Vehicle cabin sound control method and device and vehicle

Abstract

The application discloses a sound control method and device for a vehicle cabin and a vehicle. The method comprises the following steps: acquiring a first sound signal emitted by a first occupant in the vehicle, and acquiring position information of a second occupant in the vehicle; determining a second sound signal based on the first sound signal, the position information of the second occupant and position information of a first sound playing device in the vehicle; controlling the first sound playing device to output the second sound signal, so that the first sound signal and the second sound signal interfere with each other when propagating to a position where the second occupant is located, and the sound loudness at the position where the second occupant is located is less than a preset loudness threshold. The application solves the technical problem of low conversation privacy in the vehicle cabin.

Description

Technical Field

[0001] This invention belongs to the field of noise reduction technology, and particularly relates to a method, device and vehicle for controlling the sound of a vehicle cabin. Background Technology

[0002] In business settings, conversations between passengers in the back seat of a vehicle can easily be overheard by the driver, potentially leading to the leakage of confidential information.

[0003] In existing technologies, adding a partition inside the vehicle cabin can prevent the driver from hearing conversations between passengers in the back seat. However, the effect is not ideal, as the driver can still clearly hear the conversations, resulting in low privacy for conversations inside the vehicle cabin. Summary of the Invention

[0004] This invention provides a method, device, and vehicle for controlling the sound in a vehicle cabin, which solves the technical problem of low privacy during conversations inside a vehicle cabin.

[0005] In a first aspect, embodiments of the present invention provide a sound control method for a vehicle cabin, comprising: acquiring a first sound signal emitted by a first occupant in the vehicle, and acquiring position information of a second occupant in the vehicle; determining a second sound signal based on the first sound signal, the position information of the second occupant, and the position information of a first sound playback device in the vehicle; and controlling the first sound playback device to output the second sound signal so that the first sound signal and the second sound signal interfere when propagating to the location of the second occupant, so that the sound loudness at the location of the second occupant is less than a preset loudness threshold.

[0006] In conjunction with the first aspect of the present invention, in some embodiments, a first sound acquisition device is provided in a first cabin location inside the vehicle, the first cabin location being the location of the first occupant; acquiring the first sound signal emitted by the first occupant inside the vehicle includes: acquiring the first sound signal through the first sound acquisition device.

[0007] In conjunction with the first aspect of the present invention, in some embodiments, the first cabin position is a space area located above at least one rear seat in the vehicle, and the second occupant position information is the position information of the driver's head.

[0008] In conjunction with the first aspect of the present invention, in some embodiments, the driver wears a wearable device on his head, and the wearable device is equipped with a gyroscope; obtaining the position information of the second occupant in the vehicle includes: obtaining motion data from the gyroscope; and determining the position information of the driver's head based on the motion data from the gyroscope.

[0009] In conjunction with the first aspect of the present invention, in some embodiments, a camera is provided on the center console of the vehicle; the step of obtaining the position information of the second occupant in the vehicle includes: obtaining a driver image captured by the camera; and determining the position information of the driver's head based on the driver image.

[0010] In conjunction with the first aspect of the present invention, in some embodiments, determining the second sound signal based on the first sound signal, the location information of the second occupant, and the location information of the first sound playback device in the vehicle includes: inputting the first sound signal, the location information of the second occupant, and the location information of the first sound playback device in the vehicle into a target signal generation model to obtain the second sound signal.

[0011] In conjunction with the first aspect of the present invention, in some embodiments, the target signal generation model is established in advance through the following steps: controlling a second sound playback device to play sound, and controlling a first sound acquisition device to acquire the sound from the second sound playback device to obtain a third sound signal, wherein the second sound playback device and the first sound acquisition device are located at the first cockpit position; inputting the third sound signal into a preset first-level path transfer function to obtain a fourth sound signal, wherein the fourth sound signal is the actual sound signal after the third sound signal has changed when it propagates to the second cockpit position, wherein the second cockpit position is the position of the second occupant; inputting the third sound signal, the second cockpit position, and the position information of the first sound playback device into an initial signal generation model to obtain a fifth sound signal; determining the signal error between the fourth sound signal and the fifth sound signal; and iteratively optimizing the initial signal generation model based on the signal error to obtain the target signal generation model.

