WO2022227992A1 - 音频播放方法和音频播放设备 - Google Patents

音频播放方法和音频播放设备 Download PDF

Info

Publication number
WO2022227992A1
WO2022227992A1 PCT/CN2022/083707 CN2022083707W WO2022227992A1 WO 2022227992 A1 WO2022227992 A1 WO 2022227992A1 CN 2022083707 W CN2022083707 W CN 2022083707W WO 2022227992 A1 WO2022227992 A1 WO 2022227992A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
speaker
noise
audio
frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/083707
Other languages
English (en)
French (fr)
Inventor
王泽�
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
Original Assignee
Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Publication of WO2022227992A1 publication Critical patent/WO2022227992A1/zh
Priority to US18/496,836 priority Critical patent/US12614538B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2410/00—Microphones
    • H04R2410/05—Noise reduction with a separate noise microphone

Definitions

  • the present application relates to the technical field of noise reduction, and more particularly, to an audio playback method and audio playback device.
  • ANC Active Noise Cancellation
  • the present application provides an audio playback method and audio playback device that can improve the noise floor and increase the noise while ensuring the high quality of the audio signal.
  • a method for playing audio comprising:
  • the low frequency part of the noise-cancelled signal is played through the first speaker.
  • An audio playback device includes: a collection circuit, a noise reduction circuit, and a low-frequency output circuit, the low-frequency output circuit includes a first speaker, wherein,
  • the acquisition circuit is used for acquiring noise signals
  • the noise reduction circuit is used to perform noise reduction processing on the noise signal to obtain a noise reduction signal
  • the low-frequency output circuit is used for playing the low-frequency part of the noise canceling signal through the first speaker.
  • the present application discloses an audio playback method and an audio playback device.
  • a noise cancellation signal is obtained, and the low frequency in the noise cancellation signal obtained through the first speaker is played.
  • the low-frequency part of the played noise-cancelling signal can cancel the low-frequency part of the noise signal, and the first speaker will not play the high-frequency part of the noise-cancelling signal.
  • the audio playing method of the embodiment of the present application because the first speaker plays the low-frequency part of the noise-cancelling signal, the high-frequency signal in the non-noise-reducing frequency band will not be played back, especially in the case of When the ANC function is turned on and no audio is played, the high-frequency noise caused by the replay of the high-frequency part of the noise-cancelling signal is avoided, and the noise floor of the audio playback device is further reduced.
  • FIG. 1 is a schematic diagram of an application environment of an audio playback method in one embodiment
  • FIG. 2 is a schematic flowchart of an audio playback method in one embodiment
  • FIG. 3 is a schematic flowchart of an audio playback method in one embodiment
  • FIG. 4 is a schematic diagram of an audio playback device in one embodiment
  • FIG. 5 is a schematic diagram of an audio playback device in one embodiment
  • FIG. 6 is a schematic diagram of an audio playback device in one embodiment
  • FIG. 7 is a schematic diagram of an audio playback device in one embodiment
  • FIG. 8 is a schematic diagram of an audio playback device in one embodiment
  • FIG. 9 is a structural block diagram of an audio playback device in one embodiment
  • a first active noise reduction filter 30 a first dynamic compressor 40;
  • Second Active Noise Cancellation Filter 50; Second Dynamic Compressor: 60;
  • the audio playback method provided by the present application can be applied in the application environment shown in FIG. 1 , wherein the earphone receives the audio signal sent by the external audio device or obtains the audio signal stored in the earphone, and uses the speaker close to the ear to convert it into The audio signal that the user can hear.
  • the feed-forward earphone may include a first sound-receiving microphone as shown in FIG. 1
  • the feedback earphone may include a second sound-receiving microphone close to the ear canal as shown in FIG. 1
  • the hybrid earphone may It includes a first sound-receiving microphone and a second sound-receiving microphone as shown in FIG. 1 .
  • the active noise reduction method in the traditional technology mainly generates anti-phase sound waves corresponding to the external noise through the noise reduction module installed inside the headphones, so as to reduce the noise from the outside world. Noise neutralization to obtain a denoised audio signal.
  • the traditional active noise reduction method can withstand a certain phase delay due to the long wavelength of the low-frequency part of the noise signal, while the high-frequency part of the noise signal has a short wavelength and is sensitive to phase deviation.
  • the noise cancellation signal of the cross talk wave neutralizes the external noise. This noise reduction method has no obvious effect on the noise reduction of the high frequency part of the noise signal.
  • the traditional active noise reduction method uses a full-band speaker to play Noise-cancelling signal, so that the high-frequency part of the noise-cancelling signal is replayed, and high-frequency playback causes the noise floor of the headset to increase, especially when the active noise reduction function of the headset is turned on and the audio signal is not played, the noise floor of the headset It is more obvious than when the active noise cancellation function is not turned on. Therefore, it is necessary to provide an audio playback method and audio playback device that can ensure high-quality audio signals while improving the problem of noise floor and noise enhancement.
  • an audio playback method is provided, and the method is applied to the earphone in FIG. 1 as an example to illustrate, including the following steps:
  • the noise signal when the audio playback device is working will affect the sound quality experience of the played audio signal.
  • the noise signal may include the external environment.
  • the noise signal may also include residual noise signal coupled into the ear canal, etc. Therefore, it is necessary to perform noise reduction processing on these noise signals to improve the sound quality of the audio signal played by the audio playback device.
  • the noise signal acquired by the audio playback device is an external environment noise signal
  • the above-mentioned noise signal may be acquired by a feedforward acquisition unit outside the audio playback device.
  • the external environment noise signal can be acquired by a feedforward acquisition unit outside the audio playback device, and the audio playback device can acquire the external environment noise signal.
  • the feedback acquisition unit inside the device acquires the residual noise signal in the audio playback device.
  • the audio playback device performs noise reduction processing on the acquired noise signal to obtain a noise reduction signal.
  • the acquired noise signal is an environmental noise signal
  • the audio playback device performs noise reduction processing on the acquired environmental noise signal to obtain a de-noised signal
  • the audio noise signal includes an environmental noise signal and a residual noise signal
  • the audio The playback device needs to perform noise reduction processing on the acquired environmental noise signal and residual noise signal to obtain a noise reduction signal.
  • the noise reduction processing performed by the audio playback device on the acquired noise signal may be to generate the same but completely opposite sound wave as the noise signal to obtain the noise reduction signal, or the audio playback device may perform an inversion of the noise signal. processing to obtain a de-noised signal.
  • the amplitude of the inverted signal is further subjected to compression processing, etc., which is not limited in this embodiment of the present application.
  • a signal with a signal frequency less than 1KHz is called a low-frequency signal.
  • the signal with a signal frequency less than 1KHz is called a low-frequency signal, which is to illustrate the low-frequency part in this embodiment.
  • the low-frequency part of the noise-cancelling signal played by the first speaker may be the signal whose frequency is less than 1 KHz in the above-mentioned noise-cancelling signal.
  • the first speaker may be a woofer, and the low-frequency part of the noise-cancelling signal can be played through the woofer, and the device characteristics of the first speaker can be set to make the first speaker play the low-frequency part of the noise-cancelling signal.
  • a filter may also be set inside the first speaker, and the low-frequency part is obtained by filtering the noise-cancelling signal through the built-in filter, and the low-frequency part passes through the first speaker.
  • the first speaker may be any one of an electrodynamic speaker, an electrostatic speaker, an electromagnetic speaker, and a piezoelectric speaker.
  • a noise reduction signal is obtained by performing noise reduction processing on the acquired noise signal, and the low frequency part in the obtained noise reduction signal is played through the first speaker, and the low frequency part in the played noise reduction signal can reduce the noise.
  • the low-frequency part of the signal is canceled, and the first speaker will not play the high-frequency part of the noise-cancelling signal.
  • the audio playback method of the embodiment of the present application Since the first speaker plays the low-frequency part of the noise-cancelling signal, the high-frequency signal in the non-noise-cancelling frequency band will not be reproduced, especially when the ANC function is turned on and no audio is played, avoiding the noise-cancelling signal.
  • the high-frequency noise caused by the playback of the high-frequency part of the audio device further reduces the noise floor of the audio playback device.
  • the low-frequency part of the noise-cancelling signal can be obtained by filtering the noise-cancelling signal first, and then playing the low-frequency part of the noise-cancelling signal through the first speaker.
  • the device characteristics of the first speaker can be used to play the low-frequency part of the noise-cancelling signal.
  • the above S203 includes: filtering the noise-eliminated signal to obtain a low-frequency part of the noise-eliminated signal, and playing the low-frequency part of the noise-eliminated signal through the first speaker.
  • the audio playback device first filters the obtained noise-cancelling signal to obtain the low-frequency part of the noise-cancelling signal, and then plays the low-frequency part of the obtained noise-cancelling signal through the first speaker.
  • a filter may be set before the first speaker, and the obtained denoising signal is filtered by the filter to obtain the low frequency part of the denoising signal, and then the first speaker plays the low frequency part of the denoising signal.
  • the low-frequency part of the noise-cancelling signal obtained by filtering the noise-cancelling signal by the audio playback device may be a signal whose frequency is less than 1 KHz in the noise-cancelling signal.
  • the low-frequency part in the de-noising signal can be obtained by filtering the de-noising signal, so that the low-frequency part in the de-noising signal can be directly played through the first speaker, and the implementation process is relatively simple; What is obtained by filtering is the low-frequency part of the de-noised signal, and the low-frequency part of the de-noised signal is also played through the first speaker, which avoids noise reproduction of the high-frequency signal in the non-noise-reducing frequency band.
  • the above S203 includes: using the device characteristics of the first speaker to play the low frequency part of the noise cancelling signal, and the device characteristics of the first speaker make the first speaker meet preset low frequency output conditions.
  • the audio playback device uses the device characteristics of the first speaker to play the low-frequency part in the noise-cancelling signal, wherein the device characteristics of the first speaker make the first speaker satisfy a preset low-frequency output condition.
  • the above-mentioned low-frequency output condition includes that the frequency band of the output signal of the first speaker is within a preset low-frequency frequency range, and generally, a signal whose signal frequency is less than 1 KHz is called a low-frequency signal.
  • the first speaker when the first speaker plays the low-frequency part of the noise-cancelled signal, it can also play the intermediate-frequency part of the noise-cancelled signal.
  • a signal with a signal frequency between 1KHz-6KHz can be called an intermediate-frequency signal. Therefore, the above-mentioned low-frequency output condition may further include that the output signal of the first speaker has the characteristics of high low-frequency amplitude and gentle mid-frequency amplitude.
  • the above-mentioned low-frequency output condition further includes that the sound pressure change of the output signal of the first speaker is less than a preset threshold, wherein the sound pressure change of the output signal of the first speaker is the atmospheric pressure disturbed by the output signal of the first speaker. subsequent changes.
  • the device characteristics of the first speaker include the acoustic resistance characteristics of the sound hole tuning net of the horn of the first speaker and/or the damping characteristics of the diaphragm material. Taking an earphone as an example, the horn of the first speaker of the earphone can be adjusted by adjusting the horn of the first speaker.
  • the acoustic resistance characteristics of the sound hole tuning net make it meet the above-mentioned low frequency output conditions, so that the first speaker can play a low frequency signal or a low frequency signal; Satisfy the above low-frequency output conditions, so that the first speaker can play a low-frequency signal or a medium-low frequency signal; alternatively, the acoustic resistance characteristics of the horn sound hole tuning net of the first speaker of the earphone and the damping characteristics of the diaphragm material can be adjusted at the same time, To make it meet the above-mentioned low-frequency output conditions, or, other device characteristics of the first speaker of the earphone may also be adjusted, which are not limited in the embodiments of the present application.
  • a signal with a signal frequency of less than 1KHz is called a low-frequency signal
  • a signal with a signal frequency between 1KHz-6KHz is called an intermediate-frequency signal, which is only used to illustrate the low-frequency signal, intermediate-frequency signal, and low-frequency band in the embodiments of the present application.
  • the scope is not intended to limit the embodiments of the present application.
  • the audio playback device uses the device characteristics of the first speaker to play the low-frequency part of the noise-cancelling signal, and the device characteristics of the first speaker can enable the first speaker to meet the preset low-frequency output conditions, thus using the first speaker's device characteristics
  • the device characteristics can play the low-frequency part of the noise-cancelling signal, and there is no need to design other filter components in the audio playback device, which can simplify the circuit cost of the audio playback device; in addition, using the device characteristics of the first speaker to play the noise-cancelling signal
  • the low frequency part avoids the noise reproduction of the high frequency signal in the non-noise reduction frequency band.
  • the acquired noise signal may include an environmental noise signal.
  • the above S202 includes: performing noise reduction processing on the environmental noise signal to obtain a noise cancellation signal .
  • the audio playback device performs noise reduction processing on the acquired environmental noise signal to obtain a noise reduction signal.
  • the noise reduction processing performed by the audio playback device on the acquired noise signal may be to directly generate a sound wave with the same amplitude, frequency and opposite phase as the above-mentioned environmental noise signal to obtain the above-mentioned denoising signal, or it may be to directly generate the above-mentioned environmental noise signal. The signal is inverted to obtain the above-mentioned denoised signal.
  • the audio playback device performs noise reduction processing on the acquired environmental noise signal, and can obtain a noise reduction signal, through which the environmental noise signal can be canceled, thereby improving the noise reduction effect of the audio playback device and ensuring the played audio the sound quality of the signal.
  • the acquired noise signal may include a residual noise signal.
  • the above S202 includes: performing noise reduction processing on the environmental noise signal and the residual noise signal to obtain a noise canceled signal.
  • the audio playback device performs noise reduction processing on the acquired environmental noise signal and residual noise signal to obtain a noise reduction signal.
  • the audio playback device may perform noise reduction processing on the environmental noise signal and the residual noise signal, for example, perform inversion processing on the environmental noise signal to obtain a denoised signal whose phase is opposite to that of the environmental noise signal.
  • the phase inversion process is performed to obtain a de-noised signal whose phase is opposite to that of the residual noise signal.
  • the inverted environmental noise signal and the inverted residual noise signal can be obtained, and the amplitudes of the inverted environmental noise signal and the inverted residual noise signal can be compressed. limit to get the de-noised signal. For example, the amplitude of the inverse environmental noise signal is compressed within a preset first amplitude range, and the amplitude of the residual noise signal is compressed within a preset second amplitude range.
  • the audio playback device performs noise reduction processing on the acquired environmental noise signal and residual noise signal, and can obtain a noise cancellation signal, which can cancel both the external environmental noise signal and the residual noise in the ear canal. noise signal, further reducing the noise floor of the audio playback device.
  • the audio signal in the ear canal is also collected when the residual noise signal is collected.
  • the audio signal in the ear canal will also be collected, then the audio signal in the ear canal also needs to be denoised to ensure the sound quality of the played audio signal.
  • the following steps can be taken to de-noise the audio signal in the ear canal:
  • the audio playback device may invert the collected audio signal in the ear canal to obtain an inverted audio signal.
  • the audio playback device may perform inversion processing on the collected audio signal in the ear canal through an active noise reduction filter to obtain an inversion audio signal, or may generate an audio signal according to the frequency, amplitude change and other characteristics of the audio signal in the ear canal. The above-mentioned inverted audio signal.
  • the above-mentioned inverted audio signal is an audio signal whose phase is opposite to that of the audio signal to be played. Therefore, by superimposing the audio signal to be played and the inverted audio signal, the collected audio signal in the ear canal can be processed. to eliminate.
  • the audio playback device can obtain an inverse audio signal that is opposite to the audio signal in the ear canal by performing inversion processing on the collected audio signal in the ear canal, and then can compare the audio signal to be played with the inverted audio signal. Perform superposition processing to eliminate the collected audio signals in the ear canal, thereby ensuring the sound quality of the played audio signals.
  • the audio playback device needs to play an audio signal. If the audio playback device has an audio signal to be played, the audio playback device can also fuse the to-be-played audio signal and the obtained noise reduction signal to obtain a fusion audio signal.
  • the speaker plays the low frequency part of the fused audio signal.
  • the above method further includes:
  • the audio playback device may first acquire the audio signal to be played.
  • the audio playback device may obtain the audio signal to be played through its own pickup, and the audio signal to be played may also be pre-stored in the memory of the audio playback device, or may be obtained from other external audio devices.
  • the external audio device can be a speaker, a mobile phone, a TV, a computer, a sound card, etc.
  • the audio signal to be played may be a music signal, a voice signal, or other audio signals, etc., which is not limited in this embodiment.
  • the audio playback device after the audio playback device acquires the audio signal to be played, the audio playback device fuses the acquired audio signal to be played and the obtained noise cancelling signal to obtain a fused audio signal.
  • the audio playback device may superimpose the above-obtained audio signal to be played and the above-obtained denoising signal through a preset fusion device to obtain a fusion audio signal.
  • the audio playback device plays the low-frequency part of the fused audio signal through the first speaker.
  • the audio playback device may filter the fused audio signal to obtain a low frequency part in the fused audio signal, and play the low frequency part in the fused audio signal through the first speaker.
  • the audio playback device can also play the low-frequency part of the noise-cancelling signal by using the device characteristics of the first speaker, wherein the device characteristics of the first speaker make the first speaker meet the preset low-frequency output conditions, optionally, the preset The set low-frequency output conditions include that the frequency band of the output signal of the first speaker is within the preset low-frequency frequency range, and the output signal of the first speaker has the characteristics of high low-frequency amplitude and smooth mid-frequency amplitude.
