Acoustic system, method, apparatus, computer-readable storage medium and vehicle

Abstract

The present application relates to an acoustic system, a method, an apparatus, a computer-readable storage medium, and a vehicle, the acoustic system comprising: a controller and a noise control device, the controller being configured to acquire a sound signal, filter out non-noise signals from the sound signal, and obtain a noise signal, and the noise control device being configured to, on the basis of the noise signal, generate and output a noise control signal, so as to perform noise reduction on the noise signal. According to the technical solution above, non-noise signals are filtered out from the sound signal to obtain the noise signal, and noise reduction is performed on the noise signal, thereby preventing noise reduction from being performed also on non-noise sounds such as navigating sounds or music in the cabin, and reducing crosstalk caused to non-noise sounds during noise reduction.

Description

Acoustic systems, methods, apparatus, computer-readable storage media, and vehicles

[0001] This application claims priority to Chinese application No. 202411758634.3, filed on November 29, 2024, entitled "Acoustic System, Method, Apparatus, Computer-Readable Storage Medium and Vehicle", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to, but is not limited to, the field of electronic technology, and particularly to an acoustic system, method, apparatus, computer-readable storage medium, and vehicle. Background Technology

[0003] With the rapid development of new energy vehicles, the sound quality of car cabins has received increasing attention. Road noise or hybrid engine noise intrudes into the cabin during the operation of new energy vehicles, seriously affecting the driving experience. In addition, driven by the new four modernizations of automobiles, automobiles have gradually transformed from simple means of transportation to intelligent terminal devices.

[0004] However, related noise control technologies tend to simultaneously reduce non-noise such as navigation sounds or music in the cockpit, which can cause crosstalk to non-noise during the noise reduction process, resulting in a reduced user experience. Technical solutions

[0005] This application provides an acoustic system to at least partially solve the above-mentioned technical problems.

[0006] To achieve the above objectives, according to a first aspect of this application, an acoustic system is provided, the acoustic system comprising: a controller and a noise control device, wherein:

[0007] The controller is used to acquire an audio signal, filter out non-noise signals from the audio signal, and obtain a noise signal;

[0008] The noise control device is used to generate and output a noise control signal based on the noise signal in order to reduce the noise signal.

[0009] Optionally, the acoustic system includes an error sensor, wherein:

[0010] The controller is used to filter out non-noise signals from the sound signal using the error sensor to obtain a noise signal.

[0011] Optionally, the acoustic system includes a microphone, wherein:

[0012] The controller is used to filter out non-noise signals from the sound signal through the microphone to obtain a reference sound signal;

[0013] The controller is used to locate the position of the human ear and determine the noise signal based on the position of the human ear and the reference sound signal;

[0014] Optionally, the noise control device includes a filter, wherein:

[0015] The noise control device is used to input the noise signal into the filter to generate the noise control signal.

[0016] Optionally, where:

[0017] The controller is configured to determine a reference noise signal based on the motion information corresponding to the vehicle, and update the filter coefficients in the filter based on the reference noise signal and the noise signal.

[0018] Optionally, where:

[0019] The controller is configured to determine an error signal based on the reference noise signal and the noise signal;

[0020] The controller is configured to update the filter coefficients in the filter based on the reference noise signal and the error signal.

[0021] Optionally, where:

[0022] The noise control device is used to control the loudspeaker to output the anti-phase sound wave corresponding to the noise control signal, so as to reduce the noise signal.

[0023] Optionally, the acoustic system further includes a sound field zoning device, wherein:

[0024] The controller is used to respond to partitioning instructions and acquire the partition audio signal corresponding to each partition position;

[0025] The sound field zoning device is used to play corresponding zone audio signals through speakers at each of the zoning locations.

[0026] Optionally, where:

[0027] The controller is used to input audio signals into a preset set of partition filters to obtain partition audio signals corresponding to each partition position.

[0028] Optionally, the set of partitioned filters includes partitioned filters corresponding to each partition location, wherein:

[0029] The controller is used to control the speakers corresponding to each partition position to play the corresponding excitation source audio based on a preset excitation source control signal, and to obtain the partition filter parameters corresponding to each partition position according to the excitation source control signal and the excitation source audio.

[0030] Optionally, the acoustic system further includes a directional sound source device, wherein:

[0031] The controller is used to perform compensation modulation processing on the navigation audio signal when it is identified as a navigation audio signal, so as to obtain a modulated signal.

[0032] The directional sound source device is used to generate and play the navigation audio signal to the target partition location based on the modulated signal.

[0033] Optionally, where:

[0034] The controller is used to perform distortion compensation on the navigation audio signal based on preset distortion information, and to perform frequency band modulation on the distortion-compensated navigation audio signal based on a preset frequency band to obtain a modulated signal.

[0035] Optionally, the directional sound source device includes an ultrasonic transducer, wherein:

[0036] The directional sound source device is used to control the ultrasonic transducer to output the modulated signal based on the target partition location, so as to play the navigation audio signal to the target partition location.

[0037] Optionally, the acoustic system further includes a privacy voice device, wherein:

[0038] The privacy voice device is used to acquire voice signals from a privacy area in response to a privacy voice command;

[0039] The controller is configured to generate a shielding signal based on the voice signal, and control the speaker in the non-privacy area to output the shielding signal, so as to shield the voice signal of the privacy area in the non-privacy area.

[0040] According to a second aspect of this application, embodiments of this application also provide a control method, the control method being applied to a controller in an acoustic system, the acoustic system further including a noise control device, the method comprising:

[0041] Acquire a sound signal, filter out non-noise signals from the sound signal to obtain a noise signal;

[0042] The noise signal is sent to the noise control device, so that the noise control device generates and outputs a noise control signal based on the noise signal to reduce the noise signal.

[0043] Optionally, the acoustic system includes an error sensor, and the step of filtering out non-noise signals from the sound signal to obtain a noise signal includes:

[0044] The noise signal is obtained by filtering out non-noise signals from the sound signal using the error sensor.

[0045] Optionally, the acoustic system includes a microphone, and the step of filtering non-noise signals from the sound signal to obtain a noise signal includes:

[0046] A reference sound signal is obtained by filtering out non-noise signals from the sound signal using the microphone.

[0047] The location of the human ear is determined, and the noise signal is determined based on the location of the human ear and the reference sound signal.

[0048] Optionally, the noise control device includes a filter, and the method further includes:

[0049] Obtain the vehicle's motion information;

[0050] Based on the motion information, a reference noise signal is determined;

[0051] Based on the reference noise signal and the noise signal, the filter coefficients in the filter are updated so that the noise control device inputs the reference noise signal into the filter to generate the noise control signal.

[0052] Optionally, updating the filter coefficients in the filter based on the reference noise signal and the noise signal includes:

[0053] Based on the reference noise signal and the noise signal, an error signal is determined;

[0054] The filter coefficients in the filter are updated based on the reference noise signal and the error signal.

[0055] Optionally, the acoustic system further includes a sound field zoning device, and the method further includes:

[0056] In response to the partitioning command, the audio signal is input into a preset set of partitioning filters to obtain the partitioned audio signal corresponding to each partition position;

[0057] The partitioned audio signal is sent to the sound field partitioning device so that the sound field partitioning device plays the corresponding partitioned audio signal through the speaker corresponding to each partition position.

