CN114937460A - Active noise reduction method, system and related device - Google Patents
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Abstract
The application discloses an active noise reduction method, an active noise reduction system and a related device, wherein the method is applied to a vehicle, the vehicle comprises a plurality of loudspeakers and at least one microphone, and the active noise reduction method comprises the following steps: obtaining a current audio signal collected by each microphone and a mixed audio signal transmitted to the corresponding microphone by an original audio signal emitted by each loudspeaker in a first loudspeaker set corresponding to each microphone; wherein transfer errors between all of the speakers in the first set of speakers and the corresponding microphones are not greater than a threshold; and the larger the transfer error is, the smaller the low-frequency influence of the loudspeaker related to the transfer error on the microphone is; obtaining an error audio signal based on the current audio signal of each of the microphones and the mixed audio signal; a noise reducing audio signal is obtained based on the error audio signal. By the method, the noise reduction effect can be improved, and the noise reduction cost can be saved.
Description
Technical Field
The present application relates to the field of active noise control technologies, and in particular, to an active noise reduction method, system, and related apparatus.
Background
With the continuous development of technologies in the field of automobile noise control, more and more mass-produced automobile models are equipped with active noise reduction technologies for noise in automobiles. The working principle is that sound waves with the same amplitude and the opposite phase with the sound waves of the external noise are generated through the noise reduction system, so that the external noise is neutralized, and the noise reduction effect is achieved.
However, the noise inside the vehicle is often a superposition of two sound types, one is engine noise, road noise, wind noise and the like which need to be removed, and the other is music, sound effect sound and the like which need to be reserved. The existing in-vehicle active noise reduction technology cannot distinguish the type of sound in a vehicle, and other sounds except noise can be offset and attenuated in the noise reduction process, so that the experience of drivers or passengers in the vehicle is influenced.
Disclosure of Invention
The technical problem mainly solved by the application is to provide an active noise reduction method, system and related device, which can improve the noise reduction effect and save the noise reduction cost.
In order to solve the technical problem, the application adopts a technical scheme that: an active noise reduction method is provided, which is applied to a vehicle including a plurality of speakers and at least one microphone, and includes: obtaining a current audio signal collected by each microphone and a mixed audio signal transmitted to the corresponding microphone by an original audio signal emitted by each loudspeaker in a first loudspeaker set corresponding to each microphone; wherein transfer errors between all of the speakers in the first set of speakers and the corresponding microphones are not greater than a threshold; the larger the transfer error is, the smaller the low-frequency influence of the loudspeaker related to the transfer error on the microphone is; obtaining an error audio signal based on the current audio signal of each of the microphones and the mixed audio signal; a noise reduction audio signal is obtained based on the error audio signal.
In order to solve the technical problem, the other technical scheme adopted by the application is as follows: an active noise reduction system is provided, comprising: a first obtaining module, configured to obtain a current audio signal acquired by each microphone and a mixed audio signal obtained by transferring, to a corresponding microphone, an original audio signal sent by each speaker in a first speaker set corresponding to each microphone; wherein transfer errors between all of the speakers in the first set of speakers and the corresponding microphones are not greater than a threshold; and the larger the transfer error is, the smaller the low-frequency influence of the loudspeaker related to the transfer error on the microphone is; a second obtaining module, configured to obtain an error audio signal based on the current audio signals of all the microphones and the mixed audio signal; a third obtaining module, configured to obtain a noise reduction audio signal based on the error audio signal.
In order to solve the above technical problem, the present application adopts another technical solution: there is provided an electronic device comprising a memory and a processor coupled to each other, wherein the memory stores program instructions, and the processor is configured to execute the program instructions to implement the active noise reduction method in the foregoing technical solution.
In order to solve the above technical problem, the present application adopts another technical solution: there is provided a storage device storing program instructions executable by a processor, the program instructions being configured to implement the active noise reduction method according to the above-mentioned technical solution.