  • the low-frequency output conditions also include: The sound pressure variation of the output signal of the first speaker is less than a preset threshold; optionally, the device characteristics of the first speaker include the acoustic resistance characteristics of the horn sound hole tuning net of the first speaker and/or the damping characteristics of the diaphragm material . It should be noted that, for the detailed introduction of the preset low frequency output condition satisfied by the first speaker and the detailed introduction of the device characteristics of the first speaker, please refer to the description of the above embodiment, which will not be repeated in this embodiment.
  • the audio playback device will acquire the audio signal to be played, fuse the audio signal to be played and the obtained noise cancellation signal to obtain a fused audio signal, and play the fused audio signal through the first speaker.
  • the low-frequency part in the audio signal in this way, the sound quality of the played audio signal is taken into account while noise reduction is performed, and the playback of the high-quality audio signal is ensured.
  • the gain value of the audio signal to be played may also be adjusted.
  • the above method further includes: adjusting the gain of the audio signal to be played.
  • the audio playback device may further adjust the gain of the audio signal to be played.
  • the audio playback device may adjust the gain of the audio signal to be played through an equalizer. It can be understood that, by adjusting the gain of the audio signal to be played, the playing quality of the audio signal to be played can be improved by adjusting the electrical signals of various frequencies.
  • the high frequency part of the audio signal to be played may also be played.
  • the foregoing method further includes: playing a high frequency part of the audio signal to be played through a second speaker.
  • the audio playback device plays the high frequency part of the audio signal to be played through the second speaker.
  • the second speaker may be a tweeter.
  • the second speaker may be any one of an electrodynamic speaker, an electrostatic speaker, an electromagnetic speaker, and a piezoelectric speaker.
  • a signal with a signal frequency between 6KHz-20KHz can be called a high-frequency signal.
  • the high-frequency part of the audio signal to be played is played through the second speaker, which can be the signal in the audio signal to be played. The part whose frequency is between 6KHz-20KHz.
  • calling the signal with a signal frequency between 6KHz-20KHz as a high-frequency signal is to illustrate the signal of the high-frequency part of the audio signal to be played played in this embodiment.
  • the division of frequency signals is not limited to this.
  • the sound pressure of the output signal of the second speaker is higher than the sound pressure of the output signal of the first speaker, that is, the change of atmospheric pressure after being disturbed by the output signal of the second speaker is greater than that of the atmospheric pressure by the output of the first speaker. Changes that occur after a signal perturbation.
  • playing the high frequency part of the audio signal to be played through the second speaker can be played in the following two ways:
  • the audio signal to be played is filtered to obtain the high frequency part of the audio signal to be played, and the high frequency part of the audio signal to be played is played through the second speaker.
  • the audio playback device first filters the to-be-played audio signal to obtain the high-frequency part of the to-be-played audio signal, and then plays the high-frequency part of the to-be-played audio signal through the second speaker.
  • a filter can be set before the second speaker, the audio signal to be played is filtered by the filter to obtain the high frequency part of the audio signal to be played, and then the high frequency part of the audio signal to be played is played by the second speaker.
  • the high frequency part of the audio signal to be played obtained by filtering the audio signal to be played by the audio playback device may be a signal with a frequency of 6KHz-20KHz in the audio signal to be played.
  • the high frequency part of the audio signal to be played is played by using the device characteristics of the second speaker, and the device characteristics of the second speaker make the second speaker satisfy a preset high frequency output condition.
  • the audio playback device uses the device characteristics of the second speaker to play the high frequency part of the audio signal to be played, wherein the device characteristics of the second speaker make the second speaker meet preset high frequency output conditions.
  • the above-mentioned high-frequency output condition includes that the frequency band of the output signal of the second speaker is within a preset high-frequency frequency range, and generally, a signal with a signal frequency between 6KHz-20KHz is called a high-frequency signal.
  • the device characteristics of the second speaker include at least one of the type of the diaphragm material, the Young's modulus of the diaphragm material, the damping characteristics of the diaphragm material, the quality of the speaker vibration system, and the size of the coil of the speaker, and the earphone
  • the type of the diaphragm material of the second speaker of the earphone can be adjusted to meet the above-mentioned high-frequency output conditions, so that the second speaker can play the high-frequency signal in the audio signal to be played
  • the Young's modulus of the diaphragm material of the second speaker makes it meet the above-mentioned high-frequency output conditions, so that the second speaker can play the high-frequency signal in the audio signal to be played
  • the vibration of the second speaker of the earphone can also be adjusted by adjusting The damping characteristics of the membrane material make it meet the above-mentioned high-frequency output conditions, so that the second speaker can play the high-frequency signal in the audio signal to be played
  • a device characteristic is set, so that the second speaker can play the high-frequency signal in the audio signal to be played, or other device characteristics of the second speaker of the earphone can also be adjusted, which are not limited in the embodiments of the present application.
  • the audio playback device plays the high-frequency part of the audio signal to be played through the second speaker, and plays the low-frequency part of the audio signal to be played separately from the high-frequency part of the audio signal to be played, so that the audio playback device plays the to-be-played audio signal.
  • the high-frequency part of the playing audio signal will not have the noise of the high-frequency signal in the non-noise reduction frequency band, thereby ensuring the sound quality of the playing audio signal to be played;
  • the high frequency part ensures the integrity of the audio signal to be played.
  • steps in the flowcharts of FIGS. 2-3 are shown in sequence according to the arrows, these steps are not necessarily executed in the sequence shown by the arrows. Unless explicitly stated herein, the execution of these steps is not strictly limited to the order, and these steps may be performed in other orders. Moreover, at least a part of the steps in FIGS. 2-3 may include multiple steps or multiple stages. These steps or stages are not necessarily executed and completed at the same time, but may be executed at different times. The execution of these steps or stages The order is also not necessarily sequential, but may be performed alternately or alternately with other steps or at least a portion of the steps or phases within the other steps.
  • an audio playback device including a collection circuit, a noise reduction circuit and a low frequency output circuit
  • the low frequency output circuit includes a first speaker, wherein the collection circuit is used to collect noise signals
  • the noise reduction circuit is used to perform noise reduction processing on the noise signal to obtain the noise reduction signal; the low frequency output circuit is used to play the low frequency part of the noise reduction signal through the first speaker.
  • the above audio playback device may be an earphone.
  • the noise signal may include an external environmental noise signal, or Including residual noise signals coupled into the ear canal, etc., therefore, it is necessary to perform noise reduction processing on these noise signals to improve the sound quality of the audio signal played by the audio playback device.
  • the noise signal collected by the acquisition circuit of the audio playback device may be an external environment noise signal, a residual noise signal in the audio playback device, or an external environment noise signal and an audio playback device. residual noise in the signal.
  • the noise signal collected by the collection circuit is an external environment noise signal
  • the noise reduction circuit performs noise reduction processing on the collected external environment noise signal to obtain a noise reduction signal
  • the noise signal collected by the collection circuit includes an external environment noise signal and the residual noise signal
  • the noise reduction circuit needs to perform noise reduction processing on the acquired external environment noise signal and the residual noise signal to obtain a denoised signal.
  • the noise reduction process performed by the noise reduction circuit on the acquired noise signal may be to generate the same sound wave as the noise signal but completely opposite to obtain the noise reduction signal.
  • the noise reduction circuit may perform inversion processing on the noise signal to obtain a noise reduction signal.
  • the noise reduction circuit may further perform compression processing on the amplitude of the inverted signal after generating the corresponding inverted signal according to the noise signal, which is not limited in this embodiment of the present application.
  • a signal with a signal frequency less than 1KHz is called a low-frequency signal.
  • the signal with a signal frequency less than 1KHz is called a low-frequency signal, which is to illustrate the low-frequency part in this embodiment.
  • the low-frequency part of the noise-cancelling signal played by the low-frequency output circuit through the first speaker may be a signal with a frequency less than 1 KHz in the above-mentioned noise-cancelling signal.
  • the noise signal is collected by the collection circuit, and the noise reduction circuit performs noise reduction processing on the collected noise signal to obtain the noise reduction signal, and then the low frequency part of the noise reduction signal can be played through the first speaker of the low frequency output circuit,
  • the low-frequency part of the played noise-cancelling signal can cancel the low-frequency part of the noise signal, and the low-frequency output circuit will not play the high-frequency part of the noise-cancelling signal. Since the low-frequency output circuit plays the low-frequency part of the noise-cancelling signal, the audio playback method of the embodiment of the present application will not reproduce the high-frequency signal in the non-noise-reducing frequency band, especially when the ANC is turned on. When the function is enabled and the audio is not played, the high-frequency noise caused by the replay of the high-frequency part of the noise-cancelling signal is avoided, and the noise floor of the audio playback device is further reduced.
  • the low-frequency output circuit can first filter the noise-cancelling signal to obtain the low-frequency part of the noise-cancelling signal, and then play the low-frequency part of the noise-cancelling signal through the first speaker. , you can also play the low-frequency part of the noise-cancelling signal by using the device characteristics of the first speaker. The two methods will be described in detail below:
  • the above-mentioned low-frequency output circuit is used to play the low-frequency part of the noise canceling signal by using the device characteristics of the first speaker, and the device characteristics of the first speaker make the first speaker meet the preset low frequency output condition.
  • the above-mentioned low-frequency output circuit is used to play the low-frequency part of the above-mentioned noise canceling signal by utilizing the device characteristics of the first speaker, wherein the device characteristics of the first speaker make the first speaker meet preset low-frequency output conditions.
  • the above-mentioned low-frequency output condition includes that the frequency band of the output signal of the first speaker is within a preset low-frequency frequency range, and generally, a signal whose signal frequency is less than 1 KHz is called a low-frequency signal.
  • the first speaker when the first speaker plays the low-frequency part of the noise-cancelled signal, it can also play the intermediate-frequency part of the noise-cancelled signal.
  • a signal with a signal frequency between 1KHz-6KHz can be called an intermediate-frequency signal. Therefore, the above-mentioned low-frequency output condition may further include that the output signal of the first speaker has the characteristics of high low-frequency amplitude and gentle mid-frequency amplitude.
  • the above-mentioned low-frequency output condition further includes that the sound pressure change of the output signal of the first speaker is less than a preset threshold, wherein the sound pressure change of the output signal of the first speaker is the atmospheric pressure disturbed by the output signal of the first speaker. subsequent changes.
  • the device characteristics of the first speaker include the acoustic resistance characteristics of the sound hole tuning net of the horn of the first speaker and/or the damping characteristics of the diaphragm material. Taking an earphone as an example, the horn of the first speaker of the earphone can be adjusted by adjusting the horn of the first speaker.
  • the acoustic resistance characteristics of the sound hole tuning net make it meet the above-mentioned low frequency output conditions, so that the first speaker can play a low frequency signal or a low frequency signal; Satisfy the above low-frequency output conditions, so that the first speaker can play a low-frequency signal or a medium-low frequency signal; alternatively, the acoustic resistance characteristics of the horn sound hole tuning net of the first speaker of the earphone and the damping characteristics of the diaphragm material can be adjusted at the same time, To make it meet the above-mentioned low-frequency output conditions, or, other device characteristics of the first speaker of the earphone may also be adjusted, which are not limited in the embodiments of the present application.
  • the first speaker may be a bass speaker, and the first speaker may be any one of an electrodynamic speaker, an electrostatic speaker, an electromagnetic speaker, and a piezoelectric speaker.
  • the low-frequency output circuit of the audio playback device can play the low-frequency part of the noise-cancelling signal by using the device characteristics of the first speaker, because the device characteristics of the first speaker can make the first speaker meet the preset low-frequency output conditions, so Using the device characteristics of the first speaker, the low-frequency part of the noise-cancelling signal can be played, and there is no need to design other filter components in the audio playback device, which can simplify the circuit cost of the audio playback device; in addition, using the device characteristics of the first speaker to play The low-frequency part of the noise-cancelled signal avoids the noise reproduction of the high-frequency signal in the non-noise-noise frequency band.
  • the above-mentioned low-frequency output circuit further includes: a first filter 20 ; and the first filter 20 is used for filtering the de-noised signal to obtain a low-frequency part in the de-noised signal.
  • the first filter 20 of the low-frequency output circuit first filters the de-noised signal to obtain the low-frequency part of the de-noised signal, and then plays the low-frequency part of the de-noised signal through the first speaker 10 .
  • the low-frequency part of the de-noised signal obtained by filtering the de-noised signal by the first filter 20 may be a signal with a frequency of less than 1 KHz in the de-noised signal.
  • the first speaker may be a bass speaker, and the first speaker may be any one of an electrodynamic speaker, an electrostatic speaker, an electromagnetic speaker, and a piezoelectric speaker.
  • the first filter in the low-frequency output circuit can filter the noise-cancelling signal to obtain the low-frequency part of the noise-cancelling signal, and then the low-frequency part of the noise-cancelling signal can be directly played through the first speaker, and the implementation process is relatively simple. Simple; in addition, the first filter filters the de-noising signal to obtain the low-frequency part of the de-noising signal, and the low-frequency part of the de-noising signal is also played through the first speaker, avoiding the high frequency of the non-noising frequency band. Noise playback of the signal.
  • the noise signal collected by the acquisition circuit may include an environmental noise signal.
  • the above-mentioned acquisition circuit includes a first acquisition circuit; the first acquisition circuit is used to collect environmental noise signals; and the noise reduction circuit is used to perform noise reduction processing on the environmental noise signals to obtain a noise signal.
  • the audio playback device performs noise reduction processing on the acquired environmental noise signal to obtain a noise reduction signal.
  • the noise reduction processing performed by the audio playback device on the acquired noise signal may be to directly generate a sound wave with the same amplitude, frequency and opposite phase as the above-mentioned environmental noise signal to obtain the above-mentioned denoising signal, or it may be to directly generate the above-mentioned environmental noise signal. The signal is inverted to obtain the above-mentioned denoised signal.
  • the first acquisition circuit of the acquisition circuit can collect the environmental noise signal, and the noise reduction circuit can perform noise reduction processing on the collected environmental noise signal to obtain a noise cancellation signal, and the environmental noise signal can be canceled by the noise cancellation signal, thereby improving the The noise reduction effect of the audio playback device ensures the sound quality of the audio signal being played.
  • the noise reduction circuit may include a first active noise reduction filter and a first dynamic compressor.
  • the above noise reduction circuit includes a first active noise reduction filter 30 and a first dynamic compressor 40; The inversion process is performed to obtain an inversion environmental noise signal; the first dynamic compressor 40 is used for compressing the amplitude of the inversion environmental noise signal within a preset first amplitude range to obtain a denoising signal corresponding to the environmental noise signal.
  • the above-mentioned noise reduction circuit includes a first active noise reduction filter 30 and a first dynamic compressor 40, wherein the first active noise reduction filter 30 generates a an anti-phase environmental noise signal with the same phase and opposite to the environmental noise signal; the first dynamic compressor 40 compresses the amplitude of the anti-phase environmental noise signal obtained by the first active noise reduction filter to a preset first amplitude range, The denoising signal corresponding to the environmental noise signal is obtained.
  • the audio playback device will output it according to the original setting, but when the inverse phase obtained by the first active noise reduction filter
  • the first dynamic compressor 40 can compress the amplitude of the obtained anti-phase ambient noise signal to limit it within a range, and the first active noise reduction filter obtains
  • the first dynamic limiter 40 will not work when the reversed-phase ambient noise signal is very small, only when the power of the reversed-phase ambient noise signal obtained by the first active noise reduction filter exceeds the preset first dynamic
  • the first dynamic compressor 40 will work only when the compressor 40 has a threshold.
  • the first active noise reduction filter included in the noise reduction circuit can perform inversion processing on the environmental noise signal to obtain the inversion environmental noise signal, and then the obtained inversion environmental noise signal can be obtained through the first dynamic compressor.
  • the amplitude of the noise signal is compressed within a preset first amplitude range to obtain a denoising signal corresponding to the ambient noise signal, thereby ensuring that the amplitude of the denoising signal corresponding to the ambient noise signal played by the speaker is limited to a safe range played by the speaker .
  • the noise signal collected by the collection circuit also includes a residual noise signal.
  • the above-mentioned acquisition circuit further includes a second acquisition circuit, the second acquisition circuit is used to collect residual noise signals; and the noise reduction circuit is used to reduce the environmental noise signal and the residual noise signal. Noise processing to get the de-noised signal.
  • the second collection circuit included in the collection circuit is used to collect residual noise signals
  • the noise reduction circuit is used to perform noise reduction processing on the environmental noise signal and the residual noise signal to obtain a noise reduction signal.
