CN113596661A - Earphone, feedback noise reduction method and device - Google Patents
Earphone, feedback noise reduction method and device Download PDFInfo
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- CN113596661A CN113596661A CN202110860522.9A CN202110860522A CN113596661A CN 113596661 A CN113596661 A CN 113596661A CN 202110860522 A CN202110860522 A CN 202110860522A CN 113596661 A CN113596661 A CN 113596661A
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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
- 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
- G10K11/1781—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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
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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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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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
Abstract
The application discloses an earphone, a feedback noise reduction method and a feedback noise reduction device, and belongs to the technical field of sound processing. The earphone includes: the device comprises a microphone module, a loudspeaker module, a signal processing module and a noise reduction module, wherein the signal processing module is respectively connected with the microphone module and the noise reduction module, and the noise reduction module is connected with the loudspeaker module; the noise reduction module obtains a reverse noise signal according to the noise signal and inputs the reverse noise signal to the loudspeaker module.
Description
Technical Field
The application belongs to the technical field of sound processing, and particularly relates to an earphone, a feedback noise reduction method and a feedback noise reduction device.
Background
The noise reduction earphone can reduce the influence of external environment sound on a user, and in the prior art, the earphone comprises an active noise reduction earphone, a passive noise reduction earphone and an active noise reduction hybrid passive noise reduction earphone. The active noise reduction earphone comprises a feedforward noise reduction mode and a feedback noise reduction mode.
When a user wears the earphone to listen to music or make a call, the sound in the auditory canal is divided into two parts: one is external noise, the other is signal sound of music or conversation, and the active noise reduction earphone aims at reducing noise and keeping signal sound as far as possible.
The current feedback noise reduction mode of the active noise reduction earphone is as follows: the feedback microphone collects the audio signals in the auditory canal for phase inversion processing, and an equivalent phase-inverted reverse sound wave signal is generated and played by the earphone so as to offset the audio signals in the auditory canal. However, since the signal tones included in the audio signal are also simultaneously canceled, the wearer of the headset cannot hear the music or the sound of the other party of the call clearly.
Disclosure of Invention
The embodiment of the application aims to provide an earphone which can solve the problem that signal tones contained in an audio signal can be eliminated simultaneously when the existing noise reduction processing is carried out on the audio signal.
In a first aspect, an embodiment of the present application provides an earphone, which includes a microphone module, a speaker module, a signal processing module, and a noise reduction module, where the signal processing module is connected to the microphone module and the noise reduction module, respectively, and the noise reduction module is connected to the speaker module,
the microphone module transmits the acquired audio signals in the auditory canal to the signal processing module, the signal processing module acquires original electric signals corresponding to signal sound signals and obtains noise signals according to the original electric signals corresponding to the signal sound signals and the received audio signals, and the signal processing module transmits the noise signals to the noise reduction module;
the noise reduction module obtains a reverse noise signal according to the noise signal and inputs the reverse noise signal to the loudspeaker module.
In a second aspect, an embodiment of the present application provides a feedback noise reduction method, which is applied to a headphone, where the headphone includes a speaker module and a microphone module, and the method includes:
acquiring an audio signal in an ear canal by the microphone module when the earphone is worn; the audio signal comprises a noise signal and a signal sound signal played by the loudspeaker module;
acquiring an original electric signal corresponding to the signal sound signal played by the loudspeaker module;
obtaining the noise signal according to the original electric signal and the audio signal;
and obtaining an inverse noise reduction signal according to the noise signal, and inputting the inverse noise reduction signal into the loudspeaker module.
In a third aspect, an embodiment of the present application provides a feedback noise reduction apparatus, which is applied to an earphone, where the earphone includes a speaker module and a microphone module, and the apparatus includes:
the first acquisition module is used for acquiring an audio signal in an ear canal through the microphone module under the condition of wearing the earphone; the audio signal comprises a noise signal and a signal sound signal played by the loudspeaker module;
the second acquisition module is used for acquiring an original electric signal corresponding to the signal sound signal played by the loudspeaker module;
the processing module is used for obtaining the noise signal according to the original electric signal and the audio signal;
and the noise reduction module is used for obtaining an inverse noise reduction signal according to the noise signal and inputting the inverse noise reduction signal into the loudspeaker module.