The beneficial effect of this application is: different from the situation of the prior art, the active noise reduction method provided by the application can effectively keep effective sound in the vehicle while reducing noise in the vehicle. In addition, the combination of the loudspeaker and the microphone in the vehicle is screened to obtain the combination of the loudspeaker and the microphone which needs to be subjected to audio compensation, so that the noise reduction process can be effectively simplified, and the active noise reduction efficiency in the vehicle is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:
FIG. 1 is a schematic flow chart diagram illustrating an embodiment of an active noise reduction method according to the present application;
FIG. 2 is a schematic flow chart of an embodiment before step S101;
FIG. 3 is a schematic structural diagram of an embodiment of an active noise reduction system of the present application;
FIG. 4 is a schematic structural diagram of an embodiment of an electronic device of the present application;
fig. 5 is a schematic structural diagram of an embodiment of a memory device according to the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a schematic flow chart diagram illustrating an embodiment of an active noise reduction method according to the present application, the method including:
s101: and obtaining a current audio signal collected by each microphone and a mixed audio signal transmitted to the corresponding microphone by the original audio signal emitted by each loudspeaker in the first loudspeaker set corresponding to each microphone.
Step S101 includes: for each microphone, a corresponding first set of speakers is screened out of all speakers. Referring to fig. 2, fig. 2 is a schematic flowchart of an embodiment before step S101, and a specific implementation process includes:
s201: transfer errors between each speaker and each microphone in the vehicle are obtained.
Specifically, the implementation process of step S201 includes: in response to the vehicle being in a stationary state, i.e., no engine noise, road noise, wind noise, etc. are present in the vehicle. When all the loudspeakers in the vehicle respectively emit first noise signals, second noise signals collected by each microphone in the vehicle are obtained. Specifically, before all speakers respectively emit first noise signals, white noise signals of a predetermined frequency are set, and low-pass filtering processing is performed on the white noise signals to obtain the first noise signals. The signal frequency of the first noise signal is lower than a preset cut-off frequency. In the present embodiment, the preset cut-off frequency is 500Hz, but in other embodiments, the preset cut-off frequency may be set according to actual situations. Further, sending the first noise signal to all the loudspeakers in the vehicle, and sending out the first noise signal by one loudspeaker at a time; at this time, each microphone collects the first noise signal as the second sound signal. Based on the fact that a plurality of microphones and a plurality of loudspeakers are arranged in the vehicle, each microphone acquires a second noise signal aiming at each loudspeaker.
Further, a transfer error between each speaker and each microphone is obtained based on the first noise signal and the second noise signal. Specifically, a transfer function between each speaker and each microphone is first acquired. The obtaining of the transfer function between the speaker and the microphone may be implemented by the prior art, and will not be described herein too much. Further, the transfer function is convoluted with the first noise signal emitted by the loudspeaker corresponding to the transfer function to obtain a third noise signal. And after the third noise signal is obtained, obtaining a fourth noise signal according to the corresponding second noise signal and the third noise signal collected by the microphone corresponding to the transfer function. The fourth noise signal is a part of the second noise signal, which does not include the third noise signal. Finally, the ratio of the fourth noise signal to the second noise signal is taken as the transfer error. The combination of the loudspeaker and the microphone with large low-frequency influence can be screened out by calculating the transfer error between each loudspeaker and each microphone.
For example, the step of obtaining the transfer error between the kth speaker and the ith microphone comprises: and controlling the kth loudspeaker to send out a first noise signal, and acquiring a second noise signal acquired by the ith microphone at the moment. And obtaining a transfer function between the kth loudspeaker and the ith microphone, and convolving the transfer function with the first noise signal emitted by the kth loudspeaker to obtain a third noise signal. And taking the part of the second noise signal, which does not contain the third noise signal, as a fourth noise signal, and taking the ratio of the fourth noise signal to the second noise signal as the transfer error between the kth loudspeaker and the ith microphone.
In one embodiment, the transfer error between the kth loudspeaker and the ith microphone at time n is calculatedErrorH ik The formula (c) is as follows:
in the above formula, i is the number of in-vehicle microphones, k is the number of in-vehicle speakers,MicWhiteNosie i (n)representing the second noise signal picked up by the ith microphone,H ik (n)representing the transfer function of the kth loudspeaker with respect to the ith microphone, ⊗ representing the sign of the convolution operation,FilterWhiteNosie(n)which is representative of a first noise signal, is,H ik (n)⊗FilterWhiteNosie(n)representing a third noise signal.