[0058] Optionally, before responding to the partitioning command and inputting the audio signal into a preset set of partitioning filters to obtain the partitioned audio signal corresponding to each partition position, the following steps are included:

[0059] Based on the preset excitation source control signal, the speaker at each partition position plays the corresponding excitation source audio.

[0060] Based on the excitation source control signal and the excitation source audio, the partition filter parameters corresponding to each partition position are obtained, and a preset partition filter set is obtained.

[0061] Optionally, the acoustic system further includes a directional sound source device, and the method further includes:

[0062] When the partition audio signal is identified as a navigation audio signal, the navigation audio signal is subjected to compensation modulation processing to obtain the modulated signal;

[0063] The modulated signal is sent to the directional sound source device, so that the directional sound source device generates and plays the navigation audio signal to the target partition location based on the modulated signal.

[0064] Optionally, the step of performing compensatory modulation processing on the navigation audio signal to obtain the modulated signal includes:

[0065] Based on preset distortion information, the navigation audio signal is distorted and compensated, and the distorted navigation audio signal is frequency-modulated based on a preset frequency band to obtain a modulated signal.

[0066] Optionally, the acoustic system further includes a privacy voice device, and the method further includes:

[0067] Receive the voice signal of the privacy area acquired by the privacy voice device in response to the privacy voice command;

[0068] Generate a shielding signal based on the voice signal;

[0069] The speaker in the non-privacy area is controlled to output the shielding signal to shield the voice signal of the privacy area within the non-privacy area.

[0070] According to a third aspect of this application, embodiments of this application also provide an acoustic device, the acoustic device comprising: one or more processors and a memory; and one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor as steps of any of the control methods provided in embodiments of this application.

[0071] According to a fourth aspect of this application, embodiments of this application also provide a computer-readable storage medium storing a plurality of computer programs adapted for loading by a processor to perform the steps of any of the control methods provided in embodiments of this application.

[0072] According to a fifth aspect of this application, embodiments of this application also provide a computer program product, including a computer program or computer program that, when executed by a processor, implements the steps in any of the power distribution harness protection methods provided in embodiments of this application.

[0073] According to a sixth aspect of this application, embodiments of this application also provide a vehicle, the vehicle including the acoustic system and the acoustic device provided in embodiments of this application.

[0074] The acoustic system of this application embodiment includes: a controller and a noise control device, wherein: the controller is used to acquire a sound signal, filter out non-noise signals from the sound signal to obtain a noise signal; the noise control device is used to generate and output a noise control signal based on the noise signal to reduce noise in the noise signal. Through the above technical solution, non-noise signals are filtered out from the sound signal to obtain a noise signal, which is then used to reduce noise, avoiding simultaneous noise reduction of non-noise such as navigation sounds or music in the cockpit, reducing crosstalk to non-noise during the noise reduction process, and improving the user experience.

[0075] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0076] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0077] Figure 1 is a schematic diagram of an acoustic system provided in an embodiment of this application;

[0078] Figure 2 is a schematic diagram of the headrest structure of the vehicle provided in an embodiment of this application;

[0079] Figure 3 is a schematic diagram of an acoustic system provided in an embodiment of this application;

[0080] Figure 4 is a schematic diagram of an acoustic system provided in an embodiment of this application;

[0081] Figure 5 is a schematic diagram of a directional sound source provided in an embodiment of this application;

[0082] Figure 6 is a schematic diagram of an acoustic system provided in an embodiment of this application;

[0083] Figure 7 is a schematic diagram of an acoustic system provided in an embodiment of this application;

[0084] Figure 8 is a flowchart illustrating the first embodiment of the control method provided in this application.

[0085] Figure 9 is a flowchart illustrating a second embodiment of the control method provided in this application.

[0086] Figure 10 is a flowchart illustrating a third embodiment of the control method provided in this application.

[0087] Figure 11 is a flowchart illustrating the fourth embodiment of the control method provided in this application.

[0088] Figure 12 is a structural schematic diagram of the vehicle provided in an embodiment of this application.

[0089] Implementation methods of this application

[0090] The technical solutions of the embodiments of this application 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 this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0091] This application provides an acoustic system. Please refer to Figure 1, which is a schematic diagram of the structure of an acoustic system provided in an embodiment of this application.

[0092] The acoustic system includes: a controller and a noise control device, wherein:

[0093] A controller is used to acquire sound signals, filter out non-noise signals from the sound signals, and obtain noise signals;

[0094] A noise control device is used to generate and output a noise control signal based on a noise signal in order to reduce the noise signal.

[0095] In this embodiment, the communication connection between the controller and the noise control device can be established using CAN communication or similar methods. The controller can acquire the sound signal near the passenger's ear through devices such as microphones in the vehicle, and filter out non-noise signals from the sound signal to obtain the noise signal. The non-noise signals include navigation sounds or music emitted by other devices in the vehicle, as well as the sounds of conversations among passengers in the vehicle. The controller sends the noise signal to the noise control device, which generates a noise control signal based on the noise signal. The noise control device then controls the speakers in the vehicle to emit inverse sound waves based on the noise control signal to reduce the noise signal.

[0096] The acoustic system in this embodiment filters out non-noise signals from the sound signal to obtain the noise signal, and then performs noise reduction on the noise signal. This avoids simultaneously reducing non-noise such as navigation sounds or music in the cockpit, reducing crosstalk to non-noise during the noise reduction process, and improving the user experience.

[0097] In one embodiment, the acoustic system includes an error sensor, and the noise control device includes a filter, wherein:

[0098] The controller is used to filter out non-noise signals from the sound signal using an error sensor to obtain the noise signal;

[0099] The controller is used to determine the reference noise signal based on the motion information of the vehicle, and update the filter coefficients in the filter based on the reference noise signal and the noise signal.

[0100] A noise control device is used to input a reference noise signal into a filter and generate a noise control signal.

[0101] Specifically, when the controller acquires an audio signal, it uses an error sensor to filter out non-noise signals from the audio signal to obtain a noise signal. The controller also acquires the vehicle's motion information and, based on this information, determines a reference noise signal. This motion information includes engine speed and wheel acceleration. The reference noise signal determined by the controller based on engine speed is the engine noise signal, and the reference noise signal determined based on wheel acceleration is the road noise signal. The controller updates the filter coefficients in the filter based on the reference noise signal and the noise signal. Finally, the controller sends the engine noise signal and the road noise signal to the noise control device, which inputs the reference noise signal into the filter to generate a noise control signal.

[0102] Furthermore, the controller is used to determine the error signal based on the reference noise signal and the noise signal; the controller is used to update the filter coefficients in the filter based on the reference noise signal and the error signal.

[0103] Specifically, the controller determines the error signal corresponding to the engine noise signal based on the engine noise signal and the noise signal, and determines the error signal corresponding to the road noise signal based on the road noise signal and the noise signal; the controller updates the filter coefficients in the filter that processes the engine noise signal based on the engine noise signal and the error signal corresponding to the engine noise signal, and updates the filter coefficients in the filter that processes the road noise signal based on the road noise signal and the error signal corresponding to the road noise signal.

