CN111556391A - Noise reduction earphone, electronic device and noise reduction method - Google Patents
Noise reduction earphone, electronic device and noise reduction method Download PDFInfo
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- CN111556391A CN111556391A CN202010288960.8A CN202010288960A CN111556391A CN 111556391 A CN111556391 A CN 111556391A CN 202010288960 A CN202010288960 A CN 202010288960A CN 111556391 A CN111556391 A CN 111556391A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1016—Earpieces of the intra-aural type
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1083—Reduction of ambient noise
Abstract
The invention discloses a noise reduction earphone, electronic equipment and a noise reduction method. The noise reduction earphone comprises an earphone body, wherein the earphone body comprises an ear inlet part plugged into the ear of a user when the noise reduction earphone is worn and a rear end part facing the external environment when the noise reduction earphone is worn; a first microphone at the rear end, the first microphone facing in a first direction; a second microphone positioned at a first location of the ear-entry portion, the second microphone facing in a second direction; the first microphone and the second microphone are respectively and electrically connected with the control chip; a first speaker at a second location of the ear-in portion, the first speaker coupled to the first microphone; a second speaker located at a third location of the ear, the second speaker connected to the second microphone.
Description
Technical Field
The present invention relates to the field of electronic devices, and in particular, to a noise reduction earphone, an electronic device, and a noise reduction method.
Background
The use of earphones for listening to songs has become a trend and trend, but in some public places with more people and traffic flows, such as public transport stations like buses, subways and airports, or places like commercial streets, larger noise often exists, and because the sealing effect of some earphones is not good, for example, half-in-ear earphones are used, larger background noise often enters ears while listening to songs, so that the effect of listening to songs is influenced.
However, most of the existing earphones do not support noise reduction and can be realized only by specific equipment, which causes certain inconvenience.
Disclosure of Invention
The invention provides a noise reduction earphone, an electronic device and a noise reduction method, which can solve the technical problem that the earphone does not support noise reduction in the prior art.
To solve the above technical problem, according to a first aspect of the present invention, a noise reduction headphone is provided. The noise reducing headphone includes:
the earphone body comprises an ear-entering part which is plugged into the ear of a user when the earphone body is worn and a rear end part which faces the external environment when the earphone body is worn;
a first microphone at the rear end, the first microphone facing in a first direction;
a second microphone positioned at a first location of the ear-entry portion, the second microphone facing in a second direction;
the first microphone and the second microphone are respectively and electrically connected with the control chip;
a first speaker at a second location of the ear-in portion, the first speaker coupled to the first microphone;
a second speaker located at a third location of the ear, the second speaker connected to the second microphone.
According to a second aspect of the invention, a method of noise reduction is provided. The method comprises the following steps:
acquiring an external environment noise signal;
generating a first audio signal in phase opposition to the ambient noise signal based on the ambient noise signal;
acquiring a second signal, wherein the second signal comprises a noise signal obtained by processing an external environment noise signal through the first audio signal;
separating the noise signal and a predetermined signal from the second signal, and generating a second audio signal having a phase opposite to that of the noise signal based on the noise signal;
superposing the second audio signal and the preset signal to generate a target audio signal;
and sending the target audio signal to the noise reduction earphone for playing.
According to a third aspect of the invention, an electronic device is provided. The electronic equipment comprises the noise reduction earphone.
In the embodiment of the invention, two microphones and two loudspeakers are arranged in the noise reduction earphone; before noise in the external environment gets into the duct, utilize first microphone and first speaker to initiatively fall and make an uproar, reduce the sound pressure level that external environment's noise was inputed into the duct in advance, reduce the noise that gets into in the duct, fall for the initiative of second microphone and second speaker and make an uproar and provide better condition to improve the effect that the earphone was fallen and is made an uproar.
Drawings
Fig. 1 is a sectional view showing the structure of a noise reduction headphone according to the present invention.
Fig. 2 is a flow chart of the noise reduction method according to the present invention.
Fig. 3 is a schematic diagram illustrating the internal connection of the noise reduction earphone according to the present invention.