S202: a first set of speakers is obtained based on all transfer error filters associated with the microphones.
Specifically, the implementation process of step S202 includes: for each microphone, a first set of speakers is obtained based on all transfer error filters associated with the microphone. The transfer errors of all the loudspeakers in the first loudspeaker set relative to the current microphone are not larger than a threshold value, namely, the loudspeakers corresponding to the transfer errors smaller than or equal to the threshold value are used as the first loudspeaker set; and, the larger the transfer error, the smaller the low frequency effect of the speaker associated with the transfer error on the corresponding microphone. In this embodiment, the threshold value ranges from 0 to 1, and the specific value may be determined according to actual requirements. The comparison of the transmission error and the threshold value is helpful for screening out the loudspeaker with larger influence on the low frequency of the corresponding microphone, so as to be helpful for subsequently reducing the operation amount of a DSP (Digital Signal Processing) chip and improving the active noise reduction efficiency.
It should be noted that, in the whole active noise reduction method, the step of obtaining the first speaker set by screening only needs to be performed once.
Further, in this embodiment, the specific implementation process of step S101 includes: and obtaining the current audio signal collected by each microphone, wherein the current audio signal comprises all sound signals in the vehicle which can be collected by the current microphone.
Further, a mixed audio signal is obtained, wherein the mixed audio signal is transmitted to the corresponding microphone by the original audio signal emitted by each loudspeaker in the first loudspeaker set corresponding to each microphone. The specific process comprises the following steps: first, a first set of transfer functions between each loudspeaker in a first set of loudspeakers corresponding to each microphone and the corresponding microphone is obtained. The transfer function may be obtained by the prior art, and will not be described herein. Furthermore, for each microphone, performing convolution operation on a transfer function in the first transfer function set corresponding to the microphone and an original audio signal sent by a corresponding loudspeaker, and superposing all the convolved results to obtain a corresponding mixed audio signal collected by each microphone. In the present embodiment, the original audio signal is a sound such as a musical sound or a sound effect sound in the vehicle, which does not require active noise reduction processing, and the original audio signal is subjected to tuning processing.
In one embodiment, the mixed audio signal at the ith microphone at time n is calculatedMicSound i (n)The formula of (1) is as follows:
in the above formula, the first and second carbon atoms are,H ij (n)representing the transfer function of the jth speaker and ith microphone, ⊗ is the convolution operator,SpkSound j (n)representing the original audio signal emitted by the jth speaker, J being the total number of speakers in the first set of speakers.
It should be noted that, in practical applications, the current audio signal may be acquired first and then the mixed audio signal may be acquired, or the mixed audio signal may be acquired first and then the current audio signal is acquired.
S102: an error audio signal is obtained based on the current audio signal of each microphone and the mixed audio signal.
The implementation process of step S102 includes: as can be seen from the above step S101, the current audio signal of each microphone includes all the sounds that can be collected in the vehicle. By combining with a calculation method of an error audio signal in a feedforward FxLMS adaptive algorithm, the error audio signal can be obtained based on the current audio signal and the mixed audio signal of each microphone; namely, for each microphone, the part, which does not contain the corresponding mixed audio signal, of the current audio signal collected by the microphone is used as an error audio signal, so that the sound which does not need to be denoised in the vehicle is retained in the subsequent denoising process, and the denoising effect is further optimized.
In one embodiment, the audio signal is mixed in step S101MicSound i (n)Calculating an error audio signal of the ith microphoneError i (n)The formula (c) is as follows:
in the above formula, the first and second carbon atoms are,MicSum i (n)representing the current audio signal picked up by the ith microphone.
S103: a noise reduction audio signal is obtained based on the error audio signal.
Specifically, the implementation process of step S103 includes: at each time of obtainingError audio signal of microphoneError i (n)Thereafter, the error audio signal is utilizedError i (n)And determining the optimal control parameters, and calculating the noise reduction audio signal in real time based on the optimal control parameters. Further, the noise reduction audio signal is sent to a noise reduction module to emit noise reduction sound waves, so that active noise reduction is achieved. The number and the installation position of the noise reduction modules can be set according to actual conditions so as to achieve better noise reduction effect. Specifically, an error audio signal of each microphone to be acquiredError i (n)And substituting the signal into a feedforward FxLMS adaptive algorithm to calculate and obtain a noise reduction audio signal, wherein the specific process is not described in detail. In addition, in this embodiment, the noise reduction module may be a noise reduction speaker for emitting noise reduction sound waves with equal amplitude and opposite phase to the noise sound waves to cancel the noise.