[0012] In conjunction with the first aspect of the present invention, in some embodiments, the initial signal generation model includes a phase inversion function and a second-level path transfer function; the step of inputting the third sound signal, the second cockpit position, and the position information of the first sound playback device into the initial signal generation model to obtain a fifth sound signal includes: inputting the third sound signal into the phase inversion function to obtain a sixth sound signal; and inputting the sixth sound signal into the second-level path transfer function to obtain the fifth sound signal, wherein the position-related parameters of the second-level path transfer function are determined based on the position information of the second cockpit position and the first sound playback device.

[0013] Secondly, embodiments of the present invention provide a sound control device for a vehicle cabin, comprising: a data acquisition unit, configured to acquire a first sound signal emitted by a first occupant in the vehicle, and to acquire position information of a second occupant in the vehicle; a signal determination unit, configured to determine a second sound signal based on the first sound signal, the position information of the second occupant, and the position information of a first sound playback device in the vehicle; and a sound control unit, configured to control the first sound playback device to output the second sound signal, such that the first sound signal and the second sound signal interfere when propagating to the location of the second occupant, so that the sound loudness at the location of the second occupant is less than a preset loudness threshold.

[0014] Thirdly, embodiments of the present invention provide a vehicle, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method described in any of the first aspects.

[0015] The one or more technical solutions provided in the embodiments of the present invention achieve at least the following technical effects or advantages:

[0016] This invention acquires a first sound signal emitted by a first occupant inside the vehicle and the location information of a second occupant. Based on the first sound signal, the location information of the second occupant, and the location information of a first sound playback device inside the vehicle, a second sound signal is determined. The first sound playback device is then controlled to output the second sound signal, causing interference between the first and second sound signals when they reach the location of the second occupant, resulting in a sound loudness at the second occupant's location being less than a preset loudness threshold. A sound loudness at the second occupant's location being less than the preset loudness threshold indicates that, due to sound interference, the loudness of the first sound signal emitted by the first occupant has been reduced to a small value when it reaches the second occupant's location, and the second occupant cannot clearly hear the conversation. Therefore, the privacy of conversations inside the vehicle cabin is improved. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a flowchart of the vehicle cabin sound control method in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the in-vehicle acoustic shield system device in an embodiment of the present invention;

[0020] Figure 3 This is a technical roadmap of the in-vehicle acoustic shield system device in an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the signal detection of the in-vehicle acoustic shield system device in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram illustrating the noise reduction principle of the in-vehicle sound shield system device in an embodiment of the present invention;

[0023] Figure 6 This is a functional block diagram of the sound control device in the vehicle cabin in an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the vehicle structure in an embodiment of the present invention. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] In this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0027] This invention provides a method for controlling the sound of a vehicle cabin, as described in the following embodiments. Figure 1 As shown, the method includes the following steps S101 to S103:

[0028] S101: Obtain the first sound signal emitted by the first occupant inside the vehicle, and obtain the location information of the second occupant inside the vehicle.

[0029] It should be noted that the first passenger can be a rear passenger, and the second passenger can be a front passenger. Specifically, the front passenger can be the driver or the front front passenger. Alternatively, the first passenger can be a front passenger, and the second passenger can be a rear passenger. Furthermore, the first passenger can be the front front passenger, and the second passenger can be the driver.

[0030] In some embodiments, a first sound acquisition device is provided in the first cabin position inside the vehicle, where the first cabin position is the location of the first occupant; acquiring the first sound signal emitted by the first occupant inside the vehicle may include: acquiring the first sound signal through the first sound acquisition device.

[0031] It should be noted that a second sound recording device can be installed in the second cockpit of the vehicle, which is the location of the second occupant.

[0032] In some implementations, the first cockpit location may be a space area located above at least one rear seat in the vehicle, and the second occupant's location information may be the location information of the driver's head position.