[0104] Understandably, the noise control device consists of two parts: Engine Active Noise Cancellation (ENC) and Road Noise Active Noise Cancellation (RNC). In ENC, the controller extracts the engine speed via the CAN bus to obtain the current engine's order noise as a reference noise signal (engine noise signal). In RNC, the reference noise signal (road noise signal) is obtained through an accelerometer. Based on the engine noise signal and the road noise signal, the controller determines the error signal corresponding to the engine noise signal; based on the road noise signal and the road noise signal, it determines the error signal corresponding to the road noise signal. The controller updates the filter coefficients in the filter processing the engine noise signal based on the engine noise signal and its corresponding error signal; similarly, it updates the filter coefficients in the filter processing the road noise signal based on the road noise signal and its corresponding error signal. The noise control device passes the engine noise signal through the updated coefficient filter to obtain the noise control signal corresponding to the engine noise signal. The noise control device also passes the road noise signal through the updated coefficient filter to obtain the noise control signal corresponding to the road noise signal. Finally, the noise control device, based on the noise control signals corresponding to the engine noise signal and the road noise signal, broadcasts anti-phase sound waves through secondary speakers (surround speakers and headrest speakers) to achieve the noise control effect.

[0105] Furthermore, when the reference noise signal includes only engine noise or road noise, the noise control device, based on the noise control signal corresponding to either the engine noise signal or the road noise signal, broadcasts inverse sound waves through secondary speakers (surround speakers and headrest speakers) to achieve noise control. When the reference noise signal includes both engine noise and road noise, the noise control device superimposes the noise control signals corresponding to the engine noise and road noise to obtain a superimposed noise control signal, which is then broadcast inverse sound waves through secondary speakers (surround speakers and headrest speakers) to achieve noise control for both engine noise and road noise.

[0106] The acoustic system in this embodiment acquires a reference noise signal, updates the filter coefficients in the filter based on the reference noise signal and the noise signal, and then inputs the reference noise signal into the filter to generate a noise control signal. Based on the noise control signal, an inverted sound wave is emitted from a secondary speaker to achieve the noise control effect. This avoids simultaneously reducing non-noise such as navigation sounds or music in the cockpit, reducing crosstalk to non-noise during the noise reduction process, and improving the user experience.

[0107] In one embodiment, the acoustic system includes a microphone, and the noise control device includes a filter, wherein:

[0108] The controller is used to filter out non-noise signals from the sound signal through the microphone to obtain a reference sound signal;

[0109] The controller is used to locate the position of the human ear and determine the noise signal based on the position of the human ear and a reference sound signal;

[0110] Specifically, the controller calculates the acoustic transfer function between the microphone and the virtual microphone by locating the human ear position in real time. The controller filters out non-noise signals from the sound signal collected by the microphone to obtain a reference sound signal, performs acoustic transfer function compensation on the reference sound signal, and obtains the virtual microphone signal, which is then used as the noise signal.

[0111] The controller is configured to determine a reference noise signal based on the motion information corresponding to the vehicle, and update the filter coefficients in the filter based on the reference noise signal and the noise signal.

[0112] The noise control device is used to input the noise signal into the filter to generate the noise control signal.

[0113] Specifically, the controller acquires the vehicle's motion information and determines a reference noise signal based on this information. The motion information includes engine speed and wheel acceleration. The reference noise signal determined by the controller based on engine speed is the engine noise signal, and the reference noise signal determined based on wheel acceleration is the road noise signal. The controller updates the filter coefficients in the filter based on the reference noise signal and the road noise signal. The controller sends the engine noise signal and the road noise signal to the noise control device, which inputs the noise signal into the filter to generate a noise control signal. Based on the noise control signals corresponding to the engine noise signal and the road noise signal, the noise control device broadcasts inverse sound waves through secondary speakers (surround speakers and headrest speakers) to achieve noise control.

[0114] For example, referring to Figure 2, which is a schematic diagram of a vehicle headrest structure; the microphone is a headrest microphone. The position of the headrest microphone may vary depending on the needs of the acoustic system's error sensor or virtual microphone technology. When virtual microphone technology is not used, the error microphone must be installed near the ear. When using virtual microphone technology, the headrest microphone is installed in a position where the signal is strongly correlated with the ear and is less susceptible to speaker interference. The headrest speakers, as speakers for active noise control and automotive sound field zoning, can improve noise control effectiveness and sound field contrast while ensuring sound quality.

[0115] The acoustic system in this embodiment filters out non-noise signals from a sound signal using a microphone to obtain a reference sound signal; it locates the position of the human ear and determines a noise signal based on the ear position and the reference sound signal; it determines a reference noise signal based on the vehicle's motion information, and updates the filter coefficients in the filter based on the reference noise signal and the noise signal. This improves the accuracy of the determined noise signal, thereby improving the accuracy of updating the filter coefficients in the filter. The reference noise signal is then input into the filter to generate a noise control signal, which improves the accuracy of the generated noise control signal and helps to improve the noise control effect.

[0116] Please refer to Figure 3, which is a schematic diagram of an acoustic system provided in an embodiment of this application.

[0117] The acoustic system includes: a controller and a sound field zoning device, wherein:

[0118] The controller is used to respond to partition commands and acquire the partition audio signal corresponding to each partition location;

[0119] A sound field zoning device is used to play the corresponding zone audio signal through the speakers at each zone location.

[0120] Specifically, the controller is used to input the audio signal into a preset set of partition filters to obtain the partition audio signal corresponding to each partition position.

[0121] Understandably, the controller responds to the zoning command and obtains the zoning audio signal corresponding to each zoning position. The zoning position can include: driver's seat, front passenger seat, rear passenger seat, etc. The controller inputs the audio signal on the audio bus into each zoning filter of the preset zoning filter set to obtain the zoning audio signal corresponding to each zoning position. The sound field zoning device plays the corresponding zoning audio signal through the speaker corresponding to each zoning position.

[0122] For example, the controller determines the partition location as the passenger seat and inputs the audio signal on the audio bus into each partition filter of a preset partition filter set. The partition filter set includes the partition filter corresponding to the passenger seat. The partition filter corresponding to the passenger seat filters out the partition audio signal corresponding to the passenger seat from the audio signal. The sound field partitioning device plays the partition audio signal corresponding to the passenger seat through the speaker corresponding to the passenger seat. The partition filters corresponding to other partition locations in the partition filter set filter out the partition audio signal corresponding to the passenger seat from the audio signal. Therefore, the speakers corresponding to other partition locations will not play the partition audio signal corresponding to the passenger seat.

[0123] Furthermore, the controller is used to control the speakers corresponding to each partition position to play the corresponding excitation source audio based on the preset excitation source control signal, and to obtain the partition filter parameters corresponding to each partition position according to the excitation source control signal and the excitation source audio.

[0124] Specifically, before achieving the audio zoning effect, a sufficient number of microphones are placed at each zoning location. For each zoning location, the controller controls the speaker at that location to play an excitation source control signal (white noise), uses the microphone to pick up the played excitation source audio, calculates the electroacoustic transfer function based on the excitation source control signal and the excitation source audio, substitutes the measured electroacoustic transfer function into the audio zoning algorithm, and calculates the zoning filter parameters corresponding to that zoning location.

[0125] In this embodiment of the acoustic system, the controller responds to a zoning command and acquires the zoning audio signal corresponding to each zoning location; the sound field zoning device is used to play the corresponding zoning audio signal through the speakers at each zoning location, thus achieving the effect of audio zoning.

[0126] Please refer to Figure 4, which is a schematic diagram of an acoustic system provided in an embodiment of this application.

[0127] An acoustic system includes: a controller, a sound field zoning device, and a directional sound source device.

[0128] The controller is used to perform compensation modulation processing on the navigation audio signal when it is identified as a zone audio signal, so as to obtain a modulated signal.