The active noise reduction method provided by the application can effectively keep effective sound in the vehicle while reducing noise in the vehicle. In addition, the combination of the loudspeaker and the microphone in the vehicle is screened to obtain the combination of the loudspeaker and the microphone which needs to be subjected to audio compensation, so that the noise reduction process can be effectively simplified, and the active noise reduction efficiency in the vehicle is improved.
In an embodiment, in the actual active noise reduction process of the vehicle interior, the current audio signal collected by the vehicle interior microphone further includes a noise reduction audio signal sent by the noise reduction module, so that the current audio signal collected by the i-th microphone in the vehicle interior in step S101MicSum i (n)Can be calculated by the following formula:
in the above formula, the first and second carbon atoms are,MicNoise i (n)represents the in-vehicle noise collected by the ith microphone,MicSound i (n)representing the mixed audio signal picked up by the ith microphone,MicAntiNoise i (n)representing noise-reduced audio signals collected by the ith microphoneNumber (n).
Further, in the feedforward FxLMS adaptive algorithm, the error audio signalError i (n)The calculation formula of (a) is as follows:
combining the above formula and mixing the audio signals in step S101MicSound i (n)The error audio signal without the mixed audio signal in step S102 can be obtained by the calculation formulaError i (n)In the process of actively reducing the noise in the vehicle, the noise which is not required to be reduced is reserved.
In another embodiment, when the in-vehicle noise is reduced at the initial time, all sounds that can be collected by the in-vehicle microphone are used as error audio signals, and the initial noise reduction audio signals are obtained based on the feedforward FxLMS adaptive algorithm, and are sent out by the in-vehicle noise reduction module. Then, steps S102-S103 in the above embodiment are performed to update the initial noise reduction audio signal in real time and improve the noise reduction effect.
In yet another embodiment, a portion of the speakers and noise reduction module in the vehicle may both emit noise reduction audio signals to achieve active noise reduction in the vehicle. In particular, the speakers in the vehicle may be classified into a first type speaker and a second type speaker. The first type of loudspeaker can be used for emitting original audio signals after tuning processing, and the second type of loudspeaker can be used for emitting original audio signals after tuning processing and noise reduction audio signals. And after the noise reduction audio signal is obtained, the noise reduction audio signal is sent to the second type of loudspeaker and/or the noise reduction module, and the second type of loudspeaker and/or the noise reduction module sends noise reduction sound waves to realize active noise reduction in the vehicle.
When the speakers in the vehicle are classified into the first type of speaker and the second type of speaker, the mixed audio signal at the ith microphone at the n-th time is calculated in step S202MicSound i (n)The formula is as follows:
in the above formula, P is the total number of the first type of speakers in the first speaker set, Q is the total number of the second type of speakers in the first speaker set,H ip representing the transfer function of the p first type loudspeaker and the i microphone,H iq representing the transfer function of the qth loudspeaker of the second type and the ith microphone,SpkSound p (n)representing the original audio signal emitted by the pth first type loudspeaker,SpkSound q (n)representing the original audio signal emitted by the qth loudspeaker of the second type.
Further, the error audio signal of the ith microphone in step S102 is combinedError i (n)In response to the in-vehicle speakers being classified into the first type of speaker and the second type of speaker, then in the present embodiment, the error audio signal of the i-th microphone is calculatedError i (n)The formula of (1) is as follows:
the invention further provides an active noise reduction system, and particularly please refer to fig. 3, where fig. 3 is a schematic structural diagram of an embodiment of the active noise reduction system of the present application. The active noise reduction system that this application proposed includes: a first obtaining module 10, a second obtaining module 20 and a third obtaining module 30. The first obtaining module 10 is configured to obtain a current audio signal collected by each microphone, and a mixed audio signal obtained by transferring, to a corresponding microphone, an original audio signal emitted by each speaker in a first speaker set corresponding to each microphone, to an original audio signal emitted by each speaker. Wherein transfer errors between all speakers in the first set of speakers and corresponding microphones are not greater than a threshold; and the larger the transfer error, the smaller the low frequency impact of the loudspeaker associated with the transfer error on the corresponding microphone. Specifically, the step of obtaining the mixed audio signal includes: obtaining a first set of transfer functions between each loudspeaker in a first loudspeaker set corresponding to each microphone and the corresponding microphone; for each microphone, performing convolution operation on the transfer function in the first transfer function set corresponding to the microphone and the original audio signal sent by the corresponding loudspeaker, and superposing all the convolution results to obtain the mixed audio signal corresponding to each microphone.
