CN113613131A - Air pressure detection self-adaptive noise reduction earphone and control method thereof - Google Patents
Air pressure detection self-adaptive noise reduction earphone and control method thereof Download PDFInfo
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- 230000004044 response Effects 0.000 claims description 33
- 230000007613 environmental effect Effects 0.000 claims description 16
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- 210000000613 ear canal Anatomy 0.000 claims description 10
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- 210000005069 ears Anatomy 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 6
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1083—Reduction of ambient noise
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17853—Methods, e.g. algorithms; Devices of the filter
- G10K11/17854—Methods, e.g. algorithms; Devices of the filter the filter being an adaptive filter
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
- G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
- H04R2460/01—Hearing devices using active noise cancellation
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Abstract
The invention provides an air pressure detection self-adaptive noise reduction earphone and a control method thereof. The noise reduction earphone comprises a shell and an audio module; the audio module comprises an audio input unit, a sound production unit, a noise reduction unit and an air pressure detection unit; the air pressure detection unit is used for detecting the acoustic leakage amount in the auditory canal when the earphone is in a wearing state and sending the acoustic leakage amount to the noise reduction unit; the noise reduction unit is internally provided with a plurality of noise reduction filters which are used for selecting the noise reduction filters according to the acoustic leakage amount, generating a first offset signal and transmitting the first offset signal to the sound production unit; the sound generating unit converts the first cancelling signal into a first sound signal capable of cancelling the noise signal. The noise reduction earphone provided by the invention solves the problem of poor noise reduction effect caused by low fit degree of the earphone and human ears in the prior art, and can realize self-adaptive noise reduction under the condition that the earphone and the human ears are not tightly fitted compared with the traditional active noise reduction earphone, thereby realizing better noise reduction effect.
Description
Technical Field
The invention relates to the field of earphone noise reduction, in particular to an air pressure detection self-adaptive noise reduction earphone and a control method thereof.
Background
With the rapid development of the earphone market, the noise reduction earphone has gradually become one of the common intelligent wearing products in people's life, and various types of products are in endless and are deeply loved by many consumers. The noise reduction earphone is an earphone which reduces noise by using a certain method. At present, two types of noise reduction earphones are an active noise reduction earphone and a passive noise reduction earphone.
The active noise reduction earphone mainly generates reverse sound waves equal to external noise through a noise reduction system to neutralize the noise, so that the noise reduction effect is realized. The passive noise reduction earphone reduces noise in a physical mode, for example, noise insulation materials such as earplugs and rubber are worn to block outside noise, so that the purpose of reducing noise is achieved. The active noise reduction earphone has good noise reduction effect on low-frequency and medium-frequency sound, and can be slightly different from high-frequency sound. The passive noise reduction earphone can effectively isolate high-frequency noise, but has no obvious effect on middle-frequency and low-frequency noise.
However, the active noise reduction headphones in the prior art still have some disadvantages. When a user wears the headset, the fit of the headset to the human ear can affect the audio quality. Under the normal condition, earphone and the comparatively inseparable laminating of ear can not produce too much revealing, and external atmospheric pressure can not get into the duct, and the earphone of making an uproar actively falls can realize good noise reduction. When earphone and human ear laminating degree are low, can produce great leakage volume, atmospheric pressure can get into the duct, and the earphone of making an uproar falls in the initiative can only offset external ambient noise, can't solve because of revealing the audio loss that the volume leads to, can't realize the best noise reduction effect.
Moreover, the structure of different human ears can be different, and the earphone can not give consideration to the physiological structure of various people. Consequently, when the earphone does not match with people's ear structure or the earphone is worn incorrectly, can lead to the laminating degree of earphone and people's ear low, in external atmospheric pressure got into the duct, there was the volume of revealing between earphone and the people's ear, lead to noise reduction effect poor. A noise reduction earphone with insufficient noise reduction may turn up the volume of the user in a noisy environment, and a certain risk of hearing impairment may exist when the noise sound pressure level is too high. The earphone can not match the best noise reduction parameters under different ear structures and different leakage conditions, and a user can not obtain the best experience.