  • the noise reduction circuit may perform noise reduction processing on the environmental noise signal and the residual noise signal respectively, for example, perform inversion processing on the environmental noise signal to obtain a denoised signal whose phase is opposite to that of the environmental noise signal.
  • the phase inversion process is performed to obtain a de-noised signal whose phase is opposite to that of the residual noise signal.
  • the second collection circuit included in the collection circuit can collect residual noise signals, and the noise reduction circuit can perform noise reduction processing on the collected environmental noise signals and residual noise signals to obtain a noise reduction signal, and the noise reduction signal can both cancel
  • the external environmental noise signal can cancel the residual noise signal in the ear canal, which further reduces the noise floor of the audio playback device.
  • the noise reduction circuit further includes a second active noise reduction filter and a second dynamic compressor.
  • the above noise reduction circuit further includes a second active noise reduction filter 50 and a second dynamic compressor 60; the second active noise reduction filter 50 is used for the residual noise signal Perform inversion processing to obtain an inversion residual noise signal; the second dynamic compressor 60 is used for compressing the amplitude of the inversion residual noise signal to a preset second amplitude range to obtain a denoising signal corresponding to the residual noise signal .
  • the above noise reduction circuit further includes a second active noise reduction filter 50 and a second dynamic compressor 60, wherein the second active noise reduction filter 50 is based on the residual noise signal collected by the second collection circuit, generating an anti-phase residual noise signal with the same phase and opposite to the residual noise signal; the second dynamic compressor 60 compresses the amplitude of the anti-phase residual noise signal obtained by the second active noise reduction filter to a preset second amplitude range , to obtain the de-noised signal corresponding to the residual noise signal.
  • the second dynamic compressor 60 can compress the amplitude of the obtained anti-phase residual noise signal to limit it within a range, and in the second active noise reduction filter.
  • the second dynamic compressor 60 will not work, only when the power of the inverted ambient noise signal obtained by the second active noise reduction filter 50 exceeds the preset value The second dynamic compressor 60 will work only when the second dynamic compressor 60 is limited.
  • the second active noise reduction filter included in the noise reduction circuit can perform inversion processing on the residual noise signal to obtain an inversion residual noise signal, and then the obtained inversion residual noise signal can be processed by the second dynamic compressor.
  • the amplitude of the noise signal is compressed to a preset first amplitude range to obtain a de-noising signal corresponding to the residual noise signal, thereby ensuring that the amplitude of the de-noising signal corresponding to the residual noise signal played by the speaker is limited to a safe range played by the speaker .
  • the audio playback device needs to play an audio signal. If the audio playback device has an audio signal to be played, the audio playback device can also fuse the to-be-played audio signal and the obtained noise reduction signal to obtain a fusion audio signal, which is output through the low frequency.
  • the circuit plays the low frequency portion of the fused audio signal.
  • the above audio playback device further includes an audio acquisition circuit and a fusion circuit; the audio acquisition circuit is used to acquire the audio signal to be played; the fusion circuit is used to combine the audio signal to be played with the noise cancellation The signals are fused to obtain a fused audio signal; the low-frequency output circuit is used to play the low-frequency part of the fused audio signal through the first speaker 10 .
  • the audio signal to be played is obtained through the audio acquisition circuit of the audio playback device, and the fusion circuit of the audio playback device fuses the audio signal to be played with the above-mentioned noise cancelling signal to obtain a fusion audio signal, and the low-frequency output circuit passes the first
  • the loudspeaker 10 plays the low frequency part of the fused audio signal.
  • the audio signal to be played may also be pre-stored in the memory of the audio playback device, or obtained from other external audio devices.
  • the external audio device may be a speaker, a mobile phone, a TV, a computer, or a sound card. Wait.
  • the audio signal to be played may be a music signal, a voice signal, or other audio signals, etc., which is not limited in this embodiment.
  • the fusion circuit may superimpose the acquired audio signal to be played and the above-mentioned de-noising signal to obtain a fusion audio signal.
  • the low-frequency output circuit may filter the fused audio signal through the above-mentioned first filter to obtain the low-frequency part in the fused audio signal, and then play the low-frequency part in the fused audio signal through the second speaker.
  • the audio playback device can also play the low frequency part in the fusion audio signal by using the device characteristics of the first speaker, wherein the device characteristics of the first speaker make the first speaker meet the preset low frequency output conditions, optionally,
  • the preset low-frequency output condition includes that the frequency band of the output signal of the first speaker is within the preset low-frequency frequency range, and the output signal of the first speaker has the characteristics of high low frequency amplitude and flat intermediate frequency amplitude.
  • the low frequency output condition also includes: The sound pressure variation of the output signal including the first speaker is less than a preset threshold; optionally, the device characteristics of the first speaker include the acoustic resistance characteristics of the horn sound hole tuning net of the first speaker and/or the damping of the diaphragm material characteristic. It should be noted that, for the detailed introduction of the preset low frequency output condition satisfied by the first speaker and the detailed introduction of the device characteristics of the first speaker, please refer to the description of the above embodiment, which will not be repeated in this embodiment.
  • the audio acquisition circuit of the audio playback device can acquire the audio signal to be played, and the fusion circuit can fuse the audio signal to be played and the obtained noise reduction signal to obtain a fusion audio signal , the low-frequency output circuit can play the low-frequency part of the fusion audio signal, so that the sound quality of the played audio signal is taken into account while the noise signal is reduced, and the playback of the high-quality audio signal is ensured.
  • the residual noise signal in the ear canal is collected, and the audio signal played by the audio playback device will also be collected, and the collected audio signal played by the audio playback device will also become noise, therefore, this part of the noise needs to be denoised.
  • this part of the noise needs to be denoised.
  • the above-mentioned audio playback device further includes a compensation circuit; the above-mentioned acquisition circuit is also used to collect the audio signal in the ear canal; the compensation circuit is used to acquire the to-be-played audio signal from the above-mentioned audio acquisition circuit, and The audio signal to be played is transmitted to the noise reduction circuit; the noise reduction circuit is also used to invert the audio signal in the ear canal to obtain the inverted audio signal, and superimpose the audio signal to be played and the inverted audio signal to eliminate the The collected audio signal in the ear canal.
  • the acquisition circuit may be a microphone close to the ear canal in the audio playback device.
  • the audio signal in the ear canal may be a music signal, a voice signal, or the like, which is not limited in this embodiment.
  • the inverted audio signal of the audio signal in the ear canal refers to a signal whose phase is opposite to the collected audio signal in the ear canal.
  • the noise reduction circuit may invert the collected audio signal in the ear canal to obtain an inverted audio signal.
  • the noise reduction circuit can perform inverse processing on the collected audio signal in the ear canal through an active noise reduction filter to obtain an inverse audio signal, and can also generate an inverse audio signal according to the frequency and amplitude changes of the above-mentioned audio signal in the ear canal.
  • the above-mentioned inverted audio signal The compensation circuit obtains the audio signal to be played from the above-mentioned audio acquisition circuit, and transmits the audio signal to be played to the noise reduction circuit.
  • the noise reduction circuit can superimpose the audio signal to be played and the inverted audio signal to eliminate the collected audio in the ear canal. Signal.
  • the above-mentioned inverted audio signal is an audio signal whose phase is opposite to that of the audio signal to be played. Therefore, by superimposing the audio signal to be played and the inverted audio signal, the collected audio signal in the ear canal can be processed. to eliminate.
  • the acquisition circuit of the audio playback device can collect the audio signal in the ear canal
  • the compensation circuit can acquire the audio signal to be played from the audio acquisition circuit, and transmit the audio signal to be played to the noise reduction circuit.
  • the audio signal in the ear canal is inverted to obtain an inverted audio signal, and the audio signal in the ear canal collected is eliminated by superimposing the to-be-played audio signal and the inverted audio signal, thereby ensuring the sound quality of the audio signal to be played.
  • the high frequency part of the audio signal to be played may also be played.
  • the above-mentioned audio playback device further includes: a high-frequency output circuit, the high-frequency output circuit includes a second speaker 70 , and the high-frequency output circuit is used to pass The second speaker 70 plays the high frequency part of the audio signal to be played.
  • the audio playback device further includes a high-frequency output circuit that plays the high-frequency portion of the audio signal to be played, and the high-frequency output circuit includes a second speaker 70 .
  • a signal with a signal frequency between 6KHz-20KHz can be called a high-frequency signal.
  • the high-frequency output circuit plays the high-frequency part of the audio signal to be played through the second speaker 70, which can be the audio to be played.
  • the part of the signal whose frequency is between 6KHz-20KHz. It should be noted that, calling the signal with a signal frequency between 6KHz-20KHz as a high-frequency signal is to illustrate the signal of the high-frequency part of the audio signal to be played played in this embodiment.
  • the division of frequency signals is not limited to this.
  • the high-frequency output circuit plays the high-frequency part of the audio signal to be played, the high-frequency part of the audio signal to be played can be played through the tweeter included in the high-frequency output circuit, or the audio to be played can be played through the high-frequency output circuit.
  • the signal is filtered to obtain the high-frequency part of the audio signal to be played, and then the high-frequency part of the audio signal to be played is played.
  • the above-mentioned high-frequency output circuit is used to play the high-frequency part of the audio signal to be played by using the device characteristics of the second speaker 70, and the device characteristics of the second speaker 70 make the second speaker 70 satisfy the preset high-frequency output condition.
  • the above-mentioned high frequency output condition includes that the frequency band of the output signal of the second speaker 70 is within a preset high frequency frequency range, and generally, a signal with a signal frequency between 6KHz-20KHz is called a high frequency signal.
  • the device characteristics of the second speaker 70 include at least one of the type of the diaphragm material, the Young's modulus of the diaphragm material, the damping characteristics of the diaphragm material, the quality of the speaker vibration system, and the size of the coil of the speaker, so as to Taking an earphone as an example, the type of the diaphragm material of the second speaker of the earphone can be adjusted to meet the above-mentioned high-frequency output conditions, so that the second speaker can play the high-frequency signal in the audio signal to be played; The Young's modulus of the diaphragm material of the second speaker makes it meet the above-mentioned high-frequency output conditions, so that the second speaker can play the high-frequency signal in the audio signal to be played; The damping characteristics of the diaphragm material make it meet the above-mentioned high-frequency output conditions, so that the second speaker can play the high-frequency signal in the audio signal to be played; high-frequency output conditions, so that the second
  • the sound pressure of the output signal of the second speaker 70 is higher than the sound pressure of the output signal of the first speaker 10, that is to say, the change of the atmospheric pressure after being disturbed by the output signal of the second speaker 70 is greater than that of the atmospheric pressure when the first speaker 70 is disturbed.
  • the second speaker 70 may be a tweeter.
  • the second speaker 70 may be any one of an electrodynamic speaker, an electrostatic speaker, an electromagnetic speaker, and a piezoelectric speaker.
  • the second case the above-mentioned high-frequency output circuit further includes a second filter, and the second filter filters the audio signal to be played to obtain the high-frequency part of the audio signal to be played.
  • the high-frequency output circuit first filters the audio signal to be played through the second filter to obtain the high-frequency part of the audio signal to be played, and then uses the second speaker of the high-frequency output circuit to play the audio signal to be played.
  • high frequency part the high frequency part of the audio signal to be played obtained by filtering the audio signal to be played by the audio playback device may be a signal with a frequency of 6KHz-20KHz in the audio signal to be played.
  • the high frequency output circuit included in the audio playback device can play the high frequency part of the audio signal to be played.
  • the audio playback By playing the low frequency part of the audio signal to be played and the high frequency part of the audio signal to be played separately, the audio playback The high-frequency part of the audio signal to be played played by the device will not have the noise of the high-frequency signal in the non-noise reduction frequency band, thus ensuring the sound quality of the audio signal to be played; Playing the high frequency part of the audio signal ensures the integrity of the audio signal to be played.
  • the audio playback device further includes an equalizer 80, which 80 is used for gain adjustment of the audio signal to be played.
  • the audio playback device further includes an equalizer 80, and the equalizer 80 can also adjust the gain of the audio signal to be played before playing the audio signal to be played. It can be understood that, by adjusting the gain of the audio signal to be played, the playing quality of the audio signal to be played can be improved by adjusting the electrical signals of various frequencies.
  • an audio playback device comprising: an acquisition module, a noise reduction module and a playback module, wherein:
  • the first acquisition module is used to acquire the noise signal.
  • the noise reduction module is used to perform noise reduction processing on the noise signal to obtain the noise reduction signal.
  • the first playing module is used for playing the low-frequency part in the noise-cancelling signal through the first loudspeaker.
  • the audio playback device provided in this embodiment can execute the above method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.
  • the foregoing first playback module includes a first playback unit, wherein:
  • a first playing unit configured to filter the noise-cancelling signal to obtain a low-frequency part in the noise-cancelling signal, and play the low-frequency part in the noise-cancelling signal through the first speaker;
  • the low-frequency part in the noise-cancelling signal is played by utilizing the device characteristics of the first loudspeaker, and the device characteristics of the first loudspeaker enable the first loudspeaker to satisfy preset low-frequency output conditions.
  • the low frequency output condition includes that the frequency band of the output signal of the first speaker is within a preset low frequency range, and the output signal of the first speaker has the characteristics of high low frequency amplitude and gentle mid frequency amplitude.
  • the low-frequency output condition further includes that the sound pressure variation of the output signal of the first speaker is smaller than a preset threshold.
  • the device characteristic of the first speaker includes the acoustic resistance characteristic of the horn sound hole tuning net of the first speaker and/or the damping characteristic of the diaphragm material.
  • the audio playback device provided in this embodiment can execute the above method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.
  • the noise signal includes an environmental noise signal
  • the above noise reduction module includes: a noise reduction unit, wherein:
  • the noise reduction unit is used to perform noise reduction processing on the environmental noise signal to obtain the noise reduction signal.
  • the audio playback device provided in this embodiment can execute the above method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.
  • the noise signal further includes a residual noise signal
  • the noise reduction unit is configured to perform noise reduction processing on the environmental noise signal and the residual noise signal to obtain a noise reduction signal.
  • the audio playback device provided in this embodiment can execute the above method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.
  • the above-mentioned apparatus further includes: a second acquisition module, a fusion module and a second playback module, wherein:
  • the second acquiring module is used to acquire the audio signal to be played.
  • the fusion module is used to fuse the audio signal to be played and the denoising signal to obtain a fused audio signal.
  • the second playing module is used for playing the low frequency part in the fusion audio signal through the first speaker.
  • the audio playback device provided in this embodiment can execute the above method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.
  • the audio playback device provided in this embodiment can execute the above method embodiments, and the implementation principles and technical effects thereof are similar, and are not repeated here.
  • the foregoing device further includes: an adjustment module, wherein:
  • the adjustment module is used to adjust the gain of the audio signal to be played.
  • the audio playback device provided in this embodiment can execute the above method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.
  • the foregoing apparatus further includes: a third playback module, wherein:
  • the third playing module is used for playing the high frequency part of the audio signal to be played through the second speaker.
  • the audio playback device provided in this embodiment can execute the above method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.
  • the above-mentioned third playing module includes: a second playing unit, wherein:
  • the second playing unit is used to filter the audio signal to be played to obtain the high frequency part of the audio signal to be played, and play the high frequency part of the audio signal to be played through the second speaker;
  • the device characteristics of the second speaker are used to play the high frequency part of the audio signal to be played, and the device characteristics of the second speaker make the second speaker meet preset high frequency output conditions.
  • the high frequency output condition includes that the frequency band of the output signal of the second speaker is within a preset high frequency frequency range.
  • the device characteristic of the second speaker includes at least one of the type of the diaphragm material, the Young's modulus of the diaphragm material, the damping characteristic of the diaphragm material, the mass of the speaker vibration system, and the size of the coil of the speaker.
  • the sound pressure of the output signal of the second speaker is higher than the sound pressure of the output signal of the first speaker.
  • the audio playback device provided in this embodiment can execute the above method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.
  • Each module in the above audio playback device can be implemented in whole or in part by software, hardware and combinations thereof.
  • the above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or stored in the memory in the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.
  • an audio playback device including a memory and a processor, where a computer program is stored in the memory, and the processor implements the following steps when executing the computer program:
  • Noise reduction processing is performed on the noise signal to obtain a noise reduction signal
  • the low frequency portion of the noise-cancelled signal is played through the first speaker.
  • a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:
  • Noise reduction processing is performed on the noise signal to obtain a noise reduction signal
  • the low frequency portion of the noise-cancelled signal is played through the first speaker.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