In a fourth aspect, embodiments of the present application provide a headset, the electronic device comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method according to the first aspect.
In a fifth aspect, the present embodiments provide a readable storage medium, on which a program or instructions are stored, which when executed by a processor implement the steps of the method according to the first aspect.
In a sixth aspect, an embodiment of the present application provides a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a program or instructions to implement the method according to the first aspect.
In an embodiment of the present application, the earphone includes a microphone module, a speaker module, a signal processing module, and a noise reduction module, where the signal processing module can simultaneously obtain an audio signal in an ear canal and an original electrical signal corresponding to a signal tone signal, and obtain a noise signal according to the original electrical signal corresponding to the signal tone signal and the received audio signal, and transmit the noise signal to the noise reduction module, and the noise reduction module obtains a reverse noise signal according to the noise signal, and inputs the reverse noise signal to the speaker module. Namely, the noise reduction module only reduces the noise of the noise signal and does not attenuate the signal, so that a user wearing the earphone can hear the sound of music or the other party in a call more clearly.
Drawings
Fig. 1 is a first schematic structural diagram of an earphone according to an embodiment of the present application;
fig. 2a is a schematic structural diagram of a headset according to an embodiment of the present application;
fig. 2b is a schematic structural diagram of a headset according to an embodiment of the present application;
FIG. 3 is a flow chart of a feedback noise reduction method provided by an embodiment of the present application;
fig. 4 is a schematic structural diagram of a feedback noise reduction device provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a fourth earphone according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. 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.
The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of such features. Further, "and/or" in the specification and claims means at least one of the connected objects.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, e.g. as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment of the present application provides a headset 10, and the headset 10 may be an active noise reduction headset.
As shown in fig. 1, the headset 10 includes a microphone module 110, a speaker module 120, a signal processing module 130, and a noise reduction module 140. The signal processing module 130 is connected to the microphone module 110 and the noise reduction module 140, respectively, and the noise reduction module 140 is connected to the speaker module 120.
The microphone module 110 transmits the acquired audio signal in the ear canal to the signal processing module 130, the signal processing module 130 acquires an original electrical signal corresponding to the signal sound signal and obtains a noise signal according to the original electrical signal corresponding to the signal sound signal and the received audio signal, and the signal processing module 130 transmits the noise signal to the noise reduction module 140. The noise reduction module 140 obtains an inverse noise signal according to the noise signal, and inputs the inverse noise signal to the speaker module 120.
In this embodiment, as shown in fig. 2a, the speaker module 120 is generally a loudspeaker, and the speaker module 120 is used for playing a signal sound signal. The tone signal played by the speaker module 120 may include a music signal played by the earphone 10 or a voice signal of a call counterpart.
In this embodiment, the microphone module 110 is used to collect audio signals in the ear canal. The audio signal includes a noise signal and a tone signal played by the speaker module 120. The noise signal may include a noise signal introduced from a transmission medium, a noise signal generated by a hardware factor of the headset 10 itself, and the like. It can be understood that, if the microphone module 110 directly transmits the received audio signal to the noise reduction module 140, the noise reduction module 140 directly performs noise reduction processing on the audio signal, and at this time, not only the noise signal but also the signal sound signal are eliminated, so that the earphone wearer cannot hear the music or the sound of the other party, which affects the user experience.
The microphone module 110 is a feedback microphone, and here, an audio signal within the ear canal may be collected by the feedback microphone. In particular, the audio signal within the ear canal is automatically collected by the feedback microphone while the earphone 10 is in the noise reduction mode.
As shown in fig. 2a, the signal processing module 130 is configured to receive the audio signal collected by the microphone module 110 in the ear canal, and the signal processing module 130 is further configured to receive a raw electrical signal corresponding to the signal. That is to say, in this embodiment, the noise reduction module 140 of the earphone 10 does not directly perform noise reduction on the audio signal, but before the noise reduction module 140 performs noise reduction, the signal processing module 130 compares the audio signal with the original electrical signal corresponding to the signal tone to remove the signal tone, only the noise signal is retained, and then only the noise signal is input to the noise reduction module 140 to perform noise reduction, so that the signal tone is not attenuated to some extent.