[0129] A directional sound source device for generating and playing navigation audio signals to a target zone location based on a modulated signal.

[0130] Specifically, in response to a partition command, the controller acquires the partition audio signal corresponding to each partition location. If it determines that the partition audio signal corresponding to a certain partition location is a navigation audio signal, it performs compensation modulation processing on the navigation audio signal to obtain a modulated signal. The directional sound source device generates and plays the navigation audio signal to the target partition location based on the modulated signal.

[0131] Specifically, the controller is used to perform distortion compensation on the navigation audio signal based on preset distortion information, and to perform frequency band modulation on the distortion-compensated navigation audio signal based on a preset frequency band to obtain a modulated signal.

[0132] Before the directional sound source actually operates, the controller calculates the distortion of the highly directional signal through simulation and experimentation, obtaining preset distortion information. The controller then uses a distortion compensation algorithm and the preset distortion information to compensate for the distortion of the navigation audio signal. Based on a preset frequency band, it performs frequency band modulation on the distorted navigation audio signal to obtain a modulated signal, which improves the fidelity and clarity of the navigation audio signal output by the directional sound source device.

[0133] For example, when the controller determines that the zone location is the driver's seat and that the zone audio signal corresponding to the driver's seat is the navigation audio signal, it performs distortion compensation on the navigation audio signal based on preset distortion information, and then modulates the distortion-compensated navigation audio signal based on a preset frequency band to obtain a modulated signal. The directional sound source device in the driver's seat generates and plays the navigation audio signal to the driver's seat based on the modulated signal. Therefore, the directional sound source devices corresponding to other zone locations will not play the navigation audio signal corresponding to the driver's seat.

[0134] Furthermore, a directional sound source device is used to control the ultrasonic transducer to output the modulated signal based on the target partition location, so as to play the navigation audio signal to the target partition location.

[0135] The directional sound source device includes an ultrasonic transducer. Based on the target zone location, the directional sound source device controls the ultrasonic transducer to output a modulated signal to play navigation audio signals to the target zone location. Please refer to Figure 5, which is a schematic diagram of a directional sound source structure provided in an embodiment of this application; a disc-shaped directional sound source includes a base, an ultrasonic transducer unit, and a housing. Preferably, thanks to the penetrating power of ultrasound, the directional sound source can be installed in the vehicle interior, display screen, or steering wheel without using an additional housing. Specifically, the directional sound source in the driver's seat is installed in a location that does not obstruct the driver's view, such as the steering wheel or dashboard. The ultrasonic transducer is connected to a circuit board in the base and receives signals from an integrated controller. Directional sound sources are installed in front of four seats in the passenger compartment. Each directional sound source includes an array of ultrasonic transducers, which can precisely control the direction of sound propagation and directionally transmit signals distributed by the integrated controller to each seat.

[0136] In this embodiment of the acoustic system, when the controller recognizes that the zone audio signal is a navigation audio signal, it compensates for the distortion of the navigation audio signal based on preset distortion information, and modulates the distortion-compensated navigation audio signal based on a preset frequency band to obtain a modulated signal. The directional sound source device generates and plays the navigation audio signal to the target zone location based on the modulated signal. This can enhance the clarity and directionality of the navigation audio signal, improve driving safety, and simultaneously improve the fidelity and clarity of the navigation audio signal output by the directional sound source device.

[0137] Please refer to Figure 6, which is a schematic diagram of an acoustic system provided in an embodiment of this application.

[0138] The acoustic system includes: a controller and a privacy voice device, wherein:

[0139] A privacy voice device for acquiring voice signals from a privacy area in response to a privacy voice command;

[0140] The controller is used to generate a shielding signal based on the voice signal and control the speaker in the non-privacy area to output the shielding signal to block the voice signal in the privacy area within the non-privacy area.

[0141] Specifically, the privacy voice device responds to a privacy voice command and acquires the voice signal of the privacy area; the controller generates a shielding signal based on the voice signal and controls the speakers in the non-privacy area to output the shielding signal, thereby shielding the voice signal of the privacy area within the non-privacy area. For example, a privacy function switch is installed on the armrest of the rear passenger seat, directly connected to the controller, supporting one-button activation of area shielding; the privacy voice device responds to a privacy voice command from the rear passenger seat and acquires the voice signal from the rear passenger seat; the controller generates a shielding signal based on the voice signal and controls the speakers in the driver's and front passenger's seats to output the shielding signal, thereby shielding the voice signal of the rear passenger seat within the driver's and front passenger's seats.

[0142] Furthermore, after determining the voice signal in the privacy area, the controller acquires the sound signal near the passenger's ear through devices such as microphones in the non-privacy area of ​​the vehicle, and filters out non-noise signals from the sound signal to obtain a noise signal, which includes the voice signal in the privacy area. Based on the noise signal, the noise control device generates and outputs a noise control signal, and controls the speaker in the non-privacy area to play an anti-phase sound wave to reduce the noise of the voice signal in the privacy area, thereby shielding the voice signal in the privacy area from the non-privacy area.

[0143] In this embodiment, the acoustic system includes a privacy voice device that responds to privacy voice commands and acquires voice signals from a privacy area. The controller generates a shielding signal based on the voice signal and controls the speaker in the non-privacy area to output the shielding signal, thus blocking the voice signals from the privacy area within the non-privacy area. This enables privacy in voice communication within specific areas of the cabin, enhancing user safety and satisfaction.

[0144] In specific implementation, please refer to Figure 7, which is a structural schematic diagram of an acoustic system provided in an embodiment of this application.

[0145] The acoustic system includes: a controller, a noise control device, a sound field zoning device, a directional sound source device, a privacy voice device, and a speaker microphone array.

[0146] The integrated controller, as the core of the system, is responsible for coordinating the operation of various devices and achieving integrated management of complex acoustic functions. The system includes active noise control devices, automotive sound field zoning devices, directional sound source devices, speaker-microphone arrays, and area shielding systems, enabling functions such as cabin noise cancellation, independent private audio, independent navigation tones, and private voice communication.

[0147] The noise control device is divided into active engine noise control and active road noise control. It obtains engine reference signals and road noise reference signals through engine speed and acceleration sensors, respectively, and obtains error signals through in-cabin error sensors or virtual microphone technology. The adaptive filter coefficients are iteratively updated in the integrated controller, and anti-phase sound waves are generated to control noise.

[0148] The sound field zoning device pre-sets a certain number of control points within the carriage, then measures the electroacoustic transfer function from each speaker to each control point. A control filter for each speaker is trained using a sound field zoning algorithm and stored in the integrated controller's memory unit. Based on the user-selected zoning location and zoning sound source, the sound source is filtered in the integrated controller to obtain the output signal for each speaker.

[0149] A directional sound source device modulates the input signal into an ultrasonic signal within an integrated controller, and outputs the ultrasonic signal using a highly directional ultrasonic transducer array, enabling directional sound transmission within a specific area, such as independent navigation tones. A distortion compensation algorithm is incorporated to reduce output signal distortion and improve sound quality.

[0150] The speaker-microphone array includes headrest speakers in each seat, surround speakers throughout the cabin, headrest microphones, and microphones in other locations. The headrest and surround speakers can work collaboratively as needed by active noise control or sound field zoning systems, while the microphones can autonomously filter signals emitted by the speakers during sound pickup, improving sound quality and preventing crosstalk between different systems. The speaker placement is also optimized for sound field zoning technology, enhancing the zoning effect.