The second obtaining module 20 is configured to obtain an error audio signal based on the current audio signal of each microphone and the mixed audio signal. Specifically, for each microphone, a portion of the current audio signal collected by the microphone that does not include the corresponding mixed audio signal is taken as an error audio signal.
The third obtaining module 30 is configured to obtain a noise reduction audio signal based on the error audio signal.
The active noise reduction system provided by the present application further includes a screening module 12, coupled to the first obtaining module 10, for screening out, for each microphone, a corresponding first speaker set from all speakers before obtaining a current audio signal collected by each microphone and a mixed audio signal transmitted by each speaker in the first speaker set corresponding to each microphone, where the mixed audio signal is transmitted to the corresponding microphone from an original audio signal emitted by each speaker in the first speaker set.
The active noise reduction system of the present application further includes a transmission error calculation module 14 coupled to the filtering module 12. The transmission error calculation module 14 is configured to obtain a second noise signal collected by any microphone in the vehicle when the speakers in the vehicle respectively emit the first noise signals in response to that the vehicle is in a stationary state. The signal frequency of the first noise signal is lower than a preset cut-off frequency. Transfer errors between each speaker and each microphone are obtained based on the first noise signal and the second noise signal. Specifically, a transfer function between each speaker and each microphone is obtained, and the transfer function is convolved with the first noise signal emitted by the corresponding speaker to obtain a third noise signal. And obtaining a fourth noise signal according to the second noise signal and the third noise signal acquired by the transfer function corresponding to the microphone. The fourth noise signal is a part of the second noise signal, which does not include the third noise signal. And taking the ratio of the fourth noise signal to the second noise signal as a transfer error.
For each microphone, the filtering module 12 filters a first set of speakers based on all transfer errors associated with the microphone. Wherein the transfer error of all speakers in the first set of speakers with respect to the current microphone is not greater than a threshold.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an embodiment of an electronic device according to the present application, where the electronic device includes a memory 50 and a processor 60 that are coupled to each other, the memory 50 stores program instructions, and the processor 60 is configured to execute the program instructions to implement the steps of the active noise reduction method in the foregoing embodiment. Specifically, electronic devices include, but are not limited to: desktop computers, notebook computers, tablet computers, servers, etc., without limitation thereto. Further, the processor 60 may also be referred to as a CPU (Central Processing Unit). The processor 60 may be an integrated circuit chip having signal processing capabilities. The Processor 60 may also be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. In addition, the processor 60 may be commonly implemented by integrated circuit chips.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an embodiment of a storage device according to the present disclosure, in which the storage device 70 stores a program instruction 80 capable of being executed by a processor, and the program instruction 80 is used for implementing an active noise reduction method in any of the above embodiments.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (9)
1. An active noise reduction method applied to a vehicle including a plurality of speakers and at least one microphone, the active noise reduction method comprising:
obtaining a current audio signal collected by each microphone and a mixed audio signal transmitted to the corresponding microphone by an original audio signal emitted by each loudspeaker in a first loudspeaker set corresponding to each microphone; wherein transfer errors between all of the speakers in the first set of speakers and the corresponding microphones are not greater than a threshold; the larger the transfer error is, the smaller the low-frequency influence of the loudspeaker related to the transfer error on the microphone is;
obtaining an error audio signal based on the current audio signal of each of the microphones and the mixed audio signal;
obtaining a noise reduction audio signal based on the error audio signal;
the step of obtaining the original audio signals emitted by the speakers in the first speaker set corresponding to each microphone and transferring the original audio signals to the mixed audio signals corresponding to the microphone includes: obtaining a first set of transfer functions between each loudspeaker in a first set of loudspeakers corresponding to each microphone and the corresponding microphone; for each microphone, performing convolution operation on the transfer function, corresponding to the microphone, in the first transfer function set and the original audio signal sent by the corresponding loudspeaker, and superposing all convolution results to obtain the mixed audio signal corresponding to each microphone.