In a specific example, the audio signal S is picked up by a feedback microphonetotalComprising a signal tone signal SaAnd noise signal NaI.e. Stotal＝Sa+ Na. Signal signal SaCorresponding original electrical signal SeObtaining a signal S after passing through a transfer function GaI.e. Sa＝Se+ G. By the formula Stotal＝Sa+NaAnd formula Sa＝Se+ G may result in, Na＝Stotal–Se-G. That is, the signal processing module 130 passes through Na＝Stotal–Se-after G processing, from the audio signal StotalMiddle filtering signal SaKeeping only the noise signal NaPassed to the noise reduction module 140 for noise reduction processing. Thereby, fallThe noise module 140 only attenuates the noise signal without any damage to the signal.
In this embodiment, the noise reduction module 140 is configured to obtain an inverse noise signal according to the noise signal, and input the inverse noise signal to the speaker module 120.
Specifically, the noise reduction module 140 may perform phase inversion processing on the noise signal to generate a noise reduction signal having the same magnitude as the noise signal and an opposite phase, where the noise reduction signal is a reverse noise signal, and input the reverse noise signal to the speaker module 120, that is, the reverse noise signal cancels the noise signal to achieve an active noise reduction effect.
According to the earphone of this embodiment, this earphone relates to microphone module, speaker module, signal processing module and falls the module of making an uproar, and signal processing module can obtain the audio signal in the duct and the corresponding original signal of signal tone signal simultaneously to obtain the noise signal transmission according to the corresponding original signal of this signal tone signal and this received audio signal and fall the module of making an uproar, fall the module of making an uproar and obtain reverse noise signal according to the noise signal, and input reverse noise signal to speaker module. Namely, the noise reduction module only reduces the noise of the noise signal and does not attenuate the signal, so that a user wearing the earphone can hear the sound of music or the other party in a call more clearly.
In one embodiment, as shown in fig. 2b, the headset 10 further includes an Equalizer (EQ) module 150. The compensation module 150 is connected to the speaker module 110, and the compensation module 110 is further connected to the signal processing module 130.
The compensation module 150 is configured to compensate the original electrical signal corresponding to the tone signal, so as to improve the tone quality of the tone signal played by the speaker module 120.
In this embodiment, the compensation module 150 is configured to transmit the original electrical signal corresponding to the compensated signal-sound signal to the signal processing module 130, and the signal processing module 130 obtains a noise signal according to the original electrical signal corresponding to the compensated signal-sound signal and the received audio signal.
Specifically, the compensation module 150 transmits the original electrical signal corresponding to the compensated signal to the signal processing module 130. The signal processing module 130 obtains a signal tone signal according to the original electrical signal corresponding to the compensated signal tone signal and the transfer function of the earphone, and filters the signal tone signal from the audio signal to obtain a noise signal, so as to transmit the noise signal to the noise reduction module 140. The noise reduction module 140 obtains an inverse noise signal according to the noise signal, and inputs the inverse noise signal to the speaker module 120.
According to the embodiment, the compensation module can compensate the original electric signal corresponding to the signal sound signal, so that the sound quality of the signal sound signal can be improved, and the user experience is further improved.
In one embodiment, headphone 10 further includes a mode switching module (not shown), which may be implemented by providing a button, a sliding key, or the like on headphone 10, and by which headphone 10 may be switched between the EQ mode and the noise reduction mode.
In one example, as shown in fig. 2b, when the headphone is in the EQ mode, the compensation module 150 transmits the original electrical signal corresponding to the compensated tone signal to the speaker module 120, and at this time, the tone signal played by the speaker module 120 is the target tone quality signal. That is, when the headphone is in the EQ mode, the microphone module 110, the signal processing module 130, and the noise reduction module 140 are not operated.
In one example, as shown in fig. 2b, when the headset is in EQ mode, the headset wearer may operate a button, a slider key, etc. provided in headset 10 to switch headset 10 from EQ mode to noise reduction mode. In case the earphone 10 enters the noise reduction mode, the feedback microphone is automatically turned on to collect the audio signal in the ear canal, and the feedback microphone transmits the collected audio signal to the signal processing module 130. The compensation module 150 transmits the original electrical signal corresponding to the compensated signal to the signal processing module 130. The signal processing module 130 may obtain a noise signal according to the original electrical signal corresponding to the compensated signal sound signal and the received audio signal, and transmit the noise signal to the noise reduction module 140. The noise reduction module 140 obtains an inverse noise signal according to the noise signal, and inputs the inverse noise signal to the speaker module 120.