[0151] The privacy voice device provides users with a private voice communication environment through sound wave interference and sound masking effects. A privacy function switch is installed in the rear of the vehicle to achieve one-button isolation of the rear seats.

[0152] The controller, installed within the vehicle's center console, includes a digital signal processor (DSP), a microcontroller unit (MCU), an A2B (Audio-to-Broadcast) interface, an A2B CAN bus interface, a storage unit, and a power amplifier. Its highly integrated design simplifies wiring in the vehicle's center console, reduces space requirements, and improves system reliability and stability. When two or more devices are activated, the microphone signal received by one device is filtered out by the controller to remove the signal output from another device, reducing crosstalk between devices. Simultaneously, the collaborative work of the DSP and MCU enables high-quality audio processing and control, enhancing the user's driving experience. An accelerometer is installed at suitable locations near each of the vehicle's four wheels. Each accelerometer can collect triaxial acceleration signals; these sensors need to be waterproof, dustproof, and able to operate stably while the vehicle is in motion. High-speed, low-latency data transmission between the sensors and the integrated controller is achieved through A2B bus technology.

[0153] After the vehicle starts, the system initializes and enters a standby state.

[0154] When the engine starts, the system initiates active engine noise control. The controller reads the engine speed from the CAN bus and activates the error microphone (optional: virtual microphone), surround speakers, and headrest speakers. The system emits anti-phase sound waves based on the current engine speed to cancel out engine noise.

[0155] When the vehicle is in motion, the system activates active road noise control. This activates the accelerometer, error microphone (optional: virtual microphone), surround speakers, and headrest speakers. The system then sends out anti-phase noise cancellation signals based on the current chassis vibration.

[0156] When a user selects to play audio: The system checks if the user has selected the zone function. If not, it plays full-vehicle surround sound. If the user has selected the zone function, it determines whether the user wants to play music or navigation. If navigation is selected, the independent navigation sound system is activated. The corresponding directional sound source is turned on, playing navigation sounds to the designated location. If the user has selected a music zone, the car's sound field zoning system is activated. The user specifies the zone location and the sound source to be played. The surround speakers, headrest speakers, and directional sound source (optional) are turned on. Independent, private audio is played in each zone, without interference between zones.

[0157] When a user selects private voice communication, the area blocking system is activated. This turns on the surround speakers, headrest speakers, and microphones. It blocks sound waves in specific areas, providing a private voice communication environment.

[0158] Referring to Figure 8, which is a schematic flowchart of a first embodiment of the control method provided in this application, the control method is applied to a controller in the acoustic system of a vehicle. The acoustic system further includes a noise control device, and the method includes:

[0159] Step 101: Acquire an audio signal, filter out non-noise signals from the audio signal to obtain a noise signal;

[0160] Step 102: The noise signal is sent to the noise control device so that the noise control device generates and outputs a noise control signal based on the noise signal to reduce the noise signal.

[0161] In this embodiment, the communication connection between the controller and the noise control device can be established using CAN communication or similar methods. The controller can acquire the sound signal near the passenger's ear through devices such as microphones in the vehicle, and filter out non-noise signals from the sound signal to obtain the noise signal. The non-noise signals include navigation sounds or music emitted by other devices in the vehicle, as well as the sounds of conversations among passengers in the vehicle. The controller sends the noise signal to the noise control device, which generates a noise control signal based on the noise signal. The noise control device then controls the speakers in the vehicle to emit inverse sound waves based on the noise control signal to reduce the noise signal.

[0162] The controller in this embodiment filters out non-noise signals from the sound signal to obtain the noise signal, and then performs noise reduction on the noise signal. This avoids simultaneously reducing non-noise such as navigation sounds or music in the cockpit, thereby reducing crosstalk to non-noise during the noise reduction process and improving the user experience.

[0163] Specifically, the vehicle includes an error sensor, and the step of filtering non-noise signals from the sound signal to obtain a noise signal includes:

[0164] Step 1011: The noise signal is obtained by filtering out the non-noise signal from the sound signal using the error sensor.

[0165] Specifically, the vehicle includes a microphone, and the step of filtering non-noise signals from the sound signal to obtain a noise signal includes:

[0166] Step 1012: Filter out non-noise signals from the sound signal using the microphone to obtain a reference sound signal;

[0167] Step 1013: Locate the position of the human ear, and determine the noise signal based on the position of the human ear and the reference sound signal.

[0168] In this embodiment, optionally, the vehicle includes an error sensor. When the controller acquires an audio signal, it uses the error sensor to filter out non-noise signals from the audio signal to obtain a noise signal, which can improve the efficiency of determining the noise signal. Optionally, the vehicle includes a microphone. The controller calculates the acoustic transfer function between the microphone and the virtual microphone by real-time positioning of the user's ear. The controller filters out non-noise signals from the audio signal acquired by the microphone to obtain a reference audio signal. Acoustic transfer function compensation is then performed on the reference audio signal to obtain a virtual microphone signal, which serves as the noise signal, thus improving the accuracy of determining the noise signal.

[0169] Specifically, the noise control device includes a filter, and step 102 includes:

[0170] Step 1021: Obtain the motion information corresponding to the vehicle;

[0171] Step 1022: Based on the motion information, determine the reference noise signal;

[0172] Step 1023: Based on the reference noise signal and the noise signal, update the filter coefficients in the filter so that the noise control device inputs the reference noise signal into the filter to generate the noise control signal.

[0173] Specifically, step 1023 includes:

[0174] Step 10231: Determine the error signal based on the reference noise signal and the noise signal;

[0175] Step 10232: Update the filter coefficients in the filter based on the reference noise signal and the error signal.

[0176] In this embodiment, the controller acquires the vehicle's motion information and determines a reference noise signal based on this information. The motion information includes engine speed and wheel acceleration. The reference noise signal determined by the controller based on engine speed is the engine noise signal, and the reference noise signal determined based on wheel acceleration is the road noise signal. The controller updates the filter coefficients in the filter based on the reference noise signal and the road noise signal. The controller sends the engine noise signal and the road noise signal to the noise control device, which inputs the noise signal into the filter to generate a noise control signal. Based on the noise control signals corresponding to the engine noise signal and the road noise signal, the noise control device broadcasts inverse sound waves through secondary speakers (surround speakers and headrest speakers) to achieve noise control.

[0177] Understandably, the noise control device consists of two parts: Engine Active Noise Cancellation (ENC) and Road Noise Active Noise Cancellation (RNC). In ENC, the controller extracts the engine speed via the CAN bus to obtain the current engine's order noise as a reference noise signal (engine noise signal). In RNC, the controller acquires the reference noise signal (road noise signal) through an accelerometer. Based on the engine noise signal and the road noise signal, the controller determines the error signal corresponding to the engine noise signal; based on the road noise signal and the road noise signal, it determines the error signal corresponding to the road noise signal. The controller updates the filter coefficients in the filter processing the engine noise signal based on the engine noise signal and its corresponding error signal; it also updates the filter coefficients in the filter processing the road noise signal based on the road noise signal and its corresponding error signal. The noise control device passes the engine noise signal through the updated coefficient filter to obtain the noise control signal corresponding to the engine noise signal. Similarly, the noise control device passes the road noise signal through the updated coefficient filter to obtain the noise control signal corresponding to the road noise signal. Finally, the noise control device, based on the noise control signals corresponding to the engine noise signal and the road noise signal, broadcasts anti-phase sound waves through secondary speakers (surround speakers and headrest speakers) to achieve the noise control effect.