2. The active noise reduction method according to claim 1, wherein the step of obtaining the current audio signal collected by each of the microphones and the original audio signals emitted by the speakers in the first speaker set corresponding to each of the microphones is preceded by the step of transferring the original audio signals to the mixed audio signal corresponding to the microphone, the step of obtaining the current audio signal collected by each of the microphones and the original audio signals emitted by the speakers in the first speaker set corresponding to each of the microphones comprises:
for each of the microphones, a corresponding first set of speakers is screened from all of the speakers.
3. The active noise reduction method of claim 2, wherein the step of screening out the corresponding first set of speakers from all of the speakers comprises:
when all loudspeakers in the vehicle respectively send out first noise signals in response to the fact that the vehicle is in a static state, obtaining second noise signals collected by any microphone in the vehicle; obtaining a transfer error between each of the speakers and each of the microphones based on the first noise signal and the second noise signal;
for each of the microphones, obtaining a first set of speakers based on all of the delivery error filters associated with the microphone; wherein the transfer error of all the speakers in the first set of speakers relative to the current microphone is not greater than the threshold.
4. The active noise reduction method of claim 3, wherein the step of obtaining a transfer error between each speaker and each microphone based on the first noise signal and the second noise signal comprises:
obtaining a transfer function between each loudspeaker and each microphone;
performing convolution operation on the transfer function and a first noise signal emitted by a corresponding loudspeaker to obtain a third noise signal;
obtaining a fourth noise signal corresponding to the second noise signal and the third noise signal acquired by the microphone according to the transfer function; wherein the fourth noise signal is a portion of the second noise signal that does not include the third noise signal;
and taking the ratio of the fourth noise signal to the second noise signal as a transfer error.
5. The active noise reduction method of claim 3,
the signal frequency of the first noise signal is lower than a preset cut-off frequency.
6. The active noise reduction method of claim 1, wherein the step of obtaining an error audio signal based on the current audio signal of each of the microphones and the mixed audio signal comprises:
and for each microphone, taking a part which is acquired by the microphone and does not contain the corresponding mixed audio signal in the current audio signal as the error audio signal.
7. An active noise reduction system, comprising:
a first obtaining module, configured to obtain a current audio signal acquired by each microphone and a mixed audio signal obtained by transferring, to a corresponding microphone, an original audio signal sent by each speaker in a first speaker set corresponding to each microphone; wherein a transfer error between all of the speakers in the first set of speakers and the corresponding microphones is not greater than a threshold; and the larger the transfer error is, the smaller the low-frequency influence of the loudspeaker related to the transfer error on the corresponding microphone is;
a second obtaining module, configured to obtain an error audio signal based on the current audio signal of each of the microphones and the mixed audio signal;
a third obtaining module, configured to obtain a noise reduction audio signal based on the error audio signal.
8. An electronic device comprising a memory and a processor coupled to each other, the memory having stored therein program instructions, the processor being configured to execute the program instructions to implement the active noise reduction method according to any one of claims 1 to 6.
9. A memory device storing program instructions executable by a processor for implementing the active noise reduction method of any one of claims 1 to 6.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210854874.8A CN114937460B (en) | 2022-07-20 | 2022-07-20 | Active noise reduction method, system and related device |
| PCT/CN2022/144168 WO2024016609A1 (en) | 2022-07-20 | 2022-12-30 | Active noise reduction method and system, and related apparatus |
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| WO2024016609A1 (en) * | 2022-07-20 | 2024-01-25 | 科大讯飞(苏州)科技有限公司 | Active noise reduction method and system, and related apparatus |
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| CN114937460B (en) * | 2022-07-20 | 2022-11-18 | 科大讯飞(苏州)科技有限公司 | Active noise reduction method, system and related device |
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| CN114937460B (en) | 2022-11-18 |
| WO2024016609A1 (en) | 2024-01-25 |
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