Reference numerals:
101-a headset body; 102-a first microphone; 103-a second microphone; 104-a first speaker; 105-a second speaker; 106-ear canal.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to one embodiment of the present disclosure, a noise reducing headphone is provided. Referring to fig. 1 and 3, the noise reduction headphone includes:
the earphone comprises an earphone body 101, wherein the earphone body 101 comprises an ear-entering part 01 which is inserted into the ear of a user when being worn and a rear end part 02 which faces the external environment when being worn; wherein the structure of the ear inlet 01 is adapted to the structure of the ear canal of the user. The cross-sectional view of the noise reduction earphone in fig. 1 only shows the core structure of the earphone, and the actual earphone shape and the layout of each device can be adjusted according to the actual situation, for example, the actual earphone design can be optimized by referring to human engineering.
A first microphone 102, the first microphone 102 being located at the rear end 02 of the earphone body, the first microphone 102 facing a first direction; when the user wears the noise reduction earphone, the first direction is towards the external environment.
A second microphone 103, wherein the second microphone 103 is located at a first position of the ear entrance part 01, and the second microphone faces a second direction; wherein when the user wears the noise reduction earphone, the second direction is towards the ear canal side wall, wherein the ear canal side wall is shown with reference to fig. 1, a and b are shown as ear canal side wall a and ear canal side wall b, respectively, and ear canal side wall a and ear canal side wall b constitute the ear canal side wall. The ear canal side wall a and the ear canal side wall b extend toward the ear canal 106 in directions to approach each other, respectively. In this example, when the user wears the noise reduction headphone, the second microphone 103 may be oriented toward the ear canal sidewall a.
When the user wears the noise reduction headphone, for example, the first microphone 102 and the second microphone 103 are oriented differently, so that the first microphone 102 and the second microphone 103 can respectively capture sound signals in different directions. The first microphone 102 and the second microphone 103 are used as input devices, and can convert sound signals collected by the input devices into electric signals, and the electric signals are received and processed by the control chip.
A control chip (not shown), to which the first microphone 102 and the second microphone 103 are electrically connected, respectively; the control chip is used for processing the electric signals converted by the first microphone 102 and the second microphone 103. For example, a microphone converts a sound signal (for example, a noise signal) collected by the microphone into an electrical signal corresponding to the sound signal, and the control chip performs phase inversion processing on the electrical signal or classifies and separates the electrical signal. For example, the sound signal acquired by the microphone comprises a noise signal and a predetermined signal, and the control chip can classify the sound signal acquired by the microphone according to the signal type and the signal component, extract the noise signal and the predetermined signal from the sound signal respectively, and process the noise signal.
Wherein the phase inversion process can be understood as: for example, the first microphone acquires a noise signal in an external environment, the first microphone converts the acquired noise signal from an analog signal into a digital signal, the first microphone transmits the digital signal to the control chip, and the control chip inverts the digital signal to obtain a first audio signal with an opposite phase to the digital signal.
A first speaker 104, wherein the first speaker 104 is located at a second position of the ear entrance part 01, and the first speaker 104 is connected to the first microphone 102;
the first speaker 104 is configured to play a first audio signal processed by the control chip, where the phase of the first audio signal is opposite to that of the noise signal collected by the first microphone, and the first audio signal and the noise signal collected by the first microphone are added and cancelled, so as to effectively reduce the intensity of the noise signal in the external environment of the ear. When the user wears when making an uproar earphone falls, first microphone and first speaker can effectively reduce the intensity of the noise signal in the external environment, and then the intensity of the noise signal after the noise entering duct in the external environment has been reduced.
A second speaker, wherein the second speaker 105 is located at a third position of the ear entrance part 01, and the second speaker 105 is connected to the second microphone 103.
The second speaker 105 is configured to play a target audio signal processed by the control chip, where the target audio signal and a noise signal collected by the second microphone have opposite phases, for example, the target audio signal and the noise signal collected by the second microphone have opposite phases, so as to reduce the intensity of the noise signal in the ear canal, where the noise signal in the ear canal includes a noise signal obtained by processing the external environment noise signal with the first audio signal.
In the embodiment, two microphones and two loudspeakers are arranged in the noise reduction earphone, and before noise in an external environment enters an ear canal, the first microphone and the first loudspeaker are used for active noise reduction, so that the sound pressure level of the noise in the external environment input into the ear canal is reduced in advance, the intensity of a noise signal in the ear canal is reduced, a better condition is provided for active noise reduction of the second microphone and the second loudspeaker, and the noise reduction effect of the earphone is improved.