[0178] Furthermore, when the reference noise signal includes only engine noise or road noise, the noise control device, based on the noise control signal corresponding to either the engine noise signal or the road noise signal, broadcasts inverse sound waves through secondary speakers (surround speakers and headrest speakers) to achieve noise control. When the reference noise signal includes both engine noise and road noise, the noise control device superimposes the noise control signals corresponding to the engine noise and road noise to obtain a superimposed noise control signal, which is then broadcast inverse sound waves through secondary speakers (surround speakers and headrest speakers) to achieve noise control for both engine noise and road noise.

[0179] The controller in this embodiment acquires a reference noise signal, updates the filter coefficients in the filter based on the reference noise signal and the noise signal, and then inputs the reference noise signal into the filter to generate a noise control signal. Based on the noise control signal, an inverted sound wave is emitted from the secondary speaker to achieve the noise control effect. This avoids simultaneously reducing non-noise such as navigation sounds or music in the cockpit, reducing crosstalk to non-noise during the noise reduction process, and improving the user experience.

[0180] Please refer to Figure 9, which is a flowchart illustrating a second embodiment of the control method provided in this application. The acoustic system further includes a sound field zoning device, and the method further includes:

[0181] Step 201: In response to the partitioning command, the audio signal is input into a preset partitioning filter set to obtain the partitioned audio signal corresponding to each partition position;

[0182] Step 202: Send the partitioned audio signal to the sound field partitioning device so that the sound field partitioning device plays the corresponding partitioned audio signal through the speakers corresponding to each partition position.

[0183] In this embodiment, the controller responds to the partitioning command and obtains the partitioned audio signal corresponding to each partitioned position. The partitioned position may include: driver's seat, front passenger seat, rear passenger seat, etc. The controller inputs the audio signal on the audio bus into each partitioned filter of the preset partitioned filter set to obtain the partitioned audio signal corresponding to each partitioned position. The sound field partitioning device plays the corresponding partitioned audio signal through the speaker corresponding to each partitioned position.

[0184] For example, the controller determines the partition location as the passenger seat and inputs the audio signal on the audio bus into each partition filter of a preset partition filter set. The partition filter set includes the partition filter corresponding to the passenger seat. The partition filter corresponding to the passenger seat filters out the partition audio signal corresponding to the passenger seat from the audio signal. The sound field partitioning device plays the partition audio signal corresponding to the passenger seat through the speaker corresponding to the passenger seat. The partition filters corresponding to other partition locations in the partition filter set filter out the partition audio signal corresponding to the passenger seat from the audio signal. Therefore, the speakers corresponding to other partition locations will not play the partition audio signal corresponding to the passenger seat.

[0185] In this embodiment, the controller, in response to a zoning command, acquires the zoning audio signal corresponding to each zoning location; the sound field zoning device is used to play the corresponding zoning audio signal through the speaker corresponding to each zoning location, thus achieving the effect of audio zoning.

[0186] Specifically, before responding to the partitioning command and inputting the audio signal into a preset set of partitioning filters to obtain the partitioned audio signal corresponding to each partition position, the following steps are included:

[0187] Step a: Control the speakers corresponding to each partition position to play the excitation source audio based on the preset excitation source control signal;

[0188] Step b: Based on the excitation source control signal and the excitation source audio, obtain the partition filter parameters corresponding to each partition position, and obtain a preset partition filter set.

[0189] In this embodiment, before achieving the audio zoning effect, a sufficient number of microphones are arranged at each zoning location. For each zoning location, the controller controls the speaker at that location to play an excitation source control signal (white noise), uses the microphones to pick up the played excitation source audio, calculates the electroacoustic transfer function based on the excitation source control signal and the excitation source audio, substitutes the measured electroacoustic transfer function into the audio zoning algorithm, calculates the zoning filter parameters corresponding to that zoning location, and obtains the preset zoning filter corresponding to each zoning location based on the zoning filter parameters corresponding to each zoning location, thereby obtaining a preset zoning filter set.

[0190] In this embodiment, the controller pre-trains the partition filters corresponding to each partition position before implementing the audio partitioning effect, which can improve the accuracy of the subsequent audio partitioning effect.

[0191] Please refer to Figure 10, which is a schematic flowchart of the third embodiment of the control method provided in this application. The acoustic system further includes a directional sound source device, and the method further includes:

[0192] Step 301: When the partition audio signal is identified as a navigation audio signal, the navigation audio signal is subjected to compensation modulation processing to obtain the modulated signal;

[0193] Step 302: The modulated signal is sent to the directional sound source device so that the directional sound source device generates and plays the navigation audio signal to the target partition location based on the modulated signal.

[0194] In this embodiment, the controller responds to the partition command, obtains the partition audio signal corresponding to each partition position, and if it is determined that the partition audio signal corresponding to a certain partition position is the navigation audio signal, the navigation audio signal is subjected to compensation modulation processing to obtain the modulated signal, and the modulated signal is sent to the directional sound source device. The directional sound source device generates and plays the navigation audio signal to the target partition position based on the modulated signal.

[0195] The directional sound source device includes an ultrasonic transducer. Based on the target zone location, the directional sound source device controls the ultrasonic transducer to output a modulated signal to play navigation audio signals to the target zone location. Please refer to Figure 5, which is a schematic diagram of a directional sound source structure provided in an embodiment of this application; a disc-shaped directional sound source includes a base, an ultrasonic transducer unit, and a housing. Preferably, thanks to the penetrating power of ultrasound, the directional sound source can be installed in the vehicle interior, display screen, or steering wheel without using an additional housing. Specifically, the directional sound source in the driver's seat is installed in a location that does not obstruct the driver's view, such as the steering wheel or dashboard. The ultrasonic transducer is connected to a circuit board in the base and receives signals from an integrated controller. Directional sound sources are installed in front of four seats in the passenger compartment. Each directional sound source includes an array of ultrasonic transducers, which can precisely control the direction of sound propagation and directionally transmit signals distributed by the integrated controller to each seat.

[0196] Specifically, the compensation modulation processing of the navigation audio signal to obtain the modulated signal includes:

[0197] Step 3011: Based on preset distortion information, perform distortion compensation on the navigation audio signal, and perform frequency band modulation on the distortion-compensated navigation audio signal based on a preset frequency band to obtain a modulated signal.

[0198] Before the directional sound source actually operates, the controller calculates the distortion of the highly directional signal through simulation and experimentation, obtaining preset distortion information. The controller then uses a distortion compensation algorithm and the preset distortion information to compensate for the distortion of the navigation audio signal. Based on a preset frequency band, it performs frequency band modulation on the distorted navigation audio signal to obtain a modulated signal, which improves the fidelity and clarity of the navigation audio signal output by the directional sound source device.

[0199] For example, when the controller determines that the zone location is the driver's seat and that the zone audio signal corresponding to the driver's seat is the navigation audio signal, it performs distortion compensation on the navigation audio signal based on preset distortion information, and then modulates the distortion-compensated navigation audio signal based on a preset frequency band to obtain a modulated signal. The directional sound source device in the driver's seat generates and plays the navigation audio signal to the driver's seat based on the modulated signal. Therefore, the directional sound source devices corresponding to other zone locations will not play the navigation audio signal corresponding to the driver's seat.