Therefore, a noise reduction earphone is needed to solve the problem of poor noise reduction effect caused by low fitting degree of the earphone and human ears.
Disclosure of Invention
Based on the problems in the prior art, the invention provides an air pressure detection adaptive noise reduction earphone and a control method thereof. The specific technical scheme is as follows:
an air pressure detection self-adaptive noise reduction earphone comprises a shell and an audio module arranged in the shell;
the audio module comprises an audio input unit, a sounding unit, a noise reduction unit and an air pressure detection unit, wherein the noise reduction unit is connected with the audio input unit, the sounding unit and the air pressure detection unit, and a plurality of noise reduction filters are preset in the noise reduction unit;
the audio input unit acquires an input signal and converts the input signal into an acoustic signal through the sound production unit;
the air pressure detection unit is used for detecting the acoustic leakage amount in the ear canal when the earphone is in a wearing state and sending the acoustic leakage amount to the noise reduction unit;
the noise reduction unit is used for selecting the noise reduction filter according to the acoustic leakage amount, generating a first offset signal and transmitting the first offset signal to the sound production unit;
the sound production unit converts the first cancellation signal into a first sound signal capable of canceling a noise signal.
In a specific embodiment, the noise reduction device further comprises a noise acquisition unit, wherein the noise acquisition unit is connected with the noise reduction unit;
the noise acquisition unit is used for acquiring environmental noise and sending the environmental noise to the noise reduction unit;
the noise reduction unit selects the noise reduction filter according to the environmental noise, generates a second offset signal and transmits the second offset signal to the sound production unit;
the sound generating unit converts the second cancelling signal into a second sound signal capable of cancelling ambient noise.
In a specific embodiment, the noise reduction filter is used for compensating the frequency response of the sound production unit in a low frequency band;
different noise reduction filters compensate the sound generating unit frequency response differently.
In a specific embodiment, the acoustic leakage is divided into a plurality of leakage regions in advance according to the size of the leakage, and each leakage region corresponds to one or a plurality of noise reduction filters;
and the noise reduction unit judges a leakage area where the acoustic leakage amount is positioned and selects a corresponding noise reduction filter.
In a specific embodiment, the leakage zones include a first leakage zone, a second leakage zone and a third leakage zone, and the leakage amounts corresponding to the first leakage zone, the second leakage zone and the third leakage zone are sequentially increased;
the noise reduction unit is preset with a first noise reduction filter, a second noise reduction filter and a third noise reduction filter, and the compensation of the first noise reduction filter, the second noise reduction filter and the third noise reduction filter to the frequency response of the sounding unit is increased in sequence;
the noise reduction unit selects the first noise reduction filter when the acoustic leakage is in the first leakage region;
the noise reduction unit selects the second noise reduction filter when the acoustic leakage is in the second leakage region;
the noise reduction unit selects the third noise reduction filter when the acoustic leakage is in the third leakage region.
In a specific embodiment, a net-shaped structure is arranged on the shell, and the sound production unit is provided with a loudspeaker;
the air pressure detection unit is located between the horn and the mesh structure.
In a specific embodiment, the device further comprises an in-ear detection unit, wherein the in-ear detection unit is connected with the noise reduction unit;
the in-ear detection unit is used for detecting whether the earphone is in a wearing state.