Optionally, the second microphone 103 is located at a first position of the ear entrance part 01, the first speaker 104 is located at a second position of the ear entrance part 01, and the second speaker 105 is located at a third position of the ear entrance part 01, where the first position, the second position, and the third position are different positions on the ear entrance part 01;
optionally, when the second microphone 103 and the first speaker 104 are located at the first position and the second position of the ear entrance 01, respectively, the second microphone 103 and the first speaker 104 are both facing the ear canal sidewall a direction, wherein the second microphone 103 is located at a position far away from the first microphone and facing the ear canal sidewall a direction, and the first speaker 104 is located at a position close to the first microphone and facing the ear canal sidewall a direction; wherein the second speaker 105 is located at the third position of the ear entrance 01, and the second speaker 105 faces the ear canal 106 when the user wears the noise reduction earphone.
In an alternative example, referring to fig. 1, when the noise reduction earphone is worn by a user, the first microphone 102 faces the external environment; the second microphone 103 is directed towards the ear canal side wall a.
For example, the first microphone 102 has a sound collection module facing the external environment for collecting noise signals in the external environment.
For example, the second microphone 103 has a sound collection module which is oriented towards the ear canal sidewall a for collecting the second signal in the ear canal when the noise reduction earphone is worn by the user.
The sound collection modules of the first microphone 102 and the second microphone 103 in this example are oriented differently to collect sound signals in different directions; for example, the first microphone 102 faces the external environment, and is configured to collect a noise signal in the external environment, process the collected noise signal in the external environment, reduce the intensity of the noise signal in the external environment, further reduce the intensity of the noise signal entering the ear canal from the noise signal in the external environment, and provide a better condition for active noise reduction of the second microphone and the second speaker.
For example, the second microphone 103 faces the direction of the ear canal sidewall a for collecting a second signal in the ear canal, where the second signal includes a noise signal of an external environment after being processed by the first audio signal, and because the first microphone, the control chip and the first speaker process the noise signal in the external environment, the intensity of the noise signal in the external environment entering the ear canal is reduced, so that the intensity of the noise signal in the ear canal collected by the second microphone in this example is smaller than the intensity of the noise signal in the ear canal collected by the microphone in the prior art, the noise signal in the ear canal can be further attenuated in this example, and when the noise reduction earphone is a half-in-ear earphone, the noise reduction performance of the half-in-ear earphone is improved.
In an optional example, the first speaker 104 is connected to the first microphone 102 through the control chip;
the second speaker 105 is connected to the second microphone 103 through the control chip.
For example, the first microphone 102 is located at the rear end 02 of the earphone main body 101, and when the user wears the noise reduction earphone, the first microphone 102 faces the external environment to collect a noise signal in the external environment and feed the noise signal back to the control chip in the earphone. Wherein the first microphone 102 is capable of converting the collected noise signal into an electrical signal.
The control chip processes the noise signal with a certain algorithm and inputs the processed noise signal into the first speaker 104.
For example, the algorithm processing mainly includes inverting the phase of the electrical signal, and may also perform a certain adjustment on the electrical signal according to a debugging process, so that the first speaker 104 may play a first audio signal with a phase opposite to that of the noise signal in the external environment, and the first audio signal and the noise signal are superimposed and cancelled, thereby pre-canceling the noise signal in the external environment, and reducing the intensity of the noise signal in the external environment entering the ear canal.
The first speaker 104 emits sound into the ear canal 106 upon receiving the electrical signal; since the half-in-ear earphone is worn loosely, a noise signal in the external environment also directly enters the ear canal. The first audio signal emitted from the first speaker 104 will be superimposed and cancelled with the noise signal in the external environment in the ear canal, effectively reducing the intensity of the noise signal in the external environment entering the ear canal.
The second microphone 103 collects a second signal in the ear canal 106, wherein the second signal comprises a noise signal of an external environment noise signal processed by the first audio signal, and the second signal collected by the second microphone is fed back to the control chip. Wherein the noise signal in the ear canal is the noise signal in the ear canal after the noise signal in the external environment processed by the first microphone and the first loudspeaker enters the ear canal.