本申请公开了一种音频播放方法和音频播放设备。所述音频播放方法包括：获取噪声信号；对噪声信号进行降噪处理，得到消噪信号；通过第一扬声器播放消噪信号中的低频部分。采用该音频播放方法能够避免对该音频信号中非降噪频段的高频部分的噪声重放，进一步降低了音频播放设备的底噪。

Description

音频播放方法和音频播放设备
相关申请
本申请要求2021年04月29日申请的，申请号为2021104752604，名称为“音频播放方法和音频播放设备”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本申请涉及降噪技术领域，更具体的说，涉及一种音频播放方法和音频播放设备。
背景技术
随着降噪技术的发展，用户对耳机的降噪要求也越来越高，因此，耳机不仅需要具备良好的降噪效果，还要保证播放的音频信号的音质。传统技术中，主动降噪(Active Noise Cancellation，ANC)耳机通过设置在耳机内部的降噪模块产生与外界噪音对应的反相声波，将外界噪音中和，得到去噪后的音频信号。
然而，用户往往发现在开启ANC功能且未播放音频时，耳机底噪比未开启ANC功能时更明显。
发明内容
有鉴于此，本申请提供一种能够在保证音频信号高音质的同时能够改善底噪增噪问题的音频播放方法和音频播放设备。
一种音频播放方法，所述方法包括：
获取噪声信号；
对所述噪声信号进行降噪处理，得到消噪信号；
通过第一扬声器播放所述消噪信号中的低频部分。
一种音频播放设备，所述音频播放设备包括：采集电路、降噪电路和低频输出电路，所述低频输出电路包括第一扬声器，其中，
所述采集电路，用于采集噪声信号；
所述降噪电路，用于对所述噪声信号进行降噪处理，得到消噪信号；
所述低频输出电路，用于通过所述第一扬声器播放所述消噪信号中的低频部分。
从上述的技术方案可知，本申请公开了一种音频播放方法和音频播放设备，通过对获取的噪声信号进行降噪处理，得到消噪信号，通过第一扬声器播放得到的消噪信号中的低频部分，而播放的消噪信号中的低频部分能够将噪声信号中的低频部分抵消，并且，第一扬声器不会播放消噪信号中的高频部分，相比于传统技术中的采用全频段扬声器播放消噪信号的方式，本申请实施例的音频播放方法由于第一扬声器播放的是消噪信号中的低频部分，不会出现非降噪频段的高频信号被重放的情况，尤其是在开启ANC功能且未播放音频时，避免了消噪信号中的高频部分被重放引起的高频噪声，进一步降低了音频播放设备的底噪。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据公开的附图获得其他的附图。
图1为一个实施例中音频播放方法的应用环境示意图；
图2为一个实施例中音频播放方法的流程示意图；
图3为一个实施例中音频播放方法的流程示意图；
图4为一个实施例中音频播放设备的示意图；
图5为一个实施例中音频播放设备的示意图；
图6为一个实施例中音频播放设备的示意图；
图7为一个实施例中音频播放设备的示意图；
图8为一个实施例中音频播放设备的示意图；
图9为一个实施例中音频播放装置的结构框图；
附图标记说明：
第一扬声器：10；                      第一滤波器：20；
第一主动降噪滤波器30；                第一动态压限器40；
第二主动降噪滤波器：50；              第二动态压限器：60；
第二扬声器70；                        均衡器：80。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请提供的音频播放方法，可以应用于如图1所示的应用环境中，其中，耳机接收外部音频设备发送的音频信号或者获取耳机内部存储的音频信号，利用贴近耳朵的扬声器将其转化为用户可以听到的音频信号。示例性地，对于前馈式耳机可以包括如图1中所示的第一收音麦克风，对于反馈式耳机可以包括如图1中所示的靠近耳道的第二收音麦克风，对于混合式耳机可以包括如图1所示的第一收音麦克风和第二收音麦克风。
由于使用耳机时，外界的环境噪声信号会对播放的音频信号造成干扰，传统技术中的主动降噪方法主要是通过设置在耳机内部的降噪模块产生与外界噪音对应的反相声波，将外界噪音中和，得到去噪后的音频信号。传统的主动降噪方法由于噪声信号的低频部分波长较长，可承受一定的相位延迟，而噪声信号高频部分波长短，对相位偏差敏感，因此，采用降噪模块产生与外界噪音对应的反相声波的消噪信号将外界噪音中和，这种降噪方法对噪声信号中的高频部分进行降噪处理的效果并不明显，并且，传统的主动降噪方法采用全频段的扬声器来播放消噪信号，使得消噪信号中的高频部分被重放，高频重放导致耳机的底噪增大，尤其是在开启耳机的主动降噪功能且未播放音频信号时，耳机的底噪比未开启主动降噪功能时更加明显。因此，有必要提供一种能够保证音频信号高音质的同时能够改善底噪增噪问题的音频播放方法和音频播放设备。
因此，为了解决上述问题，在一个实施例中，如图2所示，提供了一种音频播放方法，以该方法应用于图1中的耳机为例进行说明，包括以下步骤：
S201，获取噪声信号。
通常，在使用音频播放设备，例如耳机或头戴音频播放设备的情况下，由于音频播放设备工作时的噪声信号将影响所播放的音频信号的音质体验，例如，该噪声信号可以包括外部的环境噪声信号，还可以包括耦合进耳道内的残余噪声信号等，因此，就需要对这些噪声信号进行降噪处理以提高音频播放设备播放的音频信号的音质。可选的，在音频播放设备获取的噪声信号是外界环境噪声信号的情况下，可以由音频播放设备外部的前馈采集单元获取到上述噪声信号。可选的，在音频播放设备获取的噪声信号包括外界环境噪声信号和音频播放设备内的残余噪声信号的情况下，可以由音频播放设备外部的前馈采集单元获取外界环境噪声信号，由音频播放设备内部的反馈采集单元获取音频播放设备内的残余噪声信号。
S202，对噪声信号进行降噪处理，得到消噪信号。
在本实施例中，音频播放设备对上述获取的噪声信号进行降噪处理，得到消噪信号。示例性地，若获取的噪声信号为环境噪声信号，则音频播放设备对获取的环境噪声信号进行降噪处理，得到消噪信号；若获取的噪声信号包括环境噪声信号和残余噪声信号，则音频播放设备对获取的环境噪声信号和残余噪声信号均需要进行降噪处理，得到消噪信号。可选的，音频播放设备对上述获取的噪声信号进行的降噪处理，可以是产生与上述噪声信号相同却完全相反的声波得到上述消噪信号，或者，音频播放设备可以对噪声信号进行反相处理，得到消噪信号。或者，还可以是根据噪声信号产生对应的反相信号之后，再进一步地对反相信号的幅度进行压限处理等，本申请实施例中不加以限制。
S203，通过第一扬声器播放消噪信号中的低频部分。
通常，将信号频率小于1KHz的信号称为低频信号，需要说明的是，小于1KHz的信号称为低频信号是对本实施例中的低频部分进行举例说明，本申请实施例中对低频信号的划分并不以此为限。例如，在本实施例中，第一扬声器播放消噪信号中的低频部分可以是上述消噪信号中频率小于1KHz部分的信号。可选的，在本实施例中，第一扬声器可以是低音扬声器，通过该低音扬声器播放消噪信号中的低频部分，可以通过设置第一扬声器的器件特性使得第一扬声器播放消噪信号中的低频部分，或者，也可以是在第一扬声器内部设置滤波器，通过内置的滤波器对消噪信号进行滤波得到低频部分，在通过第一扬声器低频部分。可选的，第一扬声器可以为电动式扬声器、静电式扬声器、电磁式扬声器、压电式扬声器中的任一种。
上述音频播放方法中，通过对获取的噪声信号进行降噪处理，得到消噪信号，通过第一扬声器播放得到的消噪信号中的低频部分，而播放的消噪信号中的低频部分能够将噪声信号中的低频部分抵消，并且，第一扬声器不会播放消噪信号中的高频部分，相比于传统技术中的采用全频段扬声器播放消噪信号的方式，本申请实施例的音频播放方法由于第一扬声器播放的是消噪信号中的低频部分，不会出现非降噪频段的高频信号被重放的情况，尤其是在开启ANC功能且未播放音频时，避免了消噪信号中的高频部分被重放引起的高频噪声，进一步降低了音频播放设备的底噪。
在上述通过第一扬声器播放消噪信号中的低频部分的场景中，可以先对消噪信号进行滤波得到消噪信号中的低频部分，再通过第一扬声器播放消噪信号中的低频部分，也可以利用第一扬声器的器件特性播放消噪信号中的低频部分，下面将分别对这两种方式进行详细说明：
场景一：上述S203包括：对消噪信号进行滤波得到消噪信号中的低频部分，通过第一扬声器播放消噪信号中的低频部分。
在本实施例中，音频播放设备先对得到的消噪信号进行滤波得到消噪信号中的低频部分，再通过第一扬声器播放得到的消噪信号中的低频部分。例如，可以在第一扬声器之前设置滤波器，通过滤波器对得到的消噪信号进行滤波得到消噪信号中的低频部分，再由第一扬声器播放该消噪信号中的低频部分。可选的，音频播放设备对消噪信号进行滤波得到的消噪信号中的低频部分可以是消噪信号中频率小于1KHz的信号。
本实施例中，通过对消噪信号进行滤波能够得到消噪信号中的低频部分，这样通过第一扬声器就可以直接播放消噪信号中的低频部分，实现过程较为简单；另外，对消噪信号进行滤波得到的是消噪信号中的低频部分，通过第一扬声器播放的也是消噪信号中的低频部分，避免了对非降噪频段的高频信号的噪声重放。
场景二，上述S203包括：利用第一扬声器的器件特性播放消噪信号中的低频部分，第一扬声器的器件特性使得第一扬声器满足预设的低频输出条件。
在本实施例中，音频播放设备利用第一扬声器的器件特性播放消噪信号中的低频部分，其中，第一扬声器的器件特性使得第一扬声器满足预设的低频输出条件。可选的，上述低频输出条件包括第一扬声器的输出信号的频段位于预设的低频段范围内，通常，将信号频率小于1KHz的信号称为低频信号。
在一些场景中，第一扬声器在播放消噪信号中的低频部分时，还可以播放消噪信号中的中频部分，通常，可以将信号频率在1KHz-6KHz之间的信号称为中频信号。因此，上述低频输出条件还可以包括第一扬声器的输出信号具有低频幅度高且中频幅度平缓的特性。
可选的，上述低频输出条件还包括第一扬声器的输出信号的声压变化量小于预设阈值，其中，第一扬声器的输出信号的声压变化量即为大气压受到第一扬声器的输出信号扰动后产生的变化量。可选的，第一扬声器的器件特性包括第一扬声器的喇叭声孔调音网的声阻特性和/或振膜材料的阻尼特性，以耳机为例，可以通过调整耳机的第一扬声器的喇叭声孔调音网的声阻特性使其满足上述低频输出条件，从而让第一扬声器播放低频信号或中低频信号；或者，也可以通过调整耳机的第一扬声器的振膜材料的阻尼特性使其满足上述低频输出条件，从而让第一扬声器播放低频信号或中低频信号；又或者，还可以同时调整耳机的第一扬声器的喇叭声孔调音网的声阻特性和振膜材料的阻尼特性，使其满足上述低频输出条件，或者，还可以调整耳机的第一扬声器的其他器件特性，本申请实施例中不加以限制。
需要说明的是，信号频率小于1KHz的信号称为低频信号、以及信号频率在1KHz-6KHz之间的信 号称为中频信号仅用来举例说明本申请实施例中的低频信号、中频信号以及低频段范围，并不是对本申请实施例的限制。
本实施例中，音频播放设备利用第一扬声器的器件特性播放消噪信号中的低频部分，而第一扬声器的器件特性能够使得第一扬声器满足预设的低频输出条件，这样利用第一扬声器的器件特性就能够播放消噪信号中的低频部分，无需再在音频播放设备中设计其他滤波器件，这样能够简化音频播放设备的电路成本；另外，利用第一扬声器的器件特性播放消噪信号中的低频部分，避免了对非降噪频段的高频信号的噪声重放。
如前述场景描述中，对于前馈式耳机和混合式耳机，获取的噪声信号可以包括环境噪声信号，在一个实施例中，上述S202，包括：对环境噪声信号进行降噪处理，得到消噪信号。
在本实施例中，音频播放设备对获取的环境噪声信号进行降噪处理，得到消噪信号。可选的，音频播放设备对上述获取的噪声信号进行的降噪处理，可以是直接产生与上述环境噪声信号幅度、频率相同、相位相反的声波得到上述消噪信号，也可以是对上述环境噪声信号进行反相处理得到上述消噪信号。
本实施例中，音频播放设备对获取的环境噪声信号进降噪处理，能够得到消噪信号，通过该消噪信号能够抵消环境噪声信号，从而提高音频播放设备的降噪效果，保证播放的音频信号的音质。
如前述场景描述中，对于混合式耳机，获取的噪声信号可以包括残余噪声信号，在一个实施例中，上述S202，包括：对环境噪声信号和残余噪声信号进行降噪处理，得到消噪信号。
在本实施例中，音频播放设备对获取的环境噪声信号和残余噪声信号进行降噪处理，得到消噪信号。可选的，音频播放设备可以分别对环境噪声信号和残余噪声信号进行降噪处理，例如，对环境噪声信号进行反相处理，得到与环境噪声信号的相位相反的消噪信号，对残余噪声信号进行反相处理，得到与残余噪声信号的相位相反的消噪信号。
进一步地，还可以对环境噪声信号和残余噪声信号进行反相处理之后，得到反相环境噪声信号和反相残余噪声信号，并且，对反相环境噪声信号和反相残余噪声信号的幅度进行压限，得到消噪信号。例如，将反相环境噪声信号的幅度压缩至预设的第一幅度范围内，将残余噪声信号的幅度压缩至预设的第二幅度范围内。
本实施例中，音频播放设备对获取的环境噪声信号和残余噪声信号进降噪处理，能够得到消噪信号，通过该消噪信号既能够抵消外界的环境噪声信号，又可以抵消耳道内的残余噪声信号，进一步降低了音频播放设备的底噪。
进一步地，在本实施例中，当音频播放设备在播放音频信号时，采集残余噪声信号的同时也会采集到的耳道内音频信号。例如，通过设置在音频播放设备靠近耳道的拾音器采集残余噪声信号的同时也会采集到耳道内音频信号，那么也需要对耳道内音频信号进行降噪，以保证播放的音频信号的音质。例如，可以采用以下步骤对耳道内音频信号进行降噪：
S1，对耳道内音频信号进行反相处理，得到反相音频信号。其中，耳道内音频信号的反相音频信号是指与采集到的耳道内音频信号相位相反的信号。在本实施例中，音频播放设备可以将采集到的耳道内音频信号进行反相，得到反相音频信号。可选的，音频播放设备可以通过主动降噪滤波器对采集到的耳道内音频信号进行反相处理，得到反相音频信号，也可以根据上述耳道内音频信号的频率、幅度变化等特性，生成上述反相音频信号。
S2，将待播放音频信号与反相音频信号叠加处理，以消除采集到的耳道内音频信号。可以理解的是，上述反相音频信号是与待播放音频信号的相位相反的音频信号，因此，通过将待播放音频信号与反相音频信号进行叠加处理，即可以将采集到的耳道内音频信号进行消除。
本实施例中，音频播放设备通过对采集到的耳道内音频信号进行反相处理，能够得到与该耳道内音频信号相反的反相音频信号，进而可以将待播放音频信号与该反相音频信号进行叠加处理，消除采集到的耳道内音频信号，从而确保播放的音频信号的音质。
在大多数场景中，音频播放设备需要播放音频信号，若音频播放设备存在待播放音频信号，音频播放设备还可以将待播放音频信号和得到的消噪信号进行融合得到融合音频信号，通过第一扬声器播放融合音频信号中的低频部分。在一个实施例中，如图3所示，上述方法还包括：
S301，获取待播放音频信号。
可以理解的是，在使用音频播放设备播放音频信号时，音频播放设备可以首先获取待播放音频信号。可选的，在本实施例中，音频播放设备可以通过自身的拾音器获取待播放音频信号，待播放音频信号也可以是预先存储在音频播放设备的存储器中的，还可以是从其他外部音频设备中获取的，例如，外部音频设备可以是音箱、手机、电视、电脑、声卡等。可选的，待播放音频信号可以为音乐信号，也可以为语音信号，也可以为其它音频信号等，本实施例并不以此为限。
S302，将待播放音频信号与消噪信号进行融合，得到融合音频信号。
在本实施例中，音频播放设备获取到待播放音频信号后，音频播放设备将上述获取的待播放音频信号与上述得到的消噪信号进行融合，得到融合音频信号。可选的，音频播放设备可以通过预设的融合器对上述获取的待播放音频信号和上述得到的消噪信号进行叠加，得到融合音频信号。
S303，通过第一扬声器播放融合音频信号中的低频部分。