[0033] In some implementations, the driver wears a wearable device on his head, and the wearable device is equipped with a gyroscope; obtaining the position information of the second occupant in the vehicle may include: obtaining motion data from the gyroscope; and determining the position information of the driver's head based on the motion data from the gyroscope.

[0034] It should be noted that the driver's head position is determined based on the motion data from the gyroscope, avoiding the need to determine the head position through a camera. This eliminates the need for taking photos or videos, prevents the recording of the occupants' physical characteristics, and avoids the eavesdropping on their conversations, thus protecting the occupants' privacy.

[0035] In some implementations, determining the position information of the driver's head based on the motion data of the gyroscope can be: determining the first relative position of the driver's head and the driver's seat based on the motion data of the gyroscope; and determining the position information of the driver's head based on the first relative position and the position of the driver's seat.

[0036] In some implementations, a camera is installed on the center console of the vehicle; obtaining the position information of the second occupant inside the vehicle may include: acquiring an image of the driver captured by the camera; and determining the position information of the driver's head based on the image of the driver.

[0037] It should be noted that when determining the position of the driver's head using the camera on the center console, the camera is positioned at a considerable distance from the driver, so it will not interfere with the driver's driving and thus improves driving safety.

[0038] In some implementations, a rangefinder is installed on the driver's seat of the vehicle; obtaining the position information of the second occupant in the vehicle may include: obtaining the detection distance of the rangefinder, the detection distance being the distance between the driver's head and the driver's seat; and determining the position information of the driver's head based on the detection distance and the position of the driver's seat.

[0039] It should be noted that the distance between the driver's head and the driver's seat is detected directly by the rangefinder, without the need for complex data calculations, thus reducing the complexity of the function.

[0040] S102: Determine the second sound signal based on the first sound signal, the location information of the second occupant, and the location information of the first sound playback device inside the vehicle.

[0041] In some implementations, determining the second sound signal based on the first sound signal, the location information of the second occupant, and the location information of the first sound playback device in the vehicle may include: inputting the first sound signal, the location information of the second occupant, and the location information of the first sound playback device in the vehicle into a target signal generation model to obtain the second sound signal.

[0042] In some implementations, the target signal generation model is established in advance through the following steps, including steps S1021 to S1025:

[0043] S1021: Control the second sound playback device to play sound, and control the first sound acquisition device to acquire the sound from the second sound playback device to obtain a third sound signal. The second sound playback device and the first sound acquisition device are located in the first cockpit position.

[0044] It should be noted that the second audio playback device was located in the first cockpit and was used to simulate the conversation of the first passenger during testing.

[0045] S1022: Input the third sound signal into the preset first-level path transfer function to obtain the fourth sound signal. The fourth sound signal is the actual sound signal after the third sound signal changes when it propagates to the second cockpit position. The second cockpit position is the position of the second occupant.

[0046] S1023: Input the third sound signal, the second cockpit position, and the position information of the first sound playback device into the initial signal generation model to obtain the fifth sound signal.

[0047] In some implementations, the initial signal generation model includes a phase inversion function and a second-level path transfer function; inputting the third audio signal, the second cockpit position, and the position information of the first audio playback device into the initial signal generation model to obtain the fifth audio signal may include: inputting the third audio signal into the phase inversion function to obtain the sixth audio signal; inputting the sixth audio signal into the second-level path transfer function to obtain the fifth audio signal, wherein the position-related parameters of the second-level path transfer function are determined based on the position information of the second cockpit and the first audio playback device.

[0048] S1024: Determine the signal error between the fourth and fifth audio signals.

[0049] S1025: Based on the signal error, iteratively optimize the initial signal generation model to obtain the target signal generation model.

[0050] In some implementations, the initial signal generation model is iteratively optimized based on the signal error to obtain the target signal generation model. This can be achieved by iteratively optimizing the initial signal generation model based on the signal error using the least mean square of the FxLMS (Filtrated-X Least Mean Square) algorithm to obtain the target signal generation model.

