CN113299262A - Active noise reduction method and device, earphone, readable storage medium and electronic equipment - Google Patents
Active noise reduction method and device, earphone, readable storage medium and electronic equipment Download PDFInfo
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- CN113299262A CN113299262A CN202110559640.6A CN202110559640A CN113299262A CN 113299262 A CN113299262 A CN 113299262A CN 202110559640 A CN202110559640 A CN 202110559640A CN 113299262 A CN113299262 A CN 113299262A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17853—Methods, e.g. algorithms; Devices of the filter
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1083—Reduction of ambient noise
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
- G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
- H04R2460/01—Hearing devices using active noise cancellation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Headphones And Earphones (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The application provides an active noise reduction method and device, an earphone, a readable storage medium and an electronic device. According to the method and the device, a first noise reduction signal is determined according to an original noise signal and a first noise reduction parameter collected by a reference microphone, and a second noise reduction signal is determined according to a residual noise signal and a second noise reduction parameter collected by an error microphone, so that a loudspeaker is driven based on the two noise reduction signals to reduce noise of a target area of active noise reduction equipment such as an earphone. The active noise reduction scheme can ensure the noise reduction width and the noise reduction depth simultaneously through a mixed noise reduction mode, and the active noise reduction effect is improved.
Description
Technical Field
The application relates to the technical field of audio signal processing, in particular to an active noise reduction method, an active noise reduction device, an earphone, a readable storage medium and electronic equipment.
Background
In the field of Active Noise Cancellation (ANC), feedforward Active Noise reduction schemes are most commonly used. However, in feedforward active noise reduction, the reference microphone for collecting the ambient noise is closer to the original noise source relative to the target noise reduction region, so the noise reduction width (the frequency range capable of noise reduction) is larger, but the noise reduction depth (the sound pressure level capable of noise reduction) is generally lower because the noise level after noise reduction cannot be reflected.
Disclosure of Invention
The application aims at the defects of the prior art and provides an active noise reduction method, an active noise reduction device, an earphone, a readable storage medium and electronic equipment. The technical scheme is specifically adopted in the application.
First, to achieve the above object, an active noise reduction method is provided, which includes: determining a first noise reduction signal according to an original noise signal acquired by a reference microphone and a first noise reduction parameter; determining a second noise reduction signal according to the residual noise signal acquired by the error microphone and the second noise reduction parameter; and driving a loudspeaker based on the first noise reduction signal and the second noise reduction signal, and reducing noise of a target area corresponding to the error microphone.
Optionally, the active noise reduction method according to any of the above, wherein determining the second noise reduction signal according to the residual noise signal collected by the error microphone and the second noise reduction parameter includes: determining a secondary path estimation signal according to the initial second noise reduction signal and the secondary acoustic path parameters; determining a bias signal between the residual noise signal and the secondary path estimate signal; and determining an updated second noise reduction signal according to the deviation signal and the second noise reduction parameter.
Optionally, the active noise reduction method according to any of the above, further includes: determining updated secondary acoustic path parameters based on the initial second noise reduction signal and the deviation signal; determining an updated secondary path estimate signal based on the updated second noise reduction signal and the updated secondary acoustic path parameters.
Optionally, the active noise reduction method according to any of the above, wherein determining updated secondary acoustic path parameters based on the initial second noise reduction signal and the deviation signal includes: determining the secondary path estimation signal according to the superposed signal of the signal to be played and the initial second noise reduction signal which are not correlated with the noise signal and the secondary acoustic path parameter; determining the bias signal based on the residual noise signal and the secondary path estimation signal; determining the updated secondary acoustic path parameter based on the superposition signal and the deviation signal.
Optionally, the active noise reduction method according to any of the above, further includes: determining the first noise reduction parameter according to the original noise signal and the secondary acoustic path parameter, and the residual noise signal.