A control method of an air pressure detection self-adaptive noise reduction earphone is suitable for any one of the air pressure detection self-adaptive noise reduction earphones, and the air pressure detection self-adaptive noise reduction earphone comprises a shell and an audio module arranged in the shell;
the audio module comprises an audio input unit, a sound production unit, a noise reduction unit and an air pressure detection unit, wherein the noise reduction unit is connected with the audio input unit, the sound production unit and the air pressure detection unit;
the method comprises the following steps:
acquiring an input signal through the audio input unit, and converting the input signal into an acoustic signal through the sound production unit;
the air pressure detection unit detects the acoustic leakage amount in the ear canal when the earphone is in a wearing state and sends the acoustic leakage amount to the noise reduction unit;
a plurality of noise reduction filters are preset in the noise reduction unit, the noise reduction filters are selected according to the acoustic leakage amount, and a first offset signal is generated and transmitted to the sound production unit;
the sound production unit converts the first cancellation signal into a first sound signal capable of canceling a noise signal.
In a specific embodiment, the air pressure detection adaptive noise reduction earphone further comprises a noise acquisition unit;
the method further comprises the following steps:
the noise acquisition unit acquires environmental noise and sends the environmental noise to the noise reduction unit;
the noise reduction unit selects the noise reduction filter according to the environment noise signal, generates a second offset signal and transmits the second offset signal to the sound production unit;
the sound generating unit converts the second cancelling signal into a second sound signal capable of cancelling ambient noise.
In a specific embodiment, the acoustic leakage is divided into a plurality of leakage regions in advance according to the size of the leakage, and each leakage region corresponds to one or a plurality of noise reduction filters;
and the noise reduction unit judges a leakage area where the acoustic leakage amount is positioned and selects a corresponding noise reduction filter.
The invention has the following beneficial effects:
the invention provides an air pressure detection self-adaptive noise reduction earphone and a control method thereof, and solves the problem of poor noise reduction effect caused by low fitting degree of the earphone and human ears in the prior art. Through setting up the atmospheric pressure detecting element, detect the acoustics of earphone in the duct when wearing the state and reveal the volume, the unit of making an uproar of falling judges the condition of revealing, selects different noise reduction filter to compensate to the different condition of revealing, reaches best noise reduction effect. Compared with the traditional active noise reduction earphone, the noise reduction earphone provided by the invention can realize self-adaptive noise reduction under the condition that the earphone is not tightly attached to human ears, and can realize better noise reduction effect.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a sectional view of a noise reduction headphone according to an embodiment of the present invention;
fig. 2 is a block diagram of an audio module according to an embodiment of the present invention;
fig. 3 is an exploded view of a noise reduction earphone according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a fitting relationship between an earphone and a human ear according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view C-C of FIG. 4 according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view B-B of FIG. 4 according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a frequency response logic curve of a sound generating unit according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a frequency response logic curve of a noise reduction filter according to an embodiment of the present invention;
fig. 9 is a flowchart illustrating a noise reduction headphone control method according to an embodiment of the present invention.
Reference numerals: 1-a shell; 2-an audio module; 11-a lower cover; 12-a scaffold; 13-face cover; 14-a network structure; 21-an audio input unit; 22-a noise reduction unit; 23-a sound emitting unit; 24-an air pressure detection unit; 25-a noise collection unit; 26-an in-ear detection unit.
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the noise signal in the present invention is interference noise due to the amount of leakage, and the environmental noise is noise generated by the external environment of the headphone. The active noise reduction headphone only processes ambient noise, but does not process noise signals due to leakage.
The acoustic signal, the first acoustic signal and the second acoustic signal in the invention belong to three different audio signals. The sound signal is an audio signal to be played by the earphone, the first sound signal is an audio signal generated for offsetting a noise signal caused by leakage, and the second sound signal is an audio signal generated for offsetting external environment noise.
Example 1
In order to overcome the defects in the prior art, the embodiment provides an air pressure detection adaptive noise reduction earphone, and the structural cross-sectional view of the earphone is shown in the attached drawing 1 of the specification. The specific scheme is as follows:
an air pressure detection self-adaptive noise reduction earphone comprises a shell 1 and an audio module 2 arranged in the shell 1. The external structure of the shell 1 is schematically shown in the attached figure 1 in the specification. The audio module 2 includes an audio input unit 21, a sound generating unit 23, a noise reduction unit 22 and an air pressure detecting unit 24, the noise reduction unit 22 is connected to the audio input unit 21, the sound generating unit 23 and the air pressure detecting unit 24, and a schematic diagram of a connection relationship between the modules is shown in fig. 2 of the specification. The noise reduction earphone provided by the embodiment realizes noise reduction processing through three parts of leakage measurement, filter compensation control and sound field superposition.