在本实施例中，音频播放设备通过上述第一扬声器播放融合音频信号中的低频部分。可选的，音频播放设备可以对融合音频信号进行滤波得到融合音频信号中的低频部分，通过第一扬声器播放融合音频信号中的低频部分。可选的，音频播放设备也可以利用第一扬声器的器件特性播放消噪信号中的低频部分，其中，第一扬声器的器件特性使得第一扬声器满足预设的低频输出条件，可选的，预设的低频输出条件包括第一扬声器的输出信号的频段位于预设的低频段范围内，且第一扬声器的输出信号具有低频幅度高且中频幅度平缓的特性，可选的，低频输出条件还包括第一扬声器的输出信号的声压变化量小于预设阈值；可选的，第一扬声器的器件特性包括第一扬声器的喇叭声孔调音网的声阻特性和/或振膜材料的阻尼特性。需要说明的是，关于第一扬声器满足的预设的低频输出条件的详细介绍以及第一扬声器的器件特性的详细介绍请参见上述实施例的描述，本实施例在此不再赘述。
本实施例中，若音频播放设备存在待播放音频信号，音频播放设备将获取待播放音频信号，将待播放音频信号与得到的消噪信号进行融合，得到融合音频信号，通过第一扬声器播放融合音频信号中的低频部分，这样，在对噪声信号进行降噪的同时兼顾了播放的音频信号的音质，确保了高品质音频信号的播放。
在上述音频播放设备内存在待播放音频信号的场景中，还可以对待播放音频信号的增益值进行调节，在一个实施例中，上述方法还包括：对待播放音频信号进行增益调节。
在本实施例中，音频播放设备在播放待播放音频信号之前，还可以对待播放音频信号的增益进行调节。可选的，音频播放设备可以通过均衡器对待播放音频信号的增益进行调节。可以理解的是，通过对待播放音频信号的增益进行调节，能够通过对各种不同频率的电信号的调节来提高待播放音频信号的播放音质。
在上述通过第一扬声器播放融合音频信号中的低频部分的场景中，为了保证音频信号的完整，还可以对待播放音频信号中的高频部分进行播放。在上述实施例的基础上，在一个实施例中，上述方法还包括：通过第二扬声器播放待播放音频信号中的高频部分。
在本实施例中，音频播放设备通过第二扬声器播放待播放音频信号中的高频部分。可选的，第二扬声器可以是高音扬声器。可选的，该第二扬声器可以为电动式扬声器、静电式扬声器、电磁式扬声器、压电式扬声器中的任一种。通常，可以将信号频率在6KHz-20KHz之间的信号称为高频信号，本实施例中，通过第二扬声器播放待播放音频信号中的高频部分播放，可以是待播放音频信号中的信号频率在6KHz-20KHz之间的部分。需要说明的是，将信号频率在6KHz-20KHz之间的信号称为高频信号是对本实施例中播放的待播放音频信号中的高频部分的信号进行举例说明，本申请实施例中对高频信号的划分并不以此为限。可选的，第二扬声器的输出信号的声压高于第一扬声器的输出信号的声压，也就是说，大气压受到第二扬声器的输出信号扰动后产生的变化大于大气压受到第一扬声器的输出信号扰动后产生的变化。
可选的，通过第二扬声器播放待播放音频信号中的高频部分可以通过以下两种方式进行播放：
方式一，对待播放音频信号进行滤波得到待播放音频信号中的高频部分，通过第二扬声器播放待播放音频信号中的高频部分。
在本实施例中，音频播放设备先对待播放音频信号进行滤波得到待播放音频信号中的高频部分，再通过第二扬声器播放待播放音频信号中的高频部分。例如，可以在第二扬声器之前设置滤波器，通过滤 波器对待播放音频信号进行滤波得到待播放音频信号中的高频部分，再由第二扬声器播放待播放音频信号中的高频部分。可选的，音频播放设备对待播放音频信号进行滤波得到的待播放音频信号中的高频部分，可以是待播放音频信号中频率为6KHz-20KHz间的信号。
方式二，利用所述第二扬声器的器件特性播放所述待播放音频信号中的高频部分，所述第二扬声器的器件特性使得所述第二扬声器满足预设的高频输出条件。
在本实施例中，音频播放设备利用第二扬声器的器件特性播放待播放音频信号中的高频部分，其中，第二扬声器的器件特性使得第二扬声器满足预设的高频输出条件。可选的，上述高频输出条件包括第二扬声器的输出信号的频段位于预设的高频段范围内，通常，将信号频率在6KHz-20KHz之间的信号称为高频信号。可选的，第二扬声器的器件特性包括振膜材料的类型、振膜材料的杨氏模量、振膜材料的阻尼特性、扬声器振动系统的质量、扬声器的线圈尺寸中的至少一个，以耳机为例，可以通过调整耳机的第二扬声器的振膜材料的类型使其满足上述高频输出条件，从而让第二扬声器播放待播放音频信号中的高频信号；或者，也可以通过调整耳机的第二扬声器的振膜材料的杨氏模量使其满足上述高频输出条件，从而让第二扬声器播放待播放音频信号中的高频信号；或者，也可以通过调整耳机的第二扬声器的振膜材料的阻尼特性使其满足上述高频输出条件，从而让第二扬声器播放待播放音频信号中的高频信号；或者，也可以通过调整耳机的第二扬声器振动系统的质量使其满足上述高频输出条件，从而让第二扬声器播放待播放音频信号中的高频信号；或者，也可以通过调整耳机的第二扬声器的线圈尺寸使其满足上述高频输出条件，从而让第二扬声器播放待播放音频信号中的高频信号，或者，还可以同时调整振膜材料的类型、振膜材料的杨氏模量、振膜材料的阻尼特性、扬声器振动系统的质量、扬声器的线圈尺寸中的多个器件特性，从而让第二扬声器播放待播放音频信号中的高频信号，或者，还可以调整耳机的第二扬声器的其他器件特性，本申请实施例中不加以限制。
本实施例中，音频播放设备通过第二扬声器播放待播放音频信号中的高频部分，将待播放音频信号的低频部分与待播放音频信号的高频部分分开播放，使得音频播放设备播放的待播放音频信号中的高频部分不会存在非降噪频段的高频信号的噪声，从而保证了播放的待播放音频信号的音质；另外，通过音频播放设备的第二扬声器播放待播放音频信号中的高频部分，保证了待播放音频信号的完整性。
应该理解的是，虽然图2-3的流程图中的各个步骤按照箭头的指示依次显示，但是这些步骤并不是必然按照箭头指示的顺序依次执行。除非本文中有明确的说明，这些步骤的执行并没有严格的顺序限制，这些步骤可以以其它的顺序执行。而且，图2-3中的至少一部分步骤可以包括多个步骤或者多个阶段，这些步骤或者阶段并不必然是在同一时刻执行完成，而是可以在不同的时刻执行，这些步骤或者阶段的执行顺序也不必然是依次进行，而是可以与其它步骤或者其它步骤中的步骤或者阶段的至少一部分轮流或者交替地执行。
在一个实施例中，如图4所示，提供了一种音频播放设备，包括采集电路、降噪电路和低频输出电路，低频输出电路包括第一扬声器，其中，采集电路，用于采集噪声信号；降噪电路，用于对噪声信号进行降噪处理，得到消噪信号；低频输出电路，用于通过第一扬声器播放消噪信号中的低频部分。
其中，上述音频播放设备可以为耳机。通常，在使用耳机或头戴音频播放设备的情况下，由于音频播放设备工作时的噪声信号将影响所播放的音频信号的音质体验，例如，该噪声信号可以包括外部的环境噪声信号，还可以包括耦合进耳道内的残余噪声信号等，因此，就需要对这些噪声信号进行降噪处理以提高音频播放设备播放的音频信号的音质。
在本实施例中，可选的，音频播放设备的采集电路采集的噪声信号可以是外界环境噪声信号，也可以是音频播放设备内的残余噪声信号，也可以是外界环境噪声信号和音频播放设备内的残余噪声信号。示例性地，若采集电路采集的噪声信号是外界环境噪声信号，则降噪电路对采集的外界环境噪声信号进行降噪处理，得到消噪信号；若采集电路采集的噪声信号包括外界环境噪声信号和残余噪声信号，则降噪电路对获取的外界环境噪声信号和残余噪声信号均需要进行降噪处理，得到消噪信号。可选的，降噪电路对上述获取的噪声信号进行的降噪处理，可以是产生与上述噪声信号相同却完全相反的声波得到上述消噪信号。或者，降噪电路可以对噪声信号进行反相处理，得到消噪信号。或者，降噪电路还可以是根据噪声信号产生对应的反相信号之后，再进一步地对反相信号的幅度进行压限处理等，本申请实施例中不加以限制。通常，将信号频率小于1KHz的信号称为低频信号，需要说明的是，小于1KHz的信号 称为低频信号是对本实施例中的低频部分进行举例说明，本申请实施例中对低频信号的划分并不以此为限。例如，在本实施例中，低频输出电路通过第一扬声器播放消噪信号中的低频部分可以是上述消噪信号中频率小于1KHz部分的信号。
上述音频播放设备，通过采集电路采集噪声信号，降噪电路对采集的噪声信号进行降噪处理，能够得到消噪信号，进而可以通过低频输出电路的第一扬声器播放消噪信号中的低频部分，而播放的消噪信号中的低频部分能够将噪声信号中的低频部分抵消，并且，低频输出电路不会播放消噪信号中的高频部分，相比于传统技术中的采用全频段扬声器播放消噪信号的方式，本申请实施例的音频播放方法由于低频输出电路播放的是消噪信号中的低频部分，不会出现非降噪频段的高频信号被重放的情况，尤其是在开启ANC功能且未播放音频时，避免了消噪信号中的高频部分被重放引起的高频噪声，进一步降低了音频播放设备的底噪。
在上述低频输出电路播放消噪信号中的低频部分的场景中，低频输出电路可以先对消噪信号进行滤波得到消噪信号中的低频部分，再通过第一扬声器播放消噪信号中的低频部分，也可以利用第一扬声器的器件特性播放消噪信号中的低频部分，下面将分别对这两种方式进行详细说明：
在一个实施例中，请继续参见图4，上述低频输出电路用于利用第一扬声器的器件特性播放述消噪信号中的低频部分，第一扬声器的器件特性使得第一扬声器满足预设的低频输出条件。
在本实施例中，上述低频输出电路用于利用第一扬声器的器件特性播放上述消噪信号中的低频部分，其中，第一扬声器的器件特性使得第一扬声器满足预设的低频输出条件。可选的，上述低频输出条件包括第一扬声器的输出信号的频段位于预设的低频段范围内，通常，将信号频率小于1KHz的信号称为低频信号。
在一些场景中，第一扬声器在播放消噪信号中的低频部分时，还可以播放消噪信号中的中频部分，通常，可以将信号频率在1KHz-6KHz之间的信号称为中频信号。因此，上述低频输出条件还可以包括第一扬声器的输出信号具有低频幅度高且中频幅度平缓的特性。
可选的，上述低频输出条件还包括第一扬声器的输出信号的声压变化量小于预设阈值，其中，第一扬声器的输出信号的声压变化量即为大气压受到第一扬声器的输出信号扰动后产生的变化量。可选的，第一扬声器的器件特性包括第一扬声器的喇叭声孔调音网的声阻特性和/或振膜材料的阻尼特性，以耳机为例，可以通过调整耳机的第一扬声器的喇叭声孔调音网的声阻特性使其满足上述低频输出条件，从而让第一扬声器播放低频信号或中低频信号；或者，也可以通过调整耳机的第一扬声器的振膜材料的阻尼特性使其满足上述低频输出条件，从而让第一扬声器播放低频信号或中低频信号；又或者，还可以同时调整耳机的第一扬声器的喇叭声孔调音网的声阻特性和振膜材料的阻尼特性，使其满足上述低频输出条件，或者，还可以调整耳机的第一扬声器的其他器件特性，本申请实施例中不加以限制。需要说明的是，信号频率小于1KHz的信号称为低频信号、以及信号频率在1KHz-6KHz之间的信号称为中频信号仅用来举例说明本申请实施例中的低频信号、中频信号以及低频段范围，并不是对本申请实施例的限制。可选的，第一扬声器可以为低音扬声器，第一扬声器可以为电动式扬声器、静电式扬声器、电磁式扬声器、压电式扬声器中的任一种。
本实施例中，音频播放设备的低频输出电路利用第一扬声器的器件特性能够播放消噪信号中的低频部分，由于第一扬声器的器件特性能够使得第一扬声器满足预设的低频输出条件，这样利用第一扬声器的器件特性就能够播放消噪信号中的低频部分，无需再在音频播放设备中设计其他滤波器件，这样能够简化音频播放设备的电路成本；另外，利用第一扬声器的器件特性播放消噪信号中的低频部分，避免了对非降噪频段的高频信号的噪声重放。
在一个实施例中，如图5所示，上述低频输出电路还包括：第一滤波器20；第一滤波器20，用于对消噪信号进行滤波得到消噪信号中的低频部分。
在本实施例中，低频输出电路的第一滤波器20首先对消噪信号进行滤波得到消噪信号中的低频部分，再通过第一扬声器10播放消噪信号中的低频部分。可选的，第一滤波器20对消噪信号进行滤波得到的消噪信号中的低频部分可以是消噪信号中频率小于1KHz的信号。可选的，第一扬声器可以为低音扬声器，第一扬声器可以为电动式扬声器、静电式扬声器、电磁式扬声器、压电式扬声器中的任一种。
本实施例中，低频输出电路中的第一滤波器能够对消噪信号进行滤波得到消噪信号中的低频部分， 再通过第一扬声器就可以直接播放消噪信号中的低频部分，实现过程较为简单；另外，第一滤波器对消噪信号进行滤波得到的是消噪信号中的低频部分，通过第一扬声器播放的也是消噪信号中的低频部分，避免了对非降噪频段的高频信号的噪声重放。
如前述场景描述中，以音频播放设备为前馈式耳机和混合式耳机为例，采集电路采集的噪声信号可以包括环境噪声信号。在一个实施例中，如图6所示，上述采集电路包括第一采集电路；第一采集电路，用于采集环境噪声信号；降噪电路，用于对环境噪声信号进行降噪处理，得到消噪信号。
在本实施例中，音频播放设备对获取的环境噪声信号进行降噪处理，得到消噪信号。可选的，音频播放设备对上述获取的噪声信号进行的降噪处理，可以是直接产生与上述环境噪声信号幅度、频率相同、相位相反的声波得到上述消噪信号，也可以是对上述环境噪声信号进行反相处理得到上述消噪信号。
本实施例中，采集电路的第一采集电路能够采集环境噪声信号，降噪电路能够对采集的环境噪声信号进行降噪处理得到消噪信号，通过该消噪信号能够抵消环境噪声信号，从而提高音频播放设备的降噪效果，保证播放的音频信号的音质。
在上述降噪电路对环境噪声信号进行降噪处理，得到上述消噪信号的场景中，降噪电路可以包括第一主动降噪滤波器和第一动态压限器。在一个实施例中，请继续参见图6，上述降噪电路包括第一主动降噪滤波器30和第一动态压限器40；第一主动降噪滤波器30，用于对环境噪声信号进行反相处理，得到反相环境噪声信号；第一动态压限器40，用于将反相环境噪声信号的幅度压缩至预设的第一幅度范围内，得到环境噪声信号对应的消噪信号。
在本实施例中，上述降噪电路包括第一主动降噪滤波器30和第一动态压限器40，其中，第一主动降噪滤波器30根据第一采集电路采集的环境噪声信号，产生与该环境噪声信号相同相位相反的反相环境噪声信号；第一动态压限器40将第一主动降噪滤波器得到的反相环境噪声信号的幅度压缩至预设的第一幅度范围内，得到该环境噪声信号对应的消噪信号。需要说明的是，当第一主动降噪滤波器得到的反相环境噪声信号不是很大的时候，音频播放设备会按照原来的设定输出，但是当第一主动降噪滤波器得到的反相环境噪声信号过大的时候，为了保护扬声器，第一动态压限器40可以将得到的反相环境噪声信号的幅度进行压缩将其限制在一个范围内，而在第一主动降噪滤波器得到的反相环境噪声信号很小的时候第一动态压限器40是不会起作用的，只有当第一主动降噪滤波器得到的反相环境噪声信号的功率超过了预设的第一动态压限器40门限的时候第一动态压限器40才会工作。
本实施例中，降噪电路包括的第一主动降噪滤波器能够对环境噪声信号进行反相处理，得到反相环境噪声信号，进而可以通过第一动态压限器，将得到的反相环境噪声信号的幅度压缩至预设的第一幅度范围内，得到环境噪声信号对应的消噪信号，从而能够确保将扬声器播放的环境噪声信号对应的消噪信号的幅度限制在扬声器播放的安全范围内。
如前述场景描述中，以音频播放设备为混合式耳机为例，采集电路采集到的噪声信号还包括残余噪声信号。在一个实施例中，请继续参见图6，上述采集电路还包括第二采集电路，第二采集电路，用于采集残余噪声信号；降噪电路，用于对环境噪声信号和残余噪声信号进行降噪处理，得到消噪信号。
在本实施例中，采集电路包括的第二采集电路用于采集残余噪声信号，降噪电路用于对上述环境噪声信号和该残余噪声信号进行降噪处理，得到消噪信号。可选的，降噪电路可以分别对环境噪声信号和残余噪声信号进行降噪处理，例如，对环境噪声信号进行反相处理，得到与环境噪声信号的相位相反的消噪信号，对残余噪声信号进行反相处理，得到与残余噪声信号的相位相反的消噪信号。