Meanwhile, in order to achieve the above object, the present application further provides an active noise reduction device, which includes: the first determining module is used for determining a first noise reduction signal according to an original noise signal acquired by a reference microphone and a first noise reduction parameter; the second determining module is used for determining a second noise reduction signal according to the residual noise signal acquired by the error microphone and the second noise reduction parameter; and the mixed noise reduction module is used for driving a loudspeaker based on the first noise reduction signal and the second noise reduction signal and reducing noise of a target area corresponding to the error microphone.
Simultaneously, for realizing above-mentioned purpose, this application still provides an earphone of making an uproar falls in initiative, and it includes: the reference microphone is used for acquiring an original noise signal outside the ear of the user; the error microphone is used for collecting residual noise signals in the ears of the user; the feedforward filter is used for carrying out noise reduction filtering on the original noise signal and outputting a feedforward noise reduction signal; the feedback filter is used for carrying out noise reduction filtering on the residual noise signal and outputting a feedback noise reduction signal; and the loudspeaker is used for responding to the feedforward noise reduction signal and the feedback noise reduction signal and sending noise reduction sound waves.
Optionally, the active noise reduction headphone is as described in any above, wherein the feedforward filter is an adaptive filter.
Also, to achieve the above object, the present application further provides a computer readable storage medium comprising computer instructions stored thereon, which, when executed by a processor, cause the processor to perform the active noise reduction method as described in any one of the above.
Meanwhile, in order to achieve the above object, the present application also provides an electronic device, which includes: a processor; a memory comprising computer instructions stored thereon which, when executed by the processor, cause the processor to perform the active noise reduction method as in any one of the above.
Advantageous effects
According to the method, on the basis that a feedforward ANC scheme determines a first noise reduction signal according to an original noise signal and a first noise reduction parameter acquired by a reference microphone, a second noise reduction signal is further determined according to a residual noise signal and a second noise reduction parameter acquired by an error microphone, and therefore a loudspeaker is driven based on the two noise reduction signals to reduce noise of a target area of active noise reduction equipment such as an earphone. The active noise reduction scheme can ensure the noise reduction width and the noise reduction depth simultaneously through a mixed noise reduction mode, and the active noise reduction effect is improved.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application.
Drawings
The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application and not limit the application. In the drawings:
FIG. 1 is a schematic diagram of a basic principle framework of an active noise reduction earphone implemented according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a basic principle framework of an active noise reduction headphone implemented according to another embodiment of the present application;
FIG. 3 is a block diagram of signal processing for the active noise reduction earphone of FIG. 2;
FIG. 4 is a block diagram of signal processing for an active noise reduction headphone implemented according to yet another embodiment of the present application;
fig. 5 is a block diagram of signal processing for an active noise reduction headphone implemented according to yet another embodiment of the present application.
Detailed Description
In order to make the purpose and technical solutions of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It should be apparent that the described embodiments are only some of the 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 described embodiments of the application without any inventive step, are within the scope of protection of the application.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The term "connected" as used herein may mean either a direct connection between components or an indirect connection between components via other components.
It should be noted that, the method of the present application is exemplarily illustrated with an active noise reduction headphone as an execution subject, and the steps and flows related to the method of the present application are described by an active noise reduction headphone circuit framework, but the method is also applicable in the context of other active noise reduction devices besides headphones.
Fig. 1 shows a basic frame of an active noise reduction ANC headphone implemented according to an embodiment of a method of the present application. The earphone is provided with two microphones: a reference microphone ref Mic and an error microphone err Mic, a loudspeaker, and a feedforward controller (i.e., a feedforward filter, corresponding to the first noise reduction parameter W)ff) And a feedback controller (i.e., a feedback filter, corresponding to the second noise reduction parameter W)fb). In the figure, the original noise signal collected by ref Mic is d (n), the first noise reduction signal (i.e., feedforward noise reduction signal) is y (n), the parameter of the secondary acoustic path (speaker to err Mic) is G, the parameter of the primary acoustic path (ref Mic to err Mic) is P, the residual noise signal collected by err Mic after noise reduction is e (n), and the second noise reduction signal (i.e., residual noise signal collected by err Mic after noise reduction is e (n))Feedback noise reduction signal) is b (n).