The shell 1 comprises a lower cover 11, a bracket 12 and a surface cover 13, wherein a net-shaped structure 14 is arranged on the surface cover 13. In the embodiment, the composition structures are as shown in the specification and the attached figure 3. It should be noted that the structure of the housing 1 includes, but is not limited to, any one of known earphone structures, and the structures of the lower cover 11, the stand 12 and the face cover 13 may be adapted to various known earphone types.
The audio module 2 further comprises a noise collection unit 25, and the noise collection unit 25 is connected to the noise reduction unit 22. The noise collection unit 25 is provided with a feedforward microphone, and can collect external environmental noise. The noise reduction unit 22 selects a noise reduction filter according to the ambient noise signal, generates a second cancellation signal and transmits the second cancellation signal to the sound production unit 23; the sound emitting unit 23 converts the second cancelling signal into a second sound signal capable of cancelling the ambient noise. The second acoustic signal is mainly to cancel ambient noise. The existing active noise reduction earphone mainly reduces the noise of the environment.
The noise collection unit 25 picks up an external environment noise signal through a feedforward microphone and transmits the external environment noise signal to the noise reduction unit 22, the noise reduction unit 22 transmits preset noise reduction filter parameters to the sound production unit 23 to produce a second sound signal, and the second sound signal is an inverted signal and can offset the environment noise. Two microphones are arranged in the noise reduction earphone provided by the embodiment, one microphone is used for recording human voice, the other microphone is used for identifying environmental noise, and the active noise reduction effect is achieved by silencing the environmental noise.
The audio input unit 21 is mainly used for acquiring an input signal, and the audio input unit 21 can perform data interaction with the intelligent terminal to acquire an audio signal to be played. The audio input unit 21 is connected to the noise reduction unit 22, the input signal is transmitted to the sound generation unit 23 through the noise reduction unit 22, and the sound generation unit 23 converts the input signal into an acoustic signal for playing. The acoustic signal is a signal to be played, such as music.
The air pressure detecting unit 24 detects the acoustic leakage in the ear canal when the earphone is worn, and sends the acoustic leakage to the noise reducing unit 22. The air pressure detecting unit 24 is provided with an air pressure sensor, and detects air pressure in the ear canal by the air pressure sensor. The amount of acoustic leakage is closely related to the air pressure within the ear canal and to some extent can be considered as the air pressure within the ear canal.
The wearing relationship between the earphone and the human ear is shown in the attached figure 4 in the specification. The structure of cross-section C-C is shown as specification figure 5, and earphone and people's ear can have the volume of revealing, and external atmospheric pressure can flow into the duct according to the direction of arrow in figure 5 in, and then influences the noise reduction effect of earphone. The structure of the section B-B is shown in figure 6 in the specification, and no leakage exists at M, N.
The earphone is high with the laminating degree of people's ear, and is sealed effectual, and in external atmospheric pressure was difficult to get into the duct, noise reduction effect was not influenced, and the broadcast effect of earphone this moment is best. If the earphone is worn normally and the fit degree of the earphone and the human ear is high, the air pressure in the auditory canal is P; when the earphone is worn abnormally or the fit degree of the earphone and the human ear is low, the air pressure in the auditory canal is smaller than P. As P becomes smaller, the amount of acoustic leakage in the ear canal becomes larger, and the frequency response of the sound generating unit 23 in the low frequency band also decreases, so that the difference between the frequency response and the ideal frequency response becomes larger, and the playing effect of the earphone becomes worse. The playing effect is not limited to the audio quality, but also includes indexes such as transmission rate and the like.