[0051] It should be noted that the FxLMS algorithm is an active noise control algorithm based on the Least Mean Square Error (LMS) criterion, which suppresses noise signals by establishing an adaptive filter. The FxLMS algorithm improves upon the LMS algorithm by considering the impact of secondary acoustic channels on the active noise control system. The FxLMS algorithm is relatively simple to implement and has a low computational load. Because it considers the influence of secondary acoustic channels, it can improve the sound suppression effect to a certain extent. Therefore, by iteratively optimizing the target signal generation model using the FxLMS algorithm, the accuracy of the target signal generation model is improved, achieving a balance between reducing computational load and improving sound suppression performance.

[0052] S103: Control the first sound playback device to output a second sound signal so that the first sound signal and the second sound signal interfere when they propagate to the location of the second occupant, so that the sound loudness at the location of the second occupant is less than a preset loudness threshold.

[0053] It should be noted that due to the limited space inside the vehicle, it is not ideal for families with young children to ride around in the car.

[0054] A noisy, bustling environment can easily distract drivers, hindering their ability to concentrate on traffic decisions and compromising driving safety. In business settings, conversations among important passengers in the back seat can easily be overheard by the driver, potentially leading to leaks of confidential information. Therefore, eliminating unwanted noise from back-seat occupants is a pressing technical challenge in automotive development. This invention provides an effective in-vehicle noise reduction technology. Based on the hardware and algorithms of an active noise cancellation system, it employs a secondary channel noise reduction method to prevent the front-seat driver from hearing conversations from rear-seat passengers, thus protecting rear-seat privacy and improving driver focus. The purpose of this invention is to eliminate unwanted conversations from rear-seat passengers in a noise-reducing environment. The hardware system, based on existing vehicle active noise cancellation systems, includes an error microphone, an active noise cancellation controller, and an audio system to perform real-time noise reduction of rear-seat occupant voices. This system can consist of sound recognition, a controller algorithm, and a secondary channel sound generation system.

[0055] It should be noted that, based on embodiments of the present invention, an in-vehicle sound shield system device for active noise cancellation can be obtained, including a microphone array consisting of several uniformly linearly arranged microphones, which can collect noise signals from the front and rear rows and provide feedback to the controller; a data acquisition and processing system, including a time delay estimation module, a time delay compensation module, and an adaptive filtering module, thereby calculating an inverse phase noise signal based on a reference signal and an error signal; and an execution system, generally a loudspeaker, used to output secondary sound signals, such as... Figure 2 As shown, Figure 2This is a schematic diagram of the in-vehicle sound shield system device in an embodiment of the present invention. The microphone can be placed near the occupant's head, not limited to the headrest, ceiling, or window positions. The speaker can be an in-vehicle speaker, preferably a headrest speaker, but not limited to door speakers. The following describes the setup steps of the in-vehicle sound shield system device: Step 1, connect these devices using wires, including a power line connecting the controller and the power supply, an A2B bus connecting the microphone and the controller, and an audio line connecting the controller and the speaker. Step 2, offline identification of additional noise in the secondary path uses the Least Mean Square (LMS) algorithm. The specific identification process is as follows, which needs to be conducted in a semi-anechoic chamber with the doors and windows closed, the test vehicle powered off, and the test personnel inside the vehicle remaining quiet. Step 3, control the secondary sound sources (such as headrest speakers) at different locations to emit additional noise a(n) (a sweep frequency signal covering human voice frequencies). Step 4, continuously adjust the filter weight coefficients by adjusting the FxLMS module, so that the output signal continuously approaches the desired signal until the residual error signal approaches zero, finally obtaining the FIR filter coefficients of the secondary channel. Step 5: The signal d(n) after a(n) passes through the first-stage path transfer function P(z) is acquired and saved by the error microphone as the desired signal for adaptive modeling. Step 6: The reference signal a(n) passes through the weight coefficients W(z) of the active road noise controller to obtain the output canceled noise signal u(n). Step 7: Based on the characteristics of the in-vehicle secondary channel transfer function, the noise signal u(n) is transformed into the filter output noise-reduced signal y(n) at time n through the second-stage path transfer function S(z). The method for calculating the secondary noise at the error microphone is as follows: Formula (1). Where x(ni) is the random reference signal at time ni. Let be the transfer function of the secondary path at time n. Step 8: The microphone is placed near the ears of the driver and passengers to monitor the error between the output signal y(n) and the desired signal d(n). The method for calculating the error signal e(n) is given by formula (2). Step 9: Using the FxLMS algorithm with the minimum mean square as the criterion, the algorithm iterates according to the principle of the steepest descent method. The data processing system continuously optimizes the adaptive modeling parameters based on the residual signal, according to formula (3), where Let x(n) be the secondary path transfer function at time n+1, x(n) be the random reference signal at time n, and u be the step size optimization coefficient. Step 10: Repeat steps 7 to 9. When e(n) is sufficiently small, the identification effect is good, and the relationship in equation (4) holds. Its complete technical route is as follows: Figure 3 As shown, Figure 3This is a technical roadmap of the in-vehicle sound shield system device in this embodiment of the invention. Step 11: When the sound shield system is working, the microphone sensor collects the surrounding sound field environment, automatically generates a desired signal d(n) based on the a(n) signal, and then, based on the secondary path transfer function, identifies the error between its output signal y(n) and the desired signal d(n) through the microphone. This error is then iteratively processed using the FxLMS algorithm based on the steepest descent method. This allows the sound field to automatically adjust under different scenarios, achieving the optimal effect of front-row noise reduction. (Refer to...) Figure 4 As shown, Figure 4 This is a schematic diagram of signal detection for the in-vehicle sound shield system device in an embodiment of the present invention. Step 12: The speaker system can be a vehicle audio system. Depending on the different sound field environments inside the vehicle, it emits different secondary sound sources that interfere with the sound waves in the canceled area, forming a sound cancellation zone, thereby achieving a sound shield effect. (Refer to...) Figure 5 As shown, Figure 5 This is a schematic diagram illustrating the noise reduction principle of the in-vehicle sound shield system in an embodiment of the present invention.