本实施例中，采集电路包括的第二采集电路能够采集残余噪声信号，降噪电路能够对采集的环境噪声信号和残余噪声信号进行降噪处理得到消噪信号，通过该消噪信号既能够抵消外界的环境噪声信号，又可以抵消耳道内的残余噪声信号，进一步降低了音频播放设备的底噪。
在上述降噪电路对环境噪声信号和残余噪声信号进行降噪处理，得到上述消噪信号的场景中，降噪电路还包括第二主动降噪滤波器和第二动态压限器。在一个实施例中，请继续参见图6，上述降噪电路还包括第二主动降噪滤波器50和第二动态压限器60；第二主动降噪滤波器50，用于对残余噪声信号进行反相处理，得到反相残余噪声信号；第二动态压限器60，用于将反相残余噪声信号的幅度压缩至预设的第二幅度范围内，得到残余噪声信号对应的消噪信号。
在本实施例中，上述降噪电路还包括第二主动降噪滤波器50和第二动态压限器60，其中，第二主 动降噪滤波器50根据第二采集电路采集的残余噪声信号，产生与该残余噪声信号相同相位相反的反相残余噪声信号；第二动态压限器60将第二主动降噪滤波器得到的反相残余噪声信号的幅度压缩至预设的第二幅度范围内，得到该残余噪声信号对应的消噪信号。需要说明的是，当第二主动降噪滤波器50得到的反相残余噪声信号不是很大的时候，音频播放设备会按照原来的设定输出，但是当第二主动降噪滤波器50得到的反相残余噪声信号过大的时候，为了保护扬声器，第二动态压限器60可以将得到的反相残余噪声信号的幅度进行压缩将其限制在一个范围内，而在第二主动降噪滤波器50得到的反相残余噪声信号很小的时候第二动态压限器60是不会起作用的，只有当第二主动降噪滤波器50得到的反相环境噪声信号的功率超过了预设的第二动态压限器60门限的时候第二动态压限器60才会工作。
本实施例中，降噪电路包括的第二主动降噪滤波器能够对残余噪声信号进行反相处理，得到反相残余噪声信号，进而可以通过第二动态压限器，将得到的反相残余噪声信号的幅度压缩至预设的第一幅度范围内，得到残余噪声信号对应的消噪信号，从而能够确保将扬声器播放的残余噪声信号对应的消噪信号的幅度限制在扬声器播放的安全范围内。
在大多数场景中，音频播放设备需要播放音频信号，若音频播放设备存在待播放音频信号，音频播放设备还可以将待播放音频信号和得到的消噪信号进行融合得到融合音频信号，通过低频输出电路播放融合音频信号中的低频部分。在一个实施例中，如图7所示，上述音频播放设备还包括音频获取电路和融合电路；音频获取电路，用于获取待播放音频信号；融合电路，用于将待播放音频信号与消噪信号进行融合，得到融合音频信号；低频输出电路，用于通过第一扬声器10播放融合音频信号中的低频部分。
在本实施例中，通过音频播放设备的音频获取电路获取待播放音频信号，音频播放设备的融合电路将待播放音频信号与上述消噪信号进行融合，得到融合音频信号，低频输出电路通过第一扬声器10播放融合音频信号中的低频部分。可选的，待播放音频信号也可以是预先存储在音频播放设备的存储器中的，还可以是从其他外部音频设备中获取的，例如，外部音频设备可以是音箱、手机、电视、电脑、声卡等。可选的，待播放音频信号可以为音乐信号，也可以为语音信号，也可以为其它音频信号等，本实施例并不以此为限。可选的，融合电路可以对获取的待播放音频信号和上述消噪信号进行叠加，得到融合音频信号。可选的，低频输出电路可以通过上述第一滤波器对融合音频信号进行滤波得到融合音频信号中的低频部分，再通过第二扬声器播放融合音频信号中的低频部分。可选的，音频播放设备也可以利用上述第一扬声器的器件特性播放融合音频信号中的低频部分，其中，第一扬声器的器件特性使得第一扬声器满足预设的低频输出条件，可选的，预设的低频输出条件包括第一扬声器的输出信号的频段位于预设的低频段范围内，且第一扬声器的输出信号具有低频幅度高且中频幅度平缓的特性，可选的，低频输出条件还包括第一扬声器的输出信号的声压变化量小于预设阈值；可选的，第一扬声器的器件特性包括第一扬声器的喇叭声孔调音网的声阻特性和/或振膜材料的阻尼特性。需要说明的是，关于第一扬声器满足的预设的低频输出条件的详细介绍以及第一扬声器的器件特性的详细介绍请参见上述实施例的描述，本实施例在此不再赘述。
本实施例中，若音频播放设备存在待播放音频信号，音频播放设备的音频获取电路能够获取待播放音频信号，融合电路能够将待播放音频信号与得到的消噪信号进行融合，得到融合音频信号，低频输出电路能够播放融合音频信号中的低频部分，这样，在对噪声信号进行降噪的同时兼顾了播放的音频信号的音质，确保了高品质音频信号的播放。
在上述音频播放设备存在待播放音频信号的场景中，采集耳道内的残余噪声信号的同时，也会采集到音频播放设备播放的音频信号，而采集到的音频播放设备播放的音频信号也会成为噪声，因此，需要对该部分噪声进行降噪。在一个实施例中，请继续参见图7，上述音频播放设备还包括补偿电路；上述采集电路还用于采集耳道内音频信号；补偿电路，用于从上述音频获取电路获取待播放音频信号，并将待播放音频信号传输至降噪电路；降噪电路，还用于对耳道内音频信号进行反相处理，得到反相音频信号，并将待播放音频信号与反相音频信号叠加处理，以消除采集到的耳道内音频信号。
可选的，在本实施例中，采集电路可以是音频播放设备中靠近耳道的麦克风。可选的，耳道内的音频信号可以是音乐信号，也可以是语音信号等，本实施例在此并不以此为限。其中，耳道内音频信号的反相音频信号是指与采集到的耳道内音频信号相位相反的信号。在本实施例中，降噪电路可以将采集到的耳道内音频信号进行反相，得到反相音频信号。可选的，降噪电路可以通过主动降噪滤波器对采集到 的耳道内音频信号进行反相处理，得到反相音频信号，也可以根据上述耳道内音频信号的频率、幅度变化等特性，生成上述反相音频信号。补偿电路从上述音频获取电路获取待播放音频信号，并将待播放音频信号传输至降噪电路，降噪电路可以将待播放音频信号与反相音频信号叠加处理，以消除采集到的耳道内音频信号。可以理解的是，上述反相音频信号是与待播放音频信号的相位相反的音频信号，因此，通过将待播放音频信号与反相音频信号进行叠加处理，即可以将采集到的耳道内音频信号进行消除。
本实施例中，音频播放设备的采集电路能够采集耳道内音频信号，补偿电路能够从音频获取电路获取待播放音频信号，并将待播放音频信号传输至降噪电路，降噪电路能够对采集到的耳道内音频信号进行反相处理，得到反相音频信号，并通过将待播放音频信号与该反相音频信号进行叠加处理以消除采集到的耳道内音频信号，从而确保播放的音频信号的音质。
在上述通过低频输出电路播放融合音频信号中的低频部分的场景中，为了保证音频信号的完整，还可以对待播放音频信号中的高频部分进行播放。在上述实施例的基础上，在一个实施例中，如图8所示，上述音频播放设备还包括：高频输出电路，高频输出电路包括第二扬声器70，高频输出电路，用于通过第二扬声器70播放待播放音频信号中的高频部分。
在本实施例中，音频播放设备还包括播放待播放音频信号中的高频部分的高频输出电路，高频输出电路包括第二扬声器70。通常，可以将信号频率在6KHz-20KHz之间的信号称为高频信号，本实施例中，高频输出电路通过第二扬声器70播放待播放音频信号中的高频部分，可以是待播放音频信号中的信号频率在6KHz-20KHz之间的部分。需要说明的是，将信号频率在6KHz-20KHz之间的信号称为高频信号是对本实施例中播放的待播放音频信号中的高频部分的信号进行举例说明，本申请实施例中对高频信号的划分并不以此为限。
可选的，高频输出电路播放待播放音频信号中的高频部分，可以通过高频输出电路包括的高音扬声器播放待播放音频信号中的高频部分，也可以通过高频输出电路对待播放音频信号进行滤波得到待播放音频信号中的高频部分，再播放待播放音频信号中的高频部分，下边将分别对这两种情况进行详细说明：
第一种情况，上述高频输出电路用于利用第二扬声器70的器件特性播放待播放音频信号中的高频部分，第二扬声器70的器件特性使得第二扬声器70满足预设的高频输出条件。
可选的，上述高频输出条件包括第二扬声器70的输出信号的频段位于预设的高频段范围内，通常，将信号频率在6KHz-20KHz之间的信号称为高频信号。可选的，第二扬声器70的器件特性包括振膜材料的类型、振膜材料的杨氏模量、振膜材料的阻尼特性、扬声器振动系统的质量、扬声器的线圈尺寸中的至少一个，以耳机为例，可以通过调整耳机的第二扬声器的振膜材料的类型使其满足上述高频输出条件，从而让第二扬声器播放待播放音频信号中的高频信号；或者，也可以通过调整耳机的第二扬声器的振膜材料的杨氏模量使其满足上述高频输出条件，从而让第二扬声器播放待播放音频信号中的高频信号；或者，也可以通过调整耳机的第二扬声器的振膜材料的阻尼特性使其满足上述高频输出条件，从而让第二扬声器播放待播放音频信号中的高频信号；或者，也可以通过调整耳机的第二扬声器振动系统的质量使其满足上述高频输出条件，从而让第二扬声器播放待播放音频信号中的高频信号；或者，也可以通过调整耳机的第二扬声器的线圈尺寸使其满足上述高频输出条件，从而让第二扬声器播放待播放音频信号中的高频信号，或者，还可以调整耳机的第二扬声器的其他器件特性，本申请实施例中不加以限制。
可选的，第二扬声器70的输出信号的声压高于第一扬声器10的输出信号的声压，也就是说，大气压受到第二扬声器70的输出信号扰动后产生的变化大于大气压受到第一扬声器的输出信号扰动后产生的变化。可选的，第二扬声器70可以是高音扬声器。可选的，该第二扬声器70可以为电动式扬声器、静电式扬声器、电磁式扬声器、压电式扬声器中的任一种。
第二种情况：上述高频输出电路还包括第二滤波器，第二滤波器对待播放音频信号进行滤波得到待播放音频信号中的高频部分。
在本实施例中，高频输出电路先通过第二滤波器对待播放音频信号进行滤波得到待播放音频信号中的高频部分，再通过高频输出电路的第二扬声器播放待播放音频信号中的高频部分。可选的，音频播放设备对待播放音频信号进行滤波得到的待播放音频信号中的高频部分可以是待播放音频信号中频率为6KHz-20KHz间的信号。
本实施例中，音频播放设备包括的高频输出电路能够播放待播放音频信号中的高频部分，通过将待 播放音频信号的低频部分与待播放音频信号的高频部分分开播放，使得音频播放设备播放的待播放音频信号中的高频部分不会存在非降噪频段的高频信号的噪声，从而保证了播放的待播放音频信号的音质；另外，通过音频播放设备的第二扬声器播放待播放音频信号中的高频部分，保证了待播放音频信号的完整性。
在上述音频播放设备内存在待播放音频信号的场景中，还可以对待播放音频信号的增益值进行调节，在一个实施例中，请继续参见8，上述音频播放设备还包括均衡器80，均衡器80用于对待播放音频信号进行增益调节。
在本实施例中，音频播放设备还包括均衡器80，均衡器80可以在播放待播放音频信号之前，还可以对待播放音频信号的增益进行调节。可以理解的是，通过对待播放音频信号的增益进行调节，能够通过对各种不同频率的电信号的调节来提高待播放音频信号的播放音质。
在一个实施例中，如图9所示，提供了一种音频播放装置，包括：获取模块、降噪模块和播放模块，其中：
第一获取模块，用于获取噪声信号。
降噪模块，用于对噪声信号进行降噪处理，得到消噪信号。
第一播放模块，用于通过第一扬声器播放消噪信号中的低频部分。
本实施例提供的音频播放装置，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再赘述。
在上述实施例的基础上，可选的，上述第一播放模块，包括第一播放单元，其中：
第一播放单元，用于对消噪信号进行滤波得到消噪信号中的低频部分，通过第一扬声器播放消噪信号中的低频部分；或
利用第一扬声器的器件特性播放消噪信号中的低频部分，第一扬声器的器件特性使得第一扬声器满足预设的低频输出条件。
可选的，低频输出条件包括第一扬声器的输出信号的频段位于预设的低频段范围内，且第一扬声器的输出信号具有低频幅度高且中频幅度平缓的特性。
可选的，低频输出条件还包括第一扬声器的输出信号的声压变化量小于预设阈值。
可选的，第一扬声器的器件特性包括第一扬声器的喇叭声孔调音网的声阻特性和/或振膜材料的阻尼特性。
本实施例提供的音频播放装置，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再赘述。
在上述实施例的基础上，可选的，噪声信号包括环境噪声信号，上述降噪模块，包括：降噪单元，其中：
降噪单元，用于对环境噪声信号进行降噪处理，得到消噪信号。
本实施例提供的音频播放装置，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再赘述。
在上述实施例的基础上，可选的，上述噪声信号还包括残余噪声信号，上述降噪单元，用于对环境噪声信号和残余噪声信号进行降噪处理，得到消噪信号。
本实施例提供的音频播放装置，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再赘述。
在上述实施例的基础上，可选的，上述装置还包括：第二获取模块、融合模块和第二播放模块，其中：
第二获取模块，用于获取待播放音频信号。
融合模块，用于将待播放音频信号与消噪信号进行融合，得到融合音频信号。
第二播放模块，用于通过第一扬声器播放融合音频信号中的低频部分。
本实施例提供的音频播放装置，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再赘述。
本实施例提供的音频播放装置，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再 赘述。
在上述实施例的基础上，可选的，上述装置还包括：调节模块，其中：
调节模块，用于对待播放音频信号进行增益调节。
本实施例提供的音频播放装置，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再赘述。
在上述实施例的基础上，可选的，上述装置还包括：第三播放模块，其中：
第三播放模块，用于通过第二扬声器播放待播放音频信号中的高频部分。
本实施例提供的音频播放装置，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再赘述。
在上述实施例的基础上，可选的，上述第三播放模块，包括：第二播放单元，其中：
第二播放单元，用于对待播放音频信号进行滤波得到待播放音频信号中的高频部分，通过第二扬声器播放待播放音频信号中的高频部分；或
利用第二扬声器的器件特性播放待播放音频信号中的高频部分，第二扬声器的器件特性使得第二扬声器满足预设的高频输出条件。
可选的，高频输出条件包括第二扬声器的输出信号的频段位于预设的高频段范围内。
可选的，第二扬声器的器件特性包括振膜材料的类型、振膜材料的杨氏模量、振膜材料的阻尼特性、扬声器振动系统的质量、扬声器的线圈尺寸中的至少一个。
可选的，第二扬声器的输出信号的声压高于第一扬声器的输出信号的声压。
本实施例提供的音频播放装置，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再赘述。
关于音频播放装置的具体限定可以参见上文中对于音频播放方法的限定，在此不再赘述。上述音频播放装置中的各个模块可全部或部分通过软件、硬件及其组合来实现。上述各模块可以硬件形式内嵌于或独立于计算机设备中的处理器中，也可以以软件形式存储于计算机设备中的存储器中，以便于处理器调用执行以上各个模块对应的操作。
在一个实施例中，提供了一种音频播放设备，包括存储器和处理器，存储器中存储有计算机程序，该处理器执行计算机程序时实现以下步骤：
获取噪声信号；
对噪声信号进行降噪处理，得到消噪信号；
通过第一扬声器播放消噪信号中的低频部分。
在一个实施例中，提供了一种计算机可读存储介质，其上存储有计算机程序，计算机程序被处理器执行时实现以下步骤：
获取噪声信号；
对噪声信号进行降噪处理，得到消噪信号；
通过第一扬声器播放消噪信号中的低频部分。
以上实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (34)