It should be noted that the dashed block diagram (P, G) in the drawings of the present application represents the real acoustic path in the sound cavity space of the earphone, and the dashed arrow represents the propagation of the acoustic signal in the corresponding space.
According to the active noise reduction method, noise reduction is performed on a target area where an error microphone is located in a mixed mode of feedforward noise reduction and feedback noise reduction, a feedforward noise reduction system processes noise which does not reach the target area in real time, and excellent noise reduction width can be guaranteed; meanwhile, the feedback noise reduction system processes noise of the target area after noise reduction in real time, and the integral noise reduction depth can be obviously improved.
In sum, the superposed signal of the first noise reduction signal and the second noise reduction signal drives the loudspeaker to play noise reduction sound waves, so that the noise reduction width and the noise reduction depth can be achieved, and the active noise reduction effect on the target area is improved.
Referring to fig. 1, the residual noise signal may be described in the frequency domain by:
[e(f)·Wfb(f)+y(f)]g (f) + d (f) p (f) ═ e (f) formula (1)
Obtaining by solution:
it can be seen that the residual noise signal is used as the input of the feedback controller, which is influenced by the open-loop transfer function W of the feedback systemfb(f) G (f), if it approaches 1 in a certain frequency band, the feedback system will be unstable.
To address this problem, the present application further provides an active noise reduction earphone frame shown in fig. 2 according to an embodiment of the method, and a corresponding signal processing process of the active noise reduction earphone frame is shown in fig. 3, where (the same as fig. 1 or corresponding parts are not described again):
an estimation unit for estimating parameters of the secondary acoustic path for characterizing the true secondary acoustic path transfer function by a circuit transfer function, called"Secondary path transfer function estimation".
In contrast to the previous embodiment, when the feedback noise reduction system determines the second noise reduction signal: based on the second noise reduction signal b (n) and
determining a secondary path estimation signal, determining a deviation signal e '(n +1) between the residual noise signal e (n +1) and the secondary path estimation signal, and determining a second noise reduction parameter W based on the deviation signal e' (n +1) and the second noise reduction parameter WfbA second noise reduction signal b (n +1) is determined. At this time, the input signal of the feedback controller is no longer a residual noise signal, but (frequency domain expression):
therefore, the method adds an estimation unit for the secondary acoustic path parameter in the feedback noise reduction system
So that no pole exists in the input signal of the feedback controller, and the stability of the feedback system in the embodiment is enhanced.
In the above scheme, the estimation of G is added in the feedback system
The method may be designed off-line before the earphone leaves the factory, or may be obtained by adaptive solution in the actual use process of the earphone, as shown in fig. 4: based on the second noise reduction signal b (n) and
determining a secondary path estimation signal, determining based on the second noise reduction signal b (n) and the deviation signal e' (n)
And based on the second noise reduction signal b (n +1) and
updating the secondary path estimation signal; thereafter, as in the previous embodiment, a deviation signal e '(n +2) between the residual noise signal e (n +2) and the secondary path estimation signal is determined, and based on the deviation signal e' (n +2) and the second noise reduction parameter WfbA second noise reduction signal b (n +2) is determined.
Adaptive solution
In the process of (a), the deviation signal e' (n) is used as one of the input signals of the adaptive link, and the other input signal of the adaptive link includes, in addition to the second noise reduction signal b (n), in some embodiments, an earphone to-be-played signal x (n) having no correlation with the noise signal may be superimposed, for example: a media audio signal or a speech signal.
The present application also provides an active noise reducing headphone frame as shown in fig. 5 according to a method embodiment. Unlike fig. 3, the feedforward filter in the active noise reduction headphone is set as an adaptive filter. In the adaptive link: based on the original noise signal d (n) and the preceding determination
Obtaining one input signal of the self-adaptive link, taking the residual noise signal e (n) as the other input signal of the self-adaptive link, iteratively updating the initial parameters of the feedforward controller through the residual noise signal e (n) and the residual noise signal e (n) until the energy of the residual noise signal e (n) converges to the minimum value, and determining the optimal first noise reduction parameter W at the momentff。
Based on the hybrid active noise reduction system provided by the embodiment of the present application shown in fig. 3 and 4, the feedforward noise reduction system is implemented as the adaptive feedforward noise reduction system shown in fig. 5, which can accelerate the convergence speed of the adaptive link and enter the optimal control state earlier than the general adaptive feedforward noise reduction system.