According to the embodiment, the earphone can be switched between the EQ mode and the noise reduction mode to meet the requirements of different users.
Please refer to fig. 3, which is a flowchart illustrating a method for feedback noise reduction according to an embodiment of the present application. The method may be applied to a headset, which may be the headset shown in fig. 1, 2a and 2b, which may be an active noise reduction headset. The headset includes at least a microphone module 110 and a speaker module 120. As shown in fig. 3, the feedback noise reduction method may include steps S3100 to S3400, which will be described in detail below.
Step S3100, acquiring an audio signal in an ear canal by the microphone module while wearing the earphone.
The audio signal may include a noise signal and a tone signal played by the speaker module. The signal sound signal played by the speaker module may include a music signal played by the earphone or a sound signal of the other party of the call. The noise signal may include a noise signal introduced from a transmission medium, a noise signal generated by a hardware factor of the headset itself, and the like.
The microphone module is a feedback microphone, and particularly, in the case of wearing the earphone, the feedback microphone picks up an audio signal in the ear canal.
When the earphone is worn, after the audio signal in the ear canal is acquired by the microphone module, the following steps are entered:
step S3200, obtaining an original electrical signal corresponding to the signal tone signal played by the speaker module.
The original electrical signal corresponding to the tone signal played by the speaker module is usually an analog signal.
In this embodiment, it is not direct to the audio signal fall the noise processing, but before falling the noise processing, can acquire the corresponding original signal of telecommunication of signal tone signal to carry out the contrast with the audio signal and the corresponding original signal of telecommunication of signal tone signal and get rid of the signal tone signal, remain the noise signal, and then only fall the noise processing to the noise signal, make can not have some attenuations to the signal tone signal.
After obtaining the original electric signal corresponding to the signal sound signal played by the speaker module, entering:
in step 3300, a noise signal is obtained from the original electrical signal and the audio signal.
In this embodiment, the step S3300 of obtaining the noise signal according to the original electrical signal and the audio signal may further include the following steps 3310 to S3330:
step S3310, a pre-stored transfer function of the headphone is acquired.
The transfer function G of the headset is a function that converts the original electrical signal into a tone signal. Each earpiece has a corresponding transfer function G. Typically, when each earphone leaves the factory, a tester tests the transfer function G of the earphone. Specifically, the loudspeaker of the earphone can be used for sounding and feeding back a microphone to collect a signal of the loudspeaker of the earphone so as to test the transfer function of the earphone, and after the test is completed, the transfer function G of the earphone is stored in the earphone.
It can be understood that after each earphone leaves the factory, the earphone wearer can also collect the signal of the earphone loudspeaker through the earphone loudspeaker sounding and the feedback microphone, calibrate in real time and save the transfer function in the earphone.
Step S3320, obtaining a signal tone signal according to the original electrical signal and the transfer function of the earphone.
In step S3320, the tone signal S is generatedaCorresponding original electrical signal SeObtaining a signal S after passing through a transfer function GaThen signal Sa＝Se+G。
Step S3330, a noise signal is obtained according to the signal sound signal and the audio signal.
The step S3330 of obtaining the noise signal according to the signal sound signal and the audio signal may further include: the signal is removed from the audio signal to obtain a noise signal.
Due to the audio signal S picked up by the feedback microphonetotalComprising a signal tone signal SaAnd a noise signal NaI.e. Stotal＝Sa+Na. Original electric signal S corresponding to signal sound signaleObtaining a signal S after passing through a transfer function GaI.e. Sa＝Se+ G. By the formula Stotal＝Sa+NaAnd formula Sa＝Se+ G may result in: n is a radical ofa＝Stotal–Se-G. I.e. by Na＝Stotal–SeG is processed to obtain the audio signal StotalRemoving the signal SaObtaining a noise signal NaFor noise signals N onlyaAnd carrying out noise reduction treatment.
