the process of controlling the coordinated sounding of each audio device, when the occupant information of the occupant in the vehicle changes, re-determining the playing rules according to the changed occupant information. In this way, re-determining the playing rules when the occupant information changes can timely adapt to the update of the passenger's listening needs, which is conducive to further improving the accuracy of the audio device control.

[0083] Furthermore, in some embodiments, when the passenger information of the passengers in the vehicle changes, the playback rules are redetermined according to the changed passenger information, including: when the number information of the passengers in the vehicle changes, the playback rules are redetermined according to the changed passenger information. In some embodiments, the passenger information includes the position and movement distance of the passenger in the process of controlling the coordinated sound of each audio device. When the passenger information of the passengers in the vehicle changes, the playback rules are redetermined according to the changed passenger information, including: when the position of the passenger in the vehicle changes and the movement distance is greater than the set distance, the playback rules are redetermined according to the changed passenger information. In this way, the triggering conditions for redetermining the playback rules are further limited to avoid the situation where the change in the passenger's listening needs is too small to trigger the process of redetermining the playback rules, which is conducive to saving unnecessary calculation processes and thus saving computing power.

[0084] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

Claims

1. A method for controlling an audio device in a vehicle, characterized in that: The vehicle is provided with a plurality of audio devices, and the control method comprises: Obtaining occupant information of an occupant in the vehicle, the occupant information including an ear position of the occupant; Determining the center point of the sound field according to the ear position of the occupant in the vehicle; Determining a playing rule for each audio device to play audio according to the distance between each audio device and the center point of the sound field; According to the playing rule, each audio device is controlled to produce sound in coordination, so that the audio played by each audio device reaches the center point of the sound field at the same time.

2. The control method according to claim 1, characterized in that: The ear positions include a left ear position and a right ear position, and determining the center point of the sound field according to the ear positions of the occupant in the vehicle includes: Determine the midpoint of the line connecting the left ear position and the right ear position of each occupant as the listening center point of the corresponding occupant; The sound field center point is determined according to the listening center points of all the passengers.

3. The control method according to claim 2, characterized in that: The passenger information also includes the number of passengers in the vehicle; and determining the sound field center point according to the listening center points of all the passengers includes: determining the number of occupants in the vehicle; When the number of passengers in the vehicle is one, determining the listening center point of the passenger as the center point of the sound field; When the number of passengers in the vehicle is greater than one, the position point in the vehicle interior space where the sum of distances to the listening center points of the passengers is the smallest is determined as the sound field center point.

4. The control method according to claim 2, characterized in that: Obtaining occupant information of an occupant in the vehicle, wherein the occupant information includes an ear position of the occupant, comprising: Obtaining image information of the interior of the vehicle and distance information between a marking object and a marking point inside the vehicle; the marking object includes all vehicle interior components and passengers located inside the vehicle; Performing three-dimensional modeling of the vehicle interior environment according to the image information and the distance information to obtain a three-dimensional model of the vehicle interior environment; The ear position of the occupant in the vehicle is determined based on the three-dimensional model.

5. The control method according to claim 1, characterized in that: The playing rule includes the audio delay time, and the playing rule for each audio device to play the audio is determined according to the distance between each audio device and the center point of the sound field, including: Marking the audio device farthest from the center point of the sound field as the initial audio device for playing audio with an initial sequence number; Determining the audio delay duration required for each remaining audio device relative to the initial audio device; According to the playing rule, controlling each audio device to produce sound in coordination so that the audio played by each audio device reaches the center point of the sound field at the same time includes: According to the audio delay time of each audio device, each audio device is controlled to produce sound in coordination, so that the audio played by each audio device reaches the center point of the sound field at the same time.

6. The control method according to claim 5, characterized in that: After determining the audio delay time required for each remaining audio device relative to the initial audio device, the method further includes: Obtaining the distribution of obstacles between each audio device and the center point of the sound field; The audio delay duration is adjusted according to the obstacle distribution.

7. The control method according to claim 6, characterized in that: The adjusting the audio delay duration according to the obstacle distribution includes: Recording the sound device with obstacles between it and the sound center point as the target sound device; If the target audio device is not the initial audio device, reducing the audio delay time of the target audio device; If the target audio device is the initial audio device, the audio delay durations of all other audio devices are increased.

8. The control method according to claim 5, characterized in that: The playing rule also includes a playing volume, and the playing rule for each audio device to play audio according to the distance between each audio device and the center point of the sound field also includes: Determine the playback volume of the initial audio device and the required playback volume of each remaining audio device relative to the initial audio device; wherein the playback volume of the audio device that is farther away from the center point of the sound field is greater than the playback volume of the audio device that is shorter away from the center point of the sound field; The controlling each audio device to produce sound in coordination according to the playing rule includes: According to the audio delay duration and playing volume of each audio device, each audio device is controlled to produce sound in coordination, so that the audio played by each audio device reaches the center point of the sound field at the same time and has the same volume level at the center point.

9. The control method according to claim 1, characterized in that: The ear position includes a left ear position and a right ear position; The controlling of the various sound devices to produce sound in coordination includes: When there is only one occupant in the vehicle, the audio device located at the side of the left ear of the occupant in the vehicle is controlled to play the left channel audio, and the audio device located at the side of the right ear of the occupant in the vehicle is controlled to play the right channel audio.

10. The control method according to claim 1, characterized in that: Before controlling each audio device to produce sound in coordination, the method further includes: determining the noise parameter of the center point of the sound field according to the noise parameters of at least two different positions in the vehicle; Controlling each audio device to produce sound in coordination includes: controlling each audio device to play audio with noise immunity.

11. The control method according to any one of claims 1 to 10, characterized in that: Also includes: In the process of controlling the coordinated sounding of each audio device, when the occupant information of the occupant in the vehicle changes, the playing rule is re-determined according to the changed occupant information.

12. An audio device system, characterized in that: The invention comprises a plurality of audio devices and one or more processors, wherein the processors are used to implement the control method of the audio device in a vehicle according to any one of claims 1 to 11.

13. A vehicle, characterized in that: Comprising the audio device system as claimed in claim 12.

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