After the control chip receives the second signal, extracting a preset signal and a noise signal from the second signal according to the characteristics of the signal; the control chip performs phase inversion and other processing on the noise signal to obtain a second audio signal, and then the predetermined signal and the second audio signal are superimposed and input to the second speaker 105.
Wherein the predetermined signal can be understood as a useful signal desired by the user.
The control chip mixes the predetermined signal with the second audio signal and inputs the mixed signal into the second speaker 105, wherein the sound emitted by the second speaker 105 includes the predetermined signal and the inverted noise signal. In this way the noise signal in the ear canal will be further attenuated, thereby improving the noise reduction performance of the earphone.
In an alternative example, when the user wears the noise reduction earphone, the first speaker 104 faces the side wall a of the ear canal, the second speaker 105 faces the ear canal 106, and the first speaker 104 and the second speaker 105 face at a predetermined angle.
Referring to fig. 1, the first speaker 104 is located at the second position of the ear inlet 02, and the first speaker 104 faces the side wall a of the ear canal.
Wherein the second speaker is oriented in an ear canal direction, wherein the ear canal direction is defined as: the ear canal side wall a and the ear canal side wall b extend to form the ear canal 106, wherein the extending direction of the ear canal side wall a and the ear canal side wall b is the direction of the ear canal 106, and the extending direction is the direction in which the ear canal side wall a and the ear canal side wall b are close to each other.
Optionally, the predetermined angle is an acute angle, for example, when the first speaker and the second speaker are oriented at an acute angle, a crosstalk phenomenon is not generated between the first audio signal played by the first speaker and the target audio signal played by the second speaker, so that the noise reduction capability of the headset can be further improved.
Optionally, the noise reducing headphone is a half-in-ear headphone. In the prior art, a half-in-ear earphone does not have the noise reduction capability; the invention improves the semi-in-ear earphone, and improves the noise reduction capability of the semi-in-ear earphone in the prior art.
In an alternative example, the first speaker 104 is located at a second position of the ear inlet portion, wherein the second position is proximate to the rear end portion 02; when the first speaker 104 is located near the rear end 02, it can be understood that the first speaker is located at the entrance of the ear canal because the first speaker faces the side wall a of the ear canal; the first audio signal emitted from the first speaker 104 will be added and cancelled with the noise signal in the external environment at the entrance position of the ear canal, effectively reducing the intensity of the noise signal in the external environment entering the ear canal.
The second speaker 105 is located at a third position of the ear inlet portion, wherein the third position is away from the rear end portion 02; when the second speaker is located at a position far from the rear end portion 02, since the second speaker 105 faces the ear canal, the target audio signal emitted from the second speaker 105 can be heard by the user along the extending direction of the side wall of the ear canal.
According to another aspect of the present invention, a method of noise reduction is provided. The active noise reduction earphone adopts the method to reduce noise; referring to fig. 2, the method includes:
acquiring a noise signal in an external environment;
for example, when listening to a song, due to the different sealing effects of the earphones, noise in the external environment may enter the human ear at the same time, resulting in the user hearing the music transferred to the human ear while also hearing the noise in the external environment. Therefore, the noise signal in the external environment needs to be acquired and processed, and on the basis, the following operation processes of noise reduction and noise elimination are realized.
Generating a first audio signal in phase opposition to the ambient noise signal based on the ambient noise signal;
in the process, on the basis of acquiring the obtained noise signal of the external environment, the noise signal is subjected to phase transformation processing to obtain a first audio signal, the phase of the first audio signal is opposite to that of the environmental noise signal, so that after the first audio signal generated in the subsequent process is sent to the earphone, mutual offset between the first audio signal and the noise signal in the external environment is realized, the effect of reducing the noise signal intensity in the external environment is realized, and the signal intensity of the noise signal in the external environment entering the auditory canal is further reduced.
Acquiring a second signal; wherein the second signal comprises a predetermined signal and a noise signal in the ear canal, wherein the predetermined signal is defined as a sound signal desired by the user, such as a music signal, etc. when listening to a song.