[0056]

[0057] e(n)=d(n)-y(n) (2)

[0058]

[0059] It should be noted that before the rear-seat audio waves reach the ears, a microphone detects ambient noise, transmits the noise signal to the control circuit, and performs real-time phase inversion calculations to track the driver's head position. A sound wave with the opposite phase but the same frequency and amplitude as the noise is emitted through the speaker, interfering with the noise to achieve phase cancellation and thus a sound shield effect. This invention achieves in-vehicle sound shield functionality without increasing hardware costs. It also eliminates unnecessary rear-seat passenger noise, protecting rear passenger privacy and improving driver concentration.

[0060] This invention acquires a first sound signal emitted by a first occupant inside the vehicle and the location information of a second occupant. Based on the first sound signal, the location information of the second occupant, and the location information of a first sound playback device inside the vehicle, a second sound signal is determined. The first sound playback device is then controlled to output the second sound signal, causing interference between the first and second sound signals when they reach the location of the second occupant, resulting in a sound loudness at the second occupant's location being less than a preset loudness threshold. A sound loudness at the second occupant's location being less than the preset loudness threshold indicates that, due to sound interference, the loudness of the first sound signal emitted by the first occupant has been reduced to a small value when it reaches the second occupant's location, and the second occupant cannot clearly hear the conversation. Therefore, the privacy of conversations inside the vehicle cabin is improved.

[0061] Based on the same inventive concept, and referring to Figure 6 As shown, this embodiment of the invention provides a vehicle cabin sound control device 10, including: a data acquisition unit 110, used to acquire a first sound signal emitted by a first occupant in the vehicle, and to acquire the position information of a second occupant in the vehicle; a signal determination unit 120, used to determine a second sound signal based on the first sound signal, the position information of the second occupant, and the position information of a first sound playback device in the vehicle; and a sound control unit 130, used to control the first sound playback device to output the second sound signal, so that the first sound signal and the second sound signal interfere when they propagate to the position of the second occupant, so that the sound loudness at the position of the second occupant is less than a preset loudness threshold.