The present application further provides an active noise reduction device, which includes:
the first determining module is used for determining a first noise reduction signal according to the original noise signal acquired by the reference microphone and a first noise reduction parameter of the feedforward controller;
the second determining module is used for determining a second noise reduction signal according to the residual noise signal acquired by the error microphone and a second noise reduction parameter of the feedback controller;
and the mixed noise reduction module is used for driving the loudspeaker based on the first noise reduction signal and the second noise reduction signal and reducing noise of a target area corresponding to the error microphone.
The specific steps of determining the second noise reduction signal by the second determining module according to the residual noise signal collected by the error microphone and the second noise reduction parameter may be as follows:
firstly, determining a secondary path estimation signal according to an initial second noise reduction signal and a secondary acoustic path parameter;
then, determining a deviation signal between the residual noise signal and the secondary path estimation signal;
finally, an updated second noise reduction signal is determined based on the deviation signal and the second noise reduction parameter.
The active noise reduction earphone provided by the foregoing embodiment of the present application can be further obtained by applying the active noise reduction apparatus to an earphone. The earphone comprises:
the reference microphone is arranged on the earphone shell and used for collecting original noise signals outside the ears of the user;
the error microphone is arranged in the earphone shell and close to the sound outlet hole and is used for collecting residual noise signals in the ears of the user;
the feedforward filter corresponds to a first determining module in the active noise reduction device and is used for carrying out noise reduction filtering on the original noise signal according to a first noise reduction parameter and outputting a feedforward noise reduction signal;
the feedback filter corresponds to a second determining module in the active noise reduction device and is used for carrying out noise reduction filtering on the residual noise signal according to a second noise reduction parameter and outputting a feedback noise reduction signal;
and the loudspeaker corresponds to the mixed noise reduction module in the active noise reduction device and is used for responding to the feedforward noise reduction signal and the feedback noise reduction signal and sending noise reduction sound waves.
The active noise reduction earphone has the advantages that noise reduction is carried out on the auditory canal of a user through a mixed framework of feedforward noise reduction and feedback noise reduction, the feedforward filter processes the environmental noise which does not enter the auditory canal in real time, excellent noise reduction width can be guaranteed, and the maximum noise reduction width can reach 3kHz (kilohertz); meanwhile, the feedback filter processes residual noise in the ear in real time, the integral noise reduction depth can be remarkably improved, and the maximum noise reduction depth can reach 35-40 dB. In sum, the overlapped signal of the feedforward noise reduction signal and the feedback noise reduction signal drives the earphone loudspeaker to play noise reduction sound waves, so that the noise reduction width and the noise reduction depth can be achieved, and the active noise reduction effect on the auditory canal of a user is obviously improved.
In another aspect, other embodiments of the present application further provide a computer-readable storage medium, on which computer instructions are stored, and the computer instructions, when executed by a processor, implement the active noise reduction method according to any of the above embodiments. It is understood that the computer storage medium can be any tangible medium, such as: floppy disks, CD-ROMs, DVDs, hard drives, network media, or the like.
In yet another aspect, other embodiments of the present application further provide an electronic device, including: a processor; a memory including computer instructions stored thereon which, when executed by the processor, cause the processor to perform the active noise reduction method as provided in any of the embodiments above.
The above are merely embodiments of the present application, and the description is specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the protection scope of the present application.
Claims (10)
1. An active noise reduction method, comprising:
determining a first noise reduction signal according to an original noise signal acquired by a reference microphone and a first noise reduction parameter;
determining a second noise reduction signal according to the residual noise signal acquired by the error microphone and the second noise reduction parameter;
and driving a loudspeaker based on the first noise reduction signal and the second noise reduction signal, and reducing noise of a target area corresponding to the error microphone.