Separating a noise signal from the second signal, and separating a second audio signal with a phase opposite to that of the noise signal based on the noise signal; the second audio signal and the noise signal in the ear canal have opposite phases, so that after the generated second audio signal is sent to the earphone in the subsequent process, the second audio signal and the noise signal in the ear canal are mutually offset, and the effect of further reducing the intensity of the noise signal in the ear canal is realized.
Separating a preset signal from the second signal, and superposing the second audio signal and the preset signal to generate a target audio signal;
the signal superposition process corresponds to the sound mixing process of the second audio signal and the preset signal, and the second audio signal and the preset signal are superposed and mixed and are jointly sent to the earphone. The predetermined signal may be an audio signal in playing music, video, etc., and the predetermined signal that needs to be transmitted to the ear of a person through an earphone is superimposed and mixed with a second audio signal obtained after phase adjustment to obtain a new audio signal, i.e., the target audio signal.
And sending the target audio signal to the noise reduction earphone for playing.
And sending the target audio signal obtained in the step to an earphone, wherein when the human ear listens to the target audio signal, because the phase of the second audio signal is opposite to that of the noise signal in the ear canal listened by the human ear, the vibration of the eardrum caused by the second audio signal and the noise signal in the ear canal listened by the human ear is offset, so that the noise signal in the ear canal is reduced, the noise reduction process is realized, and the reserved preset signal realizes the normal transmission process of the earphone audio. By the method for reducing the noise of the earphone, the noise reduction capability of the earphone is improved.
In a specific example, the first microphone 102 is used for acquiring an external environment noise signal; when the first microphone 102 is located at the rear end 02 of the earphone body, when the user wears the noise reduction earphone, the first microphone 102 faces the external environment, and can collect noise signals in the external environment.
The control chip is used for processing the external environment noise signal to form the first audio signal; specifically, a first microphone converts a received noise signal in an external environment into an electric signal, and the electric signal is transmitted to a control chip; the control chip performs a certain algorithm processing on the received electrical signal to obtain a first audio signal with a phase opposite to that of the noise signal in the external environment, and then inputs the first audio signal into the first speaker 104. The algorithm processing is mainly to invert the noise signal, and can also adjust the electric signal according to the debugging process.
The first speaker is configured to play the first audio signal, and the first audio signal is configured to be cancelled by superposition with the external environment noise signal. Specifically, because the first audio signal is opposite to the noise signal of the external environment that the human ear hears, eardrum vibrations that both caused are offset to the noise signal in the external environment is subducted in the realization, the process of making an uproar falls in the realization.
The second microphone 103 is configured to acquire a second signal, where the second signal includes a noise signal obtained by processing an external environment noise signal with the first audio signal; when the second microphone 103 is located at the first position of the ear, the second microphone 103 faces the edge direction of the ear canal, and can collect the second signal in the ear canal.
The control chip is used for processing the noise signal to form the second audio signal; the second audio signal and the predetermined signal are superposed and mixed to form a target audio signal; specifically, the second microphone 102 converts the received second signal into an electrical signal, the electrical signal is transmitted to the control signal, after the control chip receives the electrical signal, a noise signal may be extracted from the electrical signal according to components of the signal, the control chip performs phase inversion and other processing on the noise signal to obtain the electrical signal, and then the electrical signal subjected to the phase inversion and the music signal are superimposed and input to the second speaker. Wherein the second speaker emits a sound that will comprise a music signal and an inverted noise signal. In this way the noise signal in the human ear canal will be further attenuated, thereby improving the noise reduction performance of the semi-in-ear earphone.
The second speaker 105 is used to play the target audio signal. The second audio signal is for additive cancellation with the noise signal in the ear canal. Specifically, the second audio signal is opposite to the ear canal noise signal heard by the human ear, and the eardrum vibration caused by the second audio signal and the ear canal noise signal is offset, so that the noise signal in the ear canal is reduced, and the noise reduction process is realized.
According to another aspect of the present invention, an electronic device is provided. The electronic equipment comprises the noise reduction earphone. For example, the electronic device may be a head-mounted device, a smart phone, a tablet computer, or other electronic devices, and when the noise reduction earphone is adopted by the electronic device, the noise reduction capability of the electronic device is improved, and the functions of the electronic device are optimized.