[0062] It is understandable that a first sound acquisition device is installed in the first cabin position inside the vehicle, and the first cabin position is the position of the first occupant; the data acquisition unit 110 includes: a first acquisition subunit, used to acquire the first sound signal through the first sound acquisition device.

[0063] The first cockpit location is the space area located above at least one rear seat in the vehicle, and the second occupant's location information is the location information of the driver's head position.

[0064] It is understandable that the driver wears a wearable device on his head, and the wearable device is equipped with a gyroscope; the data acquisition unit 110 also includes: a second acquisition subunit, which can be specifically used to acquire motion data from the gyroscope; and based on the motion data from the gyroscope, determine the position information of the driver's head.

[0065] It is understandable that a camera is installed on the center console of the vehicle; the second acquisition subunit can also be specifically used to acquire the driver image captured by the camera; based on the driver image, the position information of the driver's head position is determined.

[0066] It is understood that the signal determination unit 120 is specifically used to: input the first sound signal, the position information of the second occupant, and the position information of the first sound playback device in the vehicle into the target signal generation model to obtain the second sound signal.

[0067] Understandably, the vehicle cabin sound control device 10 also includes: a model building unit, used to build a target signal generation model, including the following steps: controlling a second sound playback device to play sound, and controlling a first sound acquisition device to acquire the sound from the second sound playback device to obtain a third sound signal, wherein the second sound playback device and the first sound acquisition device are located in the first cabin position; inputting the third sound signal into a preset first-level path transfer function to obtain a fourth sound signal, wherein the fourth sound signal is the actual sound signal after the third sound signal has changed when it propagates to the second cabin position, wherein the second cabin position is the position of the second occupant; inputting the third sound signal, the second cabin position, and the position information of the first sound playback device into the initial signal generation model to obtain a fifth sound signal; determining the signal error between the fourth and fifth sound signals; and iteratively optimizing the initial signal generation model based on the signal error to obtain the target signal generation model.

[0068] The initial signal generation model includes a phase inversion function and a second-level path transfer function. The third sound signal, the second cockpit position, and the position information of the first sound playback device are input into the initial signal generation model to obtain a fifth sound signal. This includes: inputting the third sound signal into the phase inversion function to obtain a sixth sound signal; and inputting the sixth sound signal into the second-level path transfer function to obtain the fifth sound signal. The position-related parameters of the second-level path transfer function are determined based on the position information of the second cockpit and the first sound playback device.

[0069] It should be understood that further implementation details of the vehicle cabin sound control device 10 in the embodiments of the present invention are described in the foregoing vehicle cabin sound control method, and will not be repeated here for the sake of brevity.

[0070] Based on the same inventive concept, embodiments of the present invention also provide a vehicle, such as Figure 7 As shown, it includes a memory 704, a processor 702, and a computer program stored in the memory 704 and executable on the processor 702. The processor 702 executes the program to implement the steps described in any embodiment of the vehicle cockpit voice control method.

[0071] Among them, Figure 7In this document, a bus architecture (represented by bus 700) is used. Bus 700 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 702 and memory represented by memory 704. Bus 700 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 705 provides an interface between bus 700 and receiver 701 and transmitter 703. Receiver 701 and transmitter 703 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 702 is responsible for managing bus 700 and general processing, while memory 704 can be used to store data used by processor 702 during operation.

[0072] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.