  1. 一种音频播放方法，其特征在于，所述方法包括：
    获取噪声信号；
    对所述噪声信号进行降噪处理，得到消噪信号；
    通过第一扬声器播放所述消噪信号中的低频部分。
  2. 根据权利要求1所述的方法，其特征在于，所述通过第一扬声器播放所述消噪信号中的低频部分包括：
    对所述消噪信号进行滤波得到所述消噪信号中的低频部分，通过所述第一扬声器播放所述消噪信号中的所述低频部分；或
    利用所述第一扬声器的器件特性播放所述消噪信号中的所述低频部分，所述第一扬声器的器件特性使得所述第一扬声器满足预设的低频输出条件。
  3. 根据权利要求2所述的方法，其特征在于，所述低频输出条件包括所述第一扬声器的输出信号的频段位于预设的低频段范围内，且所述第一扬声器的输出信号具有低频幅度高且中频幅度平缓的特性。
  4. 根据权利要求3所述的方法，其特征在于，所述低频输出条件还包括所述第一扬声器的输出信号的声压变化量小于预设阈值。
  5. 根据权利要求2-4任一项所述的方法，其特征在于，所述第一扬声器的器件特性包括所述第一扬声器的喇叭声孔调音网的声阻特性和/或振膜材料的阻尼特性。
  6. 根据权利要求1-4任一项所述的方法，其特征在于，所述噪声信号包括环境噪声信号，所述对所述噪声信号进行降噪处理，得到消噪信号，包括：
    对所述环境噪声信号进行降噪处理，得到所述消噪信号。
  7. 根据权利要求6所述的方法，其特征在于，所述噪声信号还包括残余噪声信号，所述对所述噪声信号进行降噪处理，得到消噪信号，包括：
    对所述环境噪声信号和所述残余噪声信号进行降噪处理，得到所述消噪信号。
  8. 根据权利要求1-4任一项所述的方法，其特征在于，若存在待播放音频信号，所述方法还包括：
    获取待播放音频信号；
    将所述待播放音频信号与所述消噪信号进行融合，得到融合音频信号；
    通过所述第一扬声器播放所述融合音频信号中的低频部分。
  9. 根据权利要求8所述的方法，其特征在于，所述方法还包括：
    对所述待播放音频信号进行增益调节。
  10. 根据权利要求8所述的方法，其特征在于，所述方法还包括：
    通过第二扬声器播放所述待播放音频信号中的高频部分。
  11. 根据权利要求10所述的方法，其特征在于，所述通过第二扬声器播放所述待播放音频信号中的高频部分，包括：
    对所述待播放音频信号进行滤波得到所述待播放音频信号中的高频部分，通过所述第二扬声器播放所述待播放音频信号中的高频部分；或
    利用所述第二扬声器的器件特性播放所述待播放音频信号中的高频部分，所述第二扬声器的器件特性使得所述第二扬声器满足预设的高频输出条件。
  12. 根据权利要求11所述的方法，其特征在于，所述高频输出条件包括所述第二扬声器的输出信号的频段位于预设的高频段范围内。
  13. 根据权利要求11所述的方法，其特征在于，所述第二扬声器的器件特性包括振膜材料的类型、振膜材料的杨氏模量、振膜材料的阻尼特性、扬声器振动系统的质量、扬声器的线圈尺寸中的至少一个。
  14. 根据权利要求10所述的方法，其特征在于，所述第二扬声器的输出信号的声压高于所述第一扬声器的输出信号的声压。
  15. 一种音频播放设备，其特征在于，所述音频播放设备包括：采集电路、降噪电路和低频输出电路，所述低频输出电路包括第一扬声器，其中，
    所述采集电路，用于采集噪声信号；
    所述降噪电路，用于对所述噪声信号进行降噪处理，得到消噪信号；
    所述低频输出电路，用于通过所述第一扬声器播放所述消噪信号中的低频部分。
  16. 根据权利要求15所述的音频播放设备，其特征在于，所述低频输出电路，用于利用所述第一扬声器的器件特性播放所述消噪信号中的所述低频部分，所述第一扬声器的器件特性使得所述第一扬声器满足预设的低频输出条件。
  17. 根据权利要求16所述的音频播放设备，其特征在于，所述低频输出条件包括所述第一扬声器的输出信号的频段位于预设的低频段范围内，且所述第一扬声器的输出信号具有低频幅度高且中频幅度平缓的特性。
  18. 根据权利要求17所述的音频播放设备，其特征在于，所述低频输出条件还包括所述第一扬声器的输出信号的声压变化量小于预设阈值。
  19. 根据权利要求16-18任一项所述的音频播放设备，其特征在于，所述第一扬声器的器件特性包括所述第一扬声器的喇叭声孔调音网的声阻特性和/或振膜材料的阻尼特性。
  20. 根据权利要求15所述的音频播放设备，其特征在于，所述低频输出电路还包括：第一滤波器；
    所述第一滤波器，用于对所述消噪信号进行滤波得到所述消噪信号中的低频部分。
  21. 根据权利要求15-18任一项所述的音频播放设备，其特征在于，所述采集电路包括第一采集电路；
    所述第一采集电路，用于采集环境噪声信号；
    所述降噪电路，用于对所述环境噪声信号进行降噪处理，得到所述消噪信号。
  22. 根据权利要求21所述的音频播放设备，其特征在于，所述降噪电路包括第一主动降噪滤波器和第一动态压限器；
    所述第一主动降噪滤波器，用于对所述环境噪声信号进行反相处理，得到反相环境噪声信号；
    所述第一动态压限器，用于将所述反相环境噪声信号的幅度压缩至预设的第一幅度范围内，得到所述环境噪声信号对应的消噪信号。
  23. 根据权利要求22所述的音频播放设备，其特征在于，所述采集电路还包括第二采集电路；
    所述第二采集电路，用于采集残余噪声信号；
    所述降噪电路，用于对所述环境噪声信号和所述残余噪声信号进行降噪处理，得到所述消噪信号。
  24. 根据权利要求23所述的方法，其特征在于，所述降噪电路还包括：第二主动降噪滤波器和第二动态压限器；
    所述第二主动降噪滤波器，用于对所述残余噪声信号进行反相处理，得到反相残余噪声信号；
    所述第二动态压限器，用于将所述反相残余噪声信号的幅度压缩至预设的第二幅度范围内，得到所述残余噪声信号对应的消噪信号。
  25. 根据权利要求15-18任一项所述的音频播放设备，其特征在于，所述音频播放设备还包括音频获取电路和融合电路；
    所述音频获取电路，用于获取待播放音频信号；
    所述融合电路，用于将所述待播放音频信号与所述消噪信号进行融合，得到融合音频信号；
    所述低频输出电路，还用于通过所述第一扬声器播放所述融合音频信号中的低频部分。
  26. 根据权利要求25所述的音频播放设备，其特征在于，所述音频获取电路包括接收器；
    所述接收器，用于接收外部音频设备发送的所述待播放音频信号。
  27. 根据权利要求25所述的音频播放设备，其特征在于，所述音频播放设备还包括补偿电路；
    所述采集电路，还用于采集耳道内音频信号；
    所述补偿电路，用于从所述音频获取电路获取所述待播放音频信号，并将所述待播放音频信号传输至所述降噪电路；
    所述降噪电路，还用于对所述耳道内音频信号进行反相处理，得到反相音频信号，并将所述待播放音频信号与所述反相音频信号叠加处理，以消除采集到的所述耳道内音频信号。
  28. 根据权利要求25所述的音频播放设备，其特征在于，所述音频播放设备还包括高频输出电路，所述高频输出电路包括第二扬声器；
    所述高频输出电路，用于通过所述第二扬声器播放所述待播放音频信号中的高频部分。
  29. 根据权利要求28所述的音频播放设备，其特征在于，所述高频输出电路，用于利用所述第二扬声器的器件特性播放所述待播放音频信号中的高频部分，所述第二扬声器的器件特性使得所述第二扬声器满足预设的高频输出条件。
  30. 根据权利要求29所述的音频播放设备，其特征在于，所述高音频输出条件包括所述第二扬声器的输出信号的频段位于预设的高频段范围内。
  31. 根据权利要求29所述的音频播放设备，其特征在于，所述第二扬声器的器件特性包括振膜材料的类型、振膜材料的杨氏模量、振膜材料的阻尼特性、扬声器振动系统的质量、扬声器的线圈尺寸中的至少一个。
  32. 根据权利要求29所述的音频播放设备，其特征在于，所述第二扬声器的输出信号的声压高于所述第一扬声器的输出信号的声压。
  33. 根据权利要求根据权利要求28所述的音频播放设备，其特征在于，所述高频输出电路还包括： 第二滤波器；
    所述第二滤波器，用于对所述待播放音频信号进行滤波得到所述待播放音频信号中的高频部分。
  34. 根据权利要求25所述的音频播放设备，其特征在于，所述音频播放设备还包括均衡器，
    所述均衡器，用于对所述待播放音频信号进行增益调节。
PCT/CN2022/083707 2021-04-29 2022-03-29 音频播放方法和音频播放设备 Ceased WO2022227992A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US18/496,836 US12614538B2 (en) 2021-04-29 2023-10-27 Audio playback method, audio playback device, and storage medium