After obtaining the noise signal according to the original electric signal and the audio signal, entering:
and step S3400, obtaining an inverse noise reduction signal according to the noise signal, and inputting the inverse noise reduction signal into the loudspeaker module.
The inverted noise reduction signal is a signal having the same magnitude as the noise signal and an opposite phase.
In this embodiment, the noise signal may be processed in an inverted manner to generate a noise reduction signal having the same magnitude as the noise signal and an opposite phase, where the noise reduction signal is an inverted noise signal, and the inverted noise signal is input to the speaker module 120, so that the noise signal can be cancelled by the inverted noise signal to achieve an active noise reduction effect.
According to the method of the embodiment, the acquired audio signal and the original electric signal corresponding to the signal sound signal can be compared to remove the voice signal, only the noise signal is reserved and subjected to noise reduction processing, the signal sound signal is not attenuated, and therefore a user wearing the earphone can hear music or the sound of the other party in a call more clearly.
In one embodiment, in the present embodiment, before the step S3100 is executed to acquire the audio signal in the ear canal through the microphone module while wearing the earphone, the feedback noise reduction method may further include the following steps S4100 to S4200:
in step S4100, a first input is received.
In one example, the headset is in EQ mode by default, and when the headset wearer operates a button, a slide key, or the like provided in the headset, the headset may be switched from EQ mode to noise reduction mode.
In one example, the headphone is in the noise reduction mode in a default state, and when the headphone is currently in the EQ mode, the headphone wearer can operate a button, a slide key, or the like provided in the headphone to switch the headphone from the EQ mode to the noise reduction mode.
In step S4200, the headset is controlled to enter a noise reduction mode in response to the first input.
In step S4200, when the headset is currently in the EQ mode, the headset wearer may operate a button, a sliding key, and the like provided in the headset to switch the headset from the EQ mode to the noise reduction mode. In case the earpiece enters the noise reduction mode, the feedback microphone is automatically turned on to pick up the audio signal inside the ear canal.
It should be noted that, in the feedback noise reduction method provided in the embodiment of the present application, the execution main body may be a feedback noise reduction apparatus, or may be a module in the feedback noise reduction apparatus for executing the presentation control of loading the feedback noise reduction method. In the embodiment of the present application, a feedback noise reduction device is taken as an example to execute a loading feedback noise reduction method, and the feedback noise reduction method provided in the embodiment of the present application is described.
The embodiment of the present application provides a feedback noise reduction apparatus 400, which is applied to a headset, where the headset may be the headset shown in fig. 1, fig. 2a and fig. 2b, and the headset includes at least a speaker module and a microphone module.
As shown in fig. 4, the apparatus 400 includes:
a first obtaining module 410, configured to obtain, through the microphone module, an audio signal in an ear canal when the earphone is worn; the audio signal comprises a noise signal and a signal sound signal played by the loudspeaker module.
The second obtaining module 420 is configured to obtain an original electrical signal corresponding to the signal sound signal played by the speaker module.
A processing module 430, configured to obtain the noise signal according to the original electrical signal and the audio signal.
And the noise reduction module 440 is configured to obtain an inverse noise reduction signal according to the noise signal, and input the inverse noise reduction signal to the speaker module.
In an embodiment, the processing module 430 is specifically configured to: obtaining a pre-stored transfer function of the earphone; obtaining the signal sound signal according to the original electric signal and the transfer function of the earphone; and obtaining the noise signal according to the signal sound signal and the audio signal.
In an embodiment, the denoising module 440 is specifically configured to: and removing the signal sound signal from the audio signal to obtain the noise signal.
The feedback noise reduction device in the embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a wireless headset.
The feedback noise reduction device provided in the embodiment of the present application can implement each process implemented by the feedback noise reduction method in the method embodiment of fig. 3, and is not described here again to avoid repetition.
In the embodiment of the application, the original electric signals corresponding to the acquired audio signals and the signal signals can be compared to remove the voice signals, only the noise signals are reserved, noise reduction processing is carried out on the noise signals, the signal signals cannot be attenuated to some extent, and therefore a user wearing the earphone can hear music or the sound of the other party in a call more clearly.