In the above embodiments of the present invention, the difference between the embodiments is mainly described, and different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory, and further description is omitted here in view of brevity of the text.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or terminal equipment comprising the element.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A noise reducing headphone, characterized in that the noise reducing headphone comprises:
the earphone comprises an earphone body (101), wherein the earphone body (101) comprises an ear insertion part (01) which is inserted into the ear of a user when being worn and a rear end part (02) which faces the external environment when being worn;
a first microphone (102), the first microphone (102) being located at the rear end (02), the first microphone (102) being directed in a first direction;
a second microphone (103), the second microphone (103) being located at a first position of the ear inlet (01), the second microphone (103) being directed in a second direction;
the first microphone and the second microphone are respectively and electrically connected with the control chip;
a first speaker (104), the first speaker (104) being located at a second location of the ear inlet, the first speaker (104) being connected to the first microphone (102);
a second speaker (105), the second speaker (105) being located at a third position of the ear inlet, the second speaker (105) being connected to the second microphone (103).
2. The noise reducing headset of claim 1, wherein the first microphone (102) is oriented towards the ambient environment when the noise reducing headset is worn by a user;
the second microphone (103) is directed towards the side wall of the ear canal.
3. The noise reducing headset according to claim 1, wherein the first speaker (104) is connected to the first microphone (102) via the control chip;
the second loudspeaker (105) is connected with the second microphone (103) through the control chip.
4. The noise reducing earphone according to claim 1, wherein the first speaker (104) is oriented towards the side wall of the ear canal and the second speaker (105) is oriented towards the ear canal (106) when the noise reducing earphone is worn by a user, the orientation of the first speaker (104) and the orientation of the second speaker (105) forming a predetermined angle.
5. The noise reducing headset of claim 1, wherein the noise reducing headset is a semi-in-ear headset.
6. The noise reducing headset according to claim 1, wherein the first speaker (104) is located at a second position of the inlet ear, wherein the second position is close to the rear end (02);
the second speaker (105) is located at a third position of the ear inlet portion, wherein the third position is remote from the rear end portion (02).
7. A noise reduction method for a noise reduction headphone according to claims 1 to 6, wherein the method comprises:
acquiring an external environment noise signal;
generating a first audio signal in phase opposition to the ambient noise signal based on the ambient noise signal;
acquiring a second signal, wherein the second signal comprises a noise signal obtained by processing an external environment noise signal through the first audio signal;
separating the noise signal and a predetermined signal from the second signal, and generating a second audio signal having a phase opposite to that of the noise signal based on the noise signal;
superposing the second audio signal and the preset signal to generate a target audio signal;
and sending the target audio signal to the noise reduction earphone for playing.
8. The noise reduction method according to claim 7, characterized in that the first microphone (102) is used for acquiring an ambient noise signal;
the control chip is used for processing the external environment noise signal to form the first audio signal;
the first loudspeaker (104) is used for playing the first audio signal, and the first audio signal is used for superposition cancellation with the external environment noise;
the second microphone (103) is used for acquiring a second signal;
the control chip is used for processing the noise signal to form the second audio signal; the second audio signal and the predetermined signal are superposed and mixed to form a target audio signal;
the second speaker (105) is used for playing the target audio signal.
9. The noise reduction method according to claim 7, wherein the predetermined signal includes an audio signal.
10. An electronic device, characterized in that the electronic device comprises a noise reducing headphone according to any of the claims 1 to 6.
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| CN113453117A (en) * | 2021-08-16 | 2021-09-28 | 英华达（上海）科技有限公司 | Wireless Bluetooth composite earphone and control method thereof |
| CN113539226A (en) * | 2021-06-02 | 2021-10-22 | 国网河北省电力有限公司电力科学研究院 | Active noise reduction control method for transformer substation |
| CN113596661A (en) * | 2021-07-28 | 2021-11-02 | 维沃移动通信有限公司 | Earphone, feedback noise reduction method and device |
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| CN113453117A (en) * | 2021-08-16 | 2021-09-28 | 英华达（上海）科技有限公司 | Wireless Bluetooth composite earphone and control method thereof |
| CN113453117B (en) * | 2021-08-16 | 2022-08-30 | 英华达（上海）科技有限公司 | Wireless Bluetooth composite earphone and control method thereof |
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| CN111556391B (en) | 2022-02-25 |
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