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110475260.4A CN115278424A (zh) 2021-04-29 2021-04-29 音频播放方法和音频播放设备
CN202110475260.4 2021-04-29

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/496,836 Continuation US12614538B2 (en) 2021-04-29 2023-10-27 Audio playback method, audio playback device, and storage medium

Publications (1)

Publication Number Publication Date
WO2022227992A1 true WO2022227992A1 (zh) 2022-11-03

Family

ID=83745867

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/083707 Ceased WO2022227992A1 (zh) 2021-04-29 2022-03-29 音频播放方法和音频播放设备

Country Status (3)

Country Link
US (1) US12614538B2 (zh)
CN (1) CN115278424A (zh)
WO (1) WO2022227992A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12614538B2 (en) 2021-04-29 2026-04-28 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Audio playback method, audio playback device, and storage medium

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4953217A (en) * 1987-07-20 1990-08-28 Plessey Overseas Limited Noise reduction system
JP2002055684A (ja) * 2000-08-07 2002-02-20 Fuji Xerox Co Ltd フィードバック型能動騒音制御装置
CN101001481A (zh) * 2006-01-14 2007-07-18 三星电子株式会社 降低耳机噪声装置和方法、降噪耳机和便携音频再现装置
TW200828264A (en) * 2006-12-29 2008-07-01 Ind Tech Res Inst Noise canceling device and method thereof
CN110099323A (zh) * 2019-05-23 2019-08-06 歌尔科技有限公司 一种主动降噪耳机
CN111134956A (zh) * 2019-12-24 2020-05-12 杭州鐵三角科技有限公司 一种降噪耳塞

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4496021A (en) * 1983-02-18 1985-01-29 Emmanuel Berlant 360 Degree radial reflex orthospectral horn for high-frequency loudspeakers
US9174176B2 (en) * 2003-01-09 2015-11-03 Disperse Systems, Inc. Ultrasonic dispersion apparatus, system, and method
US9414150B2 (en) * 2013-03-14 2016-08-09 Cirrus Logic, Inc. Low-latency multi-driver adaptive noise canceling (ANC) system for a personal audio device
US9516416B2 (en) * 2015-04-27 2016-12-06 Lab9 Inc. Multi-loudspeaker active noise cancelling headphone providing stereo effct and improved ambient noise reduction
US20160330546A1 (en) * 2015-05-06 2016-11-10 Aliphcom Headset with leakage detection
US9497530B1 (en) * 2015-08-31 2016-11-15 Nura Holdings Pty Ltd Personalization of auditory stimulus
CN107071654A (zh) * 2017-05-24 2017-08-18 歌尔科技有限公司 一种数字降噪方法、装置和一种音频播放设备
US10410654B2 (en) * 2017-10-27 2019-09-10 Bestechnic (Shanghai) Co., Ltd. Active noise control headphones
CN107750027A (zh) 2017-11-30 2018-03-02 会听声学科技（北京）有限公司 场景自适应主动降噪耳机及场景自适应主动降噪设计方法
GB201916033D0 (en) * 2019-11-04 2019-12-18 Soundchip Sa Active noise cancelling system
CN110996215B (zh) * 2020-02-26 2020-06-02 恒玄科技(北京)有限公司 确定耳机降噪参数的方法、装置以及计算机可读介质
CN115278424A (zh) 2021-04-29 2022-11-01 Oppo广东移动通信有限公司 音频播放方法和音频播放设备

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4953217A (en) * 1987-07-20 1990-08-28 Plessey Overseas Limited Noise reduction system
JP2002055684A (ja) * 2000-08-07 2002-02-20 Fuji Xerox Co Ltd フィードバック型能動騒音制御装置
CN101001481A (zh) * 2006-01-14 2007-07-18 三星电子株式会社 降低耳机噪声装置和方法、降噪耳机和便携音频再现装置
TW200828264A (en) * 2006-12-29 2008-07-01 Ind Tech Res Inst Noise canceling device and method thereof
CN110099323A (zh) * 2019-05-23 2019-08-06 歌尔科技有限公司 一种主动降噪耳机
CN111134956A (zh) * 2019-12-24 2020-05-12 杭州鐵三角科技有限公司 一种降噪耳塞

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12614538B2 (en) 2021-04-29 2026-04-28 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Audio playback method, audio playback device, and storage medium

Also Published As

Publication number Publication date
CN115278424A (zh) 2022-11-01
US12614538B2 (en) 2026-04-28
US20240127786A1 (en) 2024-04-18

Similar Documents

Publication Publication Date Title
CN113068091B (zh) 噪声消除来自触觉振动驱动器的声学噪声的耳机
JP6069830B2 (ja) 耳孔装着型収音装置、信号処理装置、収音方法
CN102947685B (zh) 用于减少环境噪声对收听者的影响的方法和装置
KR101482488B1 (ko) 개선된 오디오를 위한 통합된 심리음향 베이스 강화 (ｐｂｅ)
US7177433B2 (en) Method of improving the audibility of sound from a loudspeaker located close to an ear
JP6069829B2 (ja) 耳孔装着型収音装置、信号処理装置、収音方法
JP6315046B2 (ja) 耳孔装着型収音装置、信号処理装置、収音方法
KR102943103B1 (ko) 능동 노이즈 제거 기능을 가진 헤드셋 및 능동 노이즈 제거 방법
US9779718B2 (en) Control circuit for active noise control and method for active noise control
WO2022227982A1 (zh) Tws耳机和tws耳机的播放方法及装置
US10097929B2 (en) Sound signal amplitude suppressing apparatus
US12293754B2 (en) Active noise control method and system for headphone
JP6197930B2 (ja) 耳孔装着型収音装置、信号処理装置、収音方法
CN111656436B (zh) 噪声消除滤波器结构、噪声消除系统及信号处理方法
GB2455823A (en) Active noise cancellation filter cut-off frequency adjusted in accordance with magnitude of filter output signal
US12614538B2 (en) Audio playback method, audio playback device, and storage medium
CN102044252B (zh) 消噪装置及方法
TWI549525B (zh) With three-dimensional effect and to enhance the noise reduction of the environment noise loudspeakers active noise reduction headphones
US20250088787A1 (en) In-ear wearable with high latency band limiting
WO2024216532A1 (zh) 滤波方法、滤波装置、芯片和耳机
CN114501235A (zh) 一种提升音响音质的方法、存储介质及音响

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22794465

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22794465

Country of ref document: EP

Kind code of ref document: A1