[0073] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0074] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0075] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0076] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A method for controlling the sound of a vehicle cabin, characterized in that, include: Acquire the first sound signal emitted by the first occupant inside the vehicle, and acquire the location information of the second occupant inside the vehicle; A first sound acquisition device is installed in the first cabin position inside the vehicle, and the first cabin position is the position of the first occupant; The step of acquiring the first sound signal emitted by the first occupant inside the vehicle includes: acquiring the first sound signal through the first sound acquisition device; Determining a second sound signal based on the first sound signal, the location information of the second occupant, and the location information of the first sound playback device inside the vehicle includes: inputting the first sound signal, the location information of the second occupant, and the location information of the first sound playback device inside the vehicle into a target signal generation model to obtain the second sound signal; the target signal generation model is pre-established through the following steps: controlling the second sound playback device to play sound, and controlling the first sound acquisition device to acquire the sound from the second sound playback device to obtain a third sound signal, wherein the second sound playback device and the first sound acquisition device are located at the first cabin position; inputting the third sound signal into a preset first-level path transfer function to obtain a fourth sound signal, wherein the fourth sound signal is the actual sound signal after the third sound signal has changed when it propagates to the second cabin position, where the second cabin position is the location of the second occupant; inputting the third sound signal, the second cabin position, and the location information of the first sound playback device into an initial signal generation model to obtain a fifth sound signal; determining the signal error between the fourth sound signal and the fifth sound signal; and iteratively optimizing the initial signal generation model based on the signal error to obtain the target signal generation model; The first sound playback device is controlled to output the second sound signal so that the first sound signal and the second sound signal interfere when they propagate to the location of the second occupant, so that the sound loudness at the location of the second occupant is less than a preset loudness threshold.

2. The vehicle cockpit sound control method according to claim 1, characterized in that, The first cockpit location is the space area located above at least one rear seat in the vehicle, and the second occupant's location information is the location information of the driver's head position.

3. The vehicle cabin sound control method according to claim 2, characterized in that, The driver wears a wearable device on his head, and the wearable device is equipped with a gyroscope. The step of obtaining the location information of the second occupant inside the vehicle includes: Acquire the motion data of the gyroscope; Based on the motion data from the gyroscope, the position information of the driver's head is determined.

4. The vehicle cockpit sound control method according to claim 2, characterized in that, A camera is installed on the center console of the vehicle; The step of obtaining the location information of the second occupant inside the vehicle includes: Acquire the driver image captured by the camera; Based on the driver image, the position information of the driver's head is determined.

5. The vehicle cockpit sound control method according to claim 1, characterized in that, The initial signal generation model includes a phase inversion function and a second-level path transfer function; the step of inputting the third sound signal, the second cockpit position, and the position information of the first sound playback device into the initial signal generation model to obtain the fifth sound signal includes: The third sound signal is input into the phase inversion function to obtain the sixth sound signal; The sixth audio signal is input to the second-level path transfer function to obtain the fifth audio signal, wherein the position-related parameters of the second-level path transfer function are determined based on the position of the second cockpit and the position information of the first audio playback device.

6. A sound control device for a vehicle cabin, characterized in that, include: The data acquisition unit is used to acquire the first sound signal emitted by the first occupant inside the vehicle, and to acquire the position information of the second occupant inside the vehicle. A first sound acquisition device is installed in the first cabin position inside the vehicle, and the first cabin position is the position of the first occupant; The step of acquiring the first sound signal emitted by the first occupant inside the vehicle includes: acquiring the first sound signal through the first sound acquisition device; A signal determination unit is configured to determine a second sound signal based on the first sound signal, the position information of the second occupant, and the position information of the first sound playback device inside the vehicle. This includes: inputting the first sound signal, the position information of the second occupant, and the position information of the first sound playback device inside the vehicle into a target signal generation model to obtain the second sound signal; the target signal generation model is pre-established through the following steps: controlling the second sound playback device to play sound, and controlling a first sound acquisition device to acquire sound from the second sound playback device to obtain a third sound signal; the second sound playback device and the first sound acquisition device... The system is set at the first cockpit position; the third sound signal is input to a preset first-level path transfer function to obtain a fourth sound signal, which is the actual sound signal after the third sound signal propagates to the second cockpit position, where the second cockpit position is the location of the second occupant; the third sound signal, the second cockpit position, and the position information of the first sound playback device are input to an initial signal generation model to obtain a fifth sound signal; the signal error between the fourth and fifth sound signals is determined; based on the signal error, the initial signal generation model is iteratively optimized to obtain the target signal generation model; The sound control unit is used to control the first sound playback device to output the second sound signal so that the first sound signal and the second sound signal interfere when they propagate to the location of the second occupant, so that the sound loudness at the location of the second occupant is less than a preset loudness threshold.

7. A vehicle, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method of any one of claims 1-5.

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