Optionally, an earphone 500 is further provided in this embodiment of the present application, as shown in fig. 5, and includes a processor 510, a memory 520, and a program or an instruction stored on the memory 520 and capable of being executed on the processor 510, where the program or the instruction is executed by the processor 510 to implement each process of the above embodiment of the feedback noise reduction method, and can achieve the same technical effect, and no further description is provided here to avoid repetition.
The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the process of the feedback noise reduction method embodiment is implemented, and the same technical effect can be achieved, and in order to avoid repetition, details are not repeated here.
Wherein, the processor is the processor in the earphone described in the above embodiments. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.
The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or an instruction to implement each process of the above embodiment of the feedback noise reduction method, and can achieve the same technical effect, and the details are not repeated here to avoid repetition.
It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-on-chip, system-on-chip or system-on-chip, etc.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (11)
1. An earphone comprises a microphone module, a loudspeaker module, a signal processing module and a noise reduction module, wherein the signal processing module is respectively connected with the microphone module and the noise reduction module, the noise reduction module is connected with the loudspeaker module,
the microphone module transmits the acquired audio signals in the auditory canal to the signal processing module, the signal processing module acquires original electric signals corresponding to signal sound signals and obtains noise signals according to the original electric signals corresponding to the signal sound signals and the received audio signals, and the signal processing module transmits the noise signals to the noise reduction module;
the noise reduction module obtains a reverse noise signal according to the noise signal and inputs the reverse noise signal to the loudspeaker module.
2. The headset of claim 1, further comprising a compensation module, the compensation module being coupled to the speaker module, the compensation module being further coupled to the signal processing module;
the compensation module transmits the original electric signal corresponding to the compensated signal sound signal to the signal processing module, and the signal processing module obtains a noise signal according to the original electric signal corresponding to the compensated signal sound signal and the received audio signal.
3. The headset of claim 1, wherein the microphone module is a feedback microphone.
4. A feedback noise reduction method is applied to earphones which comprise a loudspeaker module and a microphone module, and is characterized by comprising the following steps:
acquiring an audio signal in an ear canal by the microphone module when the earphone is worn; the audio signal comprises a noise signal and a signal sound signal played by the loudspeaker module;
acquiring an original electric signal corresponding to the signal sound signal played by the loudspeaker module;
obtaining the noise signal according to the original electric signal and the audio signal;
and obtaining an inverse noise reduction signal according to the noise signal, and inputting the inverse noise reduction signal into the loudspeaker module.
5. The method of claim 4, wherein deriving the noise signal from the original electrical signal and the audio signal comprises:
obtaining a pre-stored transfer function of the earphone;
obtaining the signal sound signal according to the original electric signal and the transfer function of the earphone;
and obtaining the noise signal according to the signal sound signal and the audio signal.
6. The method of claim 5, wherein deriving the noise signal from the tone signal and the audio signal comprises:
and removing the signal sound signal from the audio signal to obtain the noise signal.
7. A feedback noise reduction device applied to a headset, the headset comprises a speaker module and a microphone module, and is characterized by comprising:
the first acquisition module is used for acquiring an audio signal in an ear canal through the microphone module under the condition of wearing the earphone; the audio signal comprises a noise signal and a signal sound signal played by the loudspeaker module;
the second acquisition module is used for acquiring an original electric signal corresponding to the signal sound signal played by the loudspeaker module;
the processing module is used for obtaining the noise signal according to the original electric signal and the audio signal;
and the noise reduction module is used for obtaining an inverse noise reduction signal according to the noise signal and inputting the inverse noise reduction signal into the loudspeaker module.
8. The apparatus of claim 7, wherein the processing module is specifically configured to:
obtaining a pre-stored transfer function of the earphone;
obtaining the tone signal from the original electrical signal and a transfer function of the headset,
and obtaining the noise signal according to the signal sound signal and the audio signal.
9. The apparatus of claim 8, wherein the noise reduction module is specifically configured to:
and removing the signal sound signal from the audio signal to obtain the noise signal.
10. A headset comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, which program or instructions, when executed by the processor, carry out the steps of the feedback noise reduction method according to any of claims 4-6.
11. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, carry out the steps of the feedback noise reduction method according to any of claims 4-6.
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| CN202110860522.9A CN113596661A (en) | 2021-07-28 | 2021-07-28 | Earphone, feedback noise reduction method and device |
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