[0200] In this embodiment, when the controller recognizes that the zone audio signal is a navigation audio signal, it performs distortion compensation on the navigation audio signal based on preset distortion information, and performs frequency band modulation on the distortion-compensated navigation audio signal based on a preset frequency band to obtain a modulated signal. The directional sound source device generates and plays the navigation audio signal to the target zone location based on the modulated signal. This can enhance the clarity and directionality of the navigation audio signal, improve driving safety, and at the same time improve the fidelity and clarity of the navigation audio signal output by the directional sound source device.

[0201] Please refer to Figure 11, which is a schematic flowchart of the fourth embodiment of the control method provided in this application. The acoustic system further includes a privacy voice device, and the method further includes:

[0202] Step 401: Receive the voice signal of the privacy area acquired by the privacy voice device in response to the privacy voice command;

[0203] Step 402: Generate a shielding signal based on the voice signal;

[0204] Step 403: Control the speaker in the non-privacy area to output the shielding signal to shield the voice signal of the privacy area in the non-privacy area.

[0205] In this embodiment, the privacy voice device, in response to a privacy voice command, acquires the voice signal of the privacy area and sends the voice signal of the privacy area to the controller. The controller receives the voice signal of the privacy area acquired by the privacy voice device in response to the privacy voice command, generates a shielding signal based on the voice signal, and controls the speakers in the non-privacy area to output the shielding signal, thereby shielding the voice signal of the privacy area within the non-privacy area. For example, a privacy function switch is installed on the armrest of the rear passenger seat, directly connected to the controller, supporting one-button activation of the area shielding. The privacy voice device, in response to a privacy voice command from the rear passenger seat, acquires the voice signal from the rear passenger seat. The controller, based on the voice signal, generates a shielding signal and controls the speakers in the driver's and passenger's seats to output the shielding signal, thereby shielding the voice signal of the rear passenger seat within the driver's and passenger's seats.

[0206] Furthermore, after determining the voice signal in the privacy area, the controller acquires the sound signal near the passenger's ear through devices such as microphones in the non-privacy area of ​​the vehicle, and filters out non-noise signals from the sound signal to obtain a noise signal, which includes the voice signal in the privacy area. Based on the noise signal, the noise control device generates and outputs a noise control signal, and controls the speaker in the non-privacy area to play an anti-phase sound wave to reduce the noise of the voice signal in the privacy area, thereby shielding the voice signal in the privacy area from the non-privacy area.

[0207] In this embodiment, the controller receives voice signals from the privacy area obtained by the privacy voice device in response to a privacy voice command. Based on the voice signals, it generates a shielding signal and controls the speaker in the non-privacy area to output the shielding signal, thereby shielding the voice signals from the privacy area within the non-privacy area. This enables privacy in voice communication within specific areas of the cabin, enhancing user safety and satisfaction.

[0208] Accordingly, this application also provides a vehicle, as shown in FIG12, which is a structural schematic diagram of the vehicle provided in this application embodiment. The vehicle 1100 includes a processor 1101 with one or more processing cores, a memory 1102 with one or more computer-readable storage media, and a computer program stored on the memory 1102 and executable on the processor. The processor 1101 and the memory 1102 are electrically connected. Those skilled in the art will understand that the vehicle structure shown in the figures does not constitute a limitation on the vehicle, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0209] The processor 1101 is the control center of the vehicle 1100. It connects to various parts of the vehicle 1100 via various interfaces and lines. By running or loading software programs and / or units stored in the memory 1102, and by calling data stored in the memory 1102, it executes various functions of the vehicle 1100 and processes data, thereby performing overall monitoring of the vehicle 1100. The processor 1101 can be a CPU, GPU, network processor (NP), etc., and can implement or execute the methods, steps, and logic diagrams disclosed in the embodiments of this application.

[0210] In this embodiment of the application, the processor 1101 in the vehicle 1100 will load the computer program corresponding to the process of one or more applications into the memory 1102 according to the following steps, and the processor 1101 will run the applications stored in the memory 1102 to execute the control method.

[0211] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0212] Optionally, as shown in Figure 12, the vehicle 1100 further includes: a touch screen display 1103, a radio frequency circuit 1104, an audio circuit 1105, an input unit 1106, and a power supply 1107. The processor 1101 is electrically connected to the touch screen display 1103, the radio frequency circuit 1104, the audio circuit 1105, the input unit 1106, and the power supply 1107. Those skilled in the art will understand that the vehicle structure shown in Figure 12 does not constitute a limitation on the vehicle and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0213] The touch display screen 1103 can be used to display a graphical user interface (GUI) and receive operation commands generated by the user interacting with the GUI. The touch display screen 1103 may include a display panel and a touch panel. The display panel can be used to display information input by the user or information provided to the user, as well as various graphical user interfaces of the vehicle. These graphical user interfaces can be composed of graphics, text, icons, video, and any combination thereof. Optionally, the display panel can be configured using a liquid crystal display (LCD), organic light-emitting diode (OLED), or other similar technologies. The touch panel can be used to collect touch operations performed by the user on or near it (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near the touch panel), generate corresponding operation commands, and execute the corresponding program according to the operation commands. Optionally, the touch panel may include two parts: a touch detection device and a touch controller. The touch detection device detects the user's touch location and the signal generated by the touch operation, transmitting the signal to the touch controller. The touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends it to the processor 1101. It can also receive and execute commands from the processor 1101. The touch panel can cover the display panel. When the touch panel detects a touch operation on or near it, it transmits the information to the processor 1101 to determine the type of touch event. Subsequently, the processor 1101 provides corresponding visual output on the display panel based on the type of touch event. In this embodiment, the touch panel and the display panel can be integrated into the touch display screen 1103 to achieve input and output functions. However, in some embodiments, the touch panel and the touch display screen 1103 can be implemented as two independent components to achieve input and output functions. That is, the touch display screen 1103 can also be used as part of the input unit 1106 to achieve input functions.

[0214] The radio frequency circuit 1104 can be used to transmit and receive radio frequency signals to establish wireless communication with network devices or other vehicles, and to transmit and receive signals with network devices or other vehicles.

[0215] Audio circuit 1105 can be used to provide an audio interface between the user and the vehicle via a speaker and a microphone. Audio circuit 1105 can convert received audio data into electrical signals and transmit them to the speaker, where the speaker converts them into sound signals for output. Conversely, the microphone converts collected sound signals into electrical signals, which are then received by audio circuit 1105, converted back into audio data, and processed by processor 1101 before being transmitted via radio frequency circuit 1104 to, for example, another vehicle, or output to memory 1102 for further processing. Audio circuit 1105 may also include an earphone jack to provide communication between external headphones and the vehicle.

[0216] The input unit 1106 can be used to receive input numbers, characters, or user characteristic information (such as fingerprints, iris, facial information, etc.), and to generate keyboard, mouse, joystick, optical, or trackball signal inputs related to user settings and function control.

[0217] Power supply 1107 is used to supply power to various components of vehicle 1100. Optionally, power supply 1107 can be logically connected to processor 1101 through a power management device, thereby enabling functions such as charging, discharging, and power consumption management through the power management device. Power supply 1107 may also include one or more DC or AC power supplies, recharging devices, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0218] Although not shown in Figure 12, vehicle 1100 may also include cameras, sensors, wireless fidelity devices, Bluetooth devices, etc., which will not be described in detail here.