2. The active noise reduction method of claim 1, wherein determining the second noise reduction signal based on the residual noise signal collected by the error microphone and the second noise reduction parameter comprises:
determining a secondary path estimation signal according to the initial second noise reduction signal and the secondary acoustic path parameters;
determining a bias signal between the residual noise signal and the secondary path estimate signal;
and determining an updated second noise reduction signal according to the deviation signal and the second noise reduction parameter.
3. The active noise reduction method of claim 2, further comprising:
determining updated secondary acoustic path parameters based on the initial second noise reduction signal and the deviation signal;
determining an updated secondary path estimate signal based on the updated second noise reduction signal and the updated secondary acoustic path parameters.
4. The active noise reduction method of claim 3, wherein determining updated secondary acoustic path parameters based on the initial second noise reduction signal and the bias signal comprises:
determining the secondary path estimation signal according to the superposed signal of the signal to be played and the initial second noise reduction signal which are not correlated with the noise signal and the secondary acoustic path parameter;
determining the bias signal based on the residual noise signal and the secondary path estimation signal;
determining the updated secondary acoustic path parameter based on the superposition signal and the deviation signal.
5. The active noise reduction method of claim 2, further comprising: determining the first noise reduction parameter according to the original noise signal and the secondary acoustic path parameter, and the residual noise signal.
6. An active noise reduction device, comprising:
the first determining module is used for determining a first noise reduction signal according to an original noise signal acquired by a reference microphone and a first noise reduction parameter;
the second determining module is used for determining a second noise reduction signal according to the residual noise signal acquired by the error microphone and the second noise reduction parameter;
and the mixed noise reduction module is used for driving a loudspeaker based on the first noise reduction signal and the second noise reduction signal and reducing noise of a target area corresponding to the error microphone.
7. An active noise reduction earphone, comprising:
the reference microphone is used for acquiring an original noise signal outside the ear of the user;
the error microphone is used for collecting residual noise signals in the ears of the user;
the feedforward filter is used for carrying out noise reduction filtering on the original noise signal and outputting a feedforward noise reduction signal;
the feedback filter is used for carrying out noise reduction filtering on the residual noise signal and outputting a feedback noise reduction signal;
and the loudspeaker is used for responding to the feedforward noise reduction signal and the feedback noise reduction signal and sending noise reduction sound waves.
8. The active noise reduction earphone of claim 7 wherein the feedforward filter is an adaptive filter.
9. A computer readable storage medium comprising computer instructions stored thereon, which when executed by a processor, cause the processor to perform the active noise reduction method of any of claims 1-5.
10. An electronic device, comprising:
a processor;
a memory including computer instructions stored thereon that, when executed by the processor, cause the processor to perform the active noise reduction method of any of claims 1-5.
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| CN115278438A (en) * | 2022-07-27 | 2022-11-01 | 北京爱德发科技有限公司 | Noise reduction earphone, noise reduction method and device, storage medium and processor |
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| 李楠;安峰岩;杨飞然;杨军;: "一种用于主动降噪耳机的权重滤波误差信号滤波-x最小均方算法", 应用声学, no. 03, pages 89 - 97 * |
| 袁军;张涛;刘东旭;吕韦喜;: "基于空调噪声的反馈型主动噪声控制系统的设计", 重庆理工大学学报(自然科学), no. 03, pages 29 - 34 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113920975A (en) * | 2021-11-26 | 2022-01-11 | 歌尔科技有限公司 | Noise reduction parameter setting method and device, earphone equipment and storage medium |
| WO2023092754A1 (en) * | 2021-11-26 | 2023-06-01 | 歌尔科技有限公司 | Noise reduction parameter setting method and apparatus, earphone device, and storage medium |
| CN115278438A (en) * | 2022-07-27 | 2022-11-01 | 北京爱德发科技有限公司 | Noise reduction earphone, noise reduction method and device, storage medium and processor |
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