[0219] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0220] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by a computer program, or by a computer program controlling related hardware. The computer program can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0221] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0222] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0223] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0224] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An acoustic system, characterized in that, The acoustic system includes: a controller and a noise control device, wherein: The controller is used to acquire an audio signal, filter out non-noise signals from the audio signal, and obtain a noise signal; The noise control device is used to generate and output a noise control signal based on the noise signal in order to reduce the noise signal.

2. The acoustic system according to claim 1, characterized in that, The acoustic system includes an error sensor, wherein: The controller is used to filter out non-noise signals from the sound signal using the error sensor to obtain a noise signal.

3. The acoustic system according to claim 1 or 2, characterized in that, The acoustic system includes a microphone, wherein: The controller is used to filter out non-noise signals from the sound signal through the microphone to obtain a reference sound signal; The controller is used to locate the position of the human ear and determine the noise signal based on the position of the human ear and the reference sound signal.

4. The acoustic system according to any one of claims 1 to 3, characterized in that, The noise control device includes a filter, wherein: The noise control device is used to input the noise signal into the filter to generate the noise control signal.

5. The acoustic system according to claim 4, characterized in that, in: The controller is configured to determine a reference noise signal based on the motion information corresponding to the vehicle, and update the filter coefficients in the filter based on the reference noise signal and the noise signal.

6. The acoustic system according to claim 5, characterized in that, in: The controller is configured to determine an error signal based on the reference noise signal and the noise signal; The controller is configured to update the filter coefficients in the filter based on the reference noise signal and the error signal.

7. The acoustic system according to any one of claims 1 to 6, characterized in that, The acoustic system also includes a sound field zoning device, wherein: The controller is used to respond to partitioning instructions and acquire the partition audio signal corresponding to each partition position; The sound field zoning device is used to play corresponding zone audio signals through speakers at each of the zoning locations.

8. The acoustic system according to claim 7, characterized in that, in: The controller is used to input audio signals into a preset set of partition filters to obtain partition audio signals corresponding to each partition position.

9. The acoustic system according to claim 7, characterized in that, The set of partitioned filters includes partitioned filters corresponding to each partition location, wherein: The controller is used to control the speakers corresponding to each partition position to play the corresponding excitation source audio based on a preset excitation source control signal, and to obtain the partition filter parameters corresponding to each partition position according to the excitation source control signal and the excitation source audio.

10. The acoustic system according to claim 7, characterized in that, The acoustic system further includes a directional sound source device, wherein: The controller is used to perform compensation modulation processing on the navigation audio signal when it is identified as a navigation audio signal, so as to obtain a modulated signal. The directional sound source device is used to generate and play the navigation audio signal to the target partition location based on the modulated signal.

11. The acoustic system according to claim 10, characterized in that, in: The controller is used to perform distortion compensation on the navigation audio signal based on preset distortion information, and to perform frequency band modulation on the distortion-compensated navigation audio signal based on a preset frequency band to obtain a modulated signal.

12. The acoustic system according to claim 10, characterized in that, The directional sound source device includes an ultrasonic transducer, wherein: The directional sound source device is used to control the ultrasonic transducer to output the modulated signal based on the target partition location, so as to play the navigation audio signal to the target partition location.

13. The acoustic system according to any one of claims 1 to 12, characterized in that, The acoustic system also includes a privacy voice device, wherein: The privacy voice device is used to acquire voice signals from a privacy area in response to a privacy voice command; The controller is configured to generate a shielding signal based on the voice signal, and control the speaker in the non-privacy area to output the shielding signal, so as to shield the voice signal of the privacy area in the non-privacy area.

14. A control method, characterized in that, The control method is applied to a controller in an acoustic system, the acoustic system further including a noise control device, and the method includes: Acquire a sound signal, filter out non-noise signals from the sound signal to obtain a noise signal; The noise signal is sent to the noise control device, so that the noise control device generates and outputs a noise control signal based on the noise signal to reduce the noise signal.

15. The control method according to claim 14, characterized in that, The acoustic system includes an error sensor, and the step of filtering out non-noise signals from the sound signal to obtain a noise signal includes: The noise signal is obtained by filtering out non-noise signals from the sound signal using the error sensor.

16. The control method according to claim 14 or 15, characterized in that, The acoustic system includes a microphone, and the step of filtering out non-noise signals from the sound signal to obtain a noise signal includes: A reference sound signal is obtained by filtering out non-noise signals from the sound signal using the microphone. The location of the human ear is determined, and the noise signal is determined based on the location of the human ear and the reference sound signal.

17. The control method according to any one of claims 14 to 16, characterized in that, The noise control device includes a filter, and the method further includes: Obtain the vehicle's motion information; Based on the motion information, a reference noise signal is determined; Based on the reference noise signal and the noise signal, the filter coefficients in the filter are updated so that the noise control device inputs the reference noise signal into the filter to generate the noise control signal.

18. The control method according to claim 17, characterized in that, The step of updating the filter coefficients in the filter based on the reference noise signal and the noise signal includes: Based on the reference noise signal and the noise signal, an error signal is determined; The filter coefficients in the filter are updated based on the reference noise signal and the error signal.

19. The control method according to any one of claims 14 to 18, characterized in that, The acoustic system further includes a sound field zoning device, and the method further includes: In response to the partitioning command, the audio signal is input into a preset set of partitioning filters to obtain the partitioned audio signal corresponding to each partition position; The partitioned audio signal is sent to the sound field partitioning device so that the sound field partitioning device plays the corresponding partitioned audio signal through the speaker corresponding to each partition position.

20. The control method according to claim 19, characterized in that, Before responding to the partitioning command and inputting the audio signal into a preset set of partitioning filters to obtain the partitioned audio signal corresponding to each partition position, the process includes: Based on the preset excitation source control signal, the speaker at each partition position plays the corresponding excitation source audio. Based on the excitation source control signal and the excitation source audio, the partition filter parameters corresponding to each partition position are obtained, and a preset partition filter set is obtained.

21. The control method according to any one of claims 14 to 20, characterized in that, The acoustic system further includes a directional sound source device, and the method further includes: When the partition audio signal is identified as a navigation audio signal, the navigation audio signal is subjected to compensation modulation processing to obtain the modulated signal; The modulated signal is sent to the directional sound source device, so that the directional sound source device generates and plays the navigation audio signal to the target partition location based on the modulated signal.

22. The control method according to claim 21, characterized in that, The process of compensating and modulating the navigation audio signal to obtain the modulated signal includes: Based on preset distortion information, the navigation audio signal is distorted and compensated, and the distorted navigation audio signal is frequency-modulated based on a preset frequency band to obtain a modulated signal.

23. The control method according to any one of claims 14 to 22, characterized in that, The acoustic system also includes a privacy voice device, and the method further includes: Receive the voice signal of the privacy area acquired by the privacy voice device in response to the privacy voice command; Generate a shielding signal based on the voice signal; The speaker in the non-privacy area is controlled to output the shielding signal to shield the voice signal of the privacy area within the non-privacy area.

24. An acoustic device, characterized in that, The acoustic device includes: one or more processors and a memory; and one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to implement the control method of any one of claims 14 to 23.

25. A computer-readable storage medium, characterized in that, It stores computer instructions, which are loaded by a processor to execute the steps of the control method according to any one of claims 14 to 23.

26. A vehicle, characterized in that, It includes the acoustic system according to any one of claims 1-13, and the acoustic device according to claim 24.

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