Through the air pressure detection unit 24, the noise reduction unit 22 can accurately obtain the acoustic leakage amount of the headset in a wearing state, and the optimal noise reduction filter is matched under different leakage conditions, so that the optimal noise reduction effect and playing effect are achieved.
Specifically, a plurality of noise reduction filters are preset in the noise reduction unit 22. The noise reduction unit 22 selects a noise reduction filter according to the acoustic leakage amount, generates a first cancellation signal, and transmits the first cancellation signal to the sound emission unit 23. The noise reduction filter has high integration level of a hardware structure. The noise reduction unit 22 is preset with a plurality of sets of noise reduction filters, and can compensate the frequency response of the sound generation unit 23 in a low frequency band, and correct phase errors and amplitude errors of the frequency response. Different noise reduction filters are selected for compensation according to different leakage amounts, and the different noise reduction filters compensate the frequency response of the sound generating unit 23 differently.
The sound generating unit 23 converts the first canceling signal into a first acoustic signal capable of canceling a noise signal, and the first acoustic signal is mainly used for canceling the noise signal caused by the leakage amount. Even if the fit degree of the earphone and the human ear is not high, the air pressure self-adaption can be realized through the noise reduction unit 22 in the earphone, and noise signals caused by leakage amount are eliminated. The sound generating unit 23 outputs the first sound signal to cancel the ambient noise, the second sound signal to cancel the noise signal caused by the leakage amount, and the output sound signal does not contain noise basically, so that the optimal noise reduction effect can be achieved.
In particular, the present embodiment divides the acoustic leakage amount into a plurality of leakage regions in advance according to the magnitude of the leakage amount, and each leakage region corresponds to a noise reduction filter. The noise reduction unit 22 can select a corresponding noise reduction filter by only judging a leakage region where the acoustic leakage amount is located. The amount of leakage affects the frequency response of sound emitting unit 23. Ideally, the earphone fits the human ear to a high degree, and there is no leakage, and the frequency response of the sound generating unit 23 is an ideal frequency response. Since the noise reduction filter has a good noise reduction effect on the noise in the middle and low frequency bands, this embodiment only exemplifies the signal in the middle and low frequency bands.
For example, the leakage zones include a first leakage zone, a second leakage zone, and a third leakage zone, and the leakage amounts corresponding to the first leakage zone, the second leakage zone, and the third leakage zone increase in sequence. The leakage amount of the first leakage area is the lowest, the fitting degree of the earphone and the human ear is the highest, the sealing performance is the best, the difference between the frequency response of the sound generating unit 23 and the ideal frequency response is the smallest, the amplitude difference is the smallest, and the phase difference is the smallest; the third leakage area has the highest leakage amount, the lowest fit degree between the earphone and the human ear, the worst sealing performance, the largest difference between the frequency response and the ideal frequency response of the sound generating unit 23, the largest amplitude difference and the largest phase difference.
The noise reduction unit 22 is preset with a first noise reduction filter, a second noise reduction filter and a third noise reduction filter, and the compensation of the first noise reduction filter, the second noise reduction filter and the third noise reduction filter to the frequency response of the sound generation unit 23 is sequentially increased. The first noise reduction filter has the minimum compensation for the frequency response of the sound generating unit 23, the minimum amplitude compensation, and the minimum phase compensation. The third noise reduction filter has the largest compensation for the frequency response of the sound generating unit 23, the largest amplitude compensation and the largest phase compensation.
When the acoustic leakage is in the first leakage region, the noise reduction unit 22 selects a first noise reduction filter;
when the acoustic leakage is in the second leakage region, the noise reduction unit 22 selects a second noise reduction filter;
when the acoustic leakage is in the third leakage region, the noise reduction unit 22 selects the third noise reduction filter.
It should be noted that the noise reduction filter preset for each leakage region is set according to experimental data. The compensation of the frequency response by each noise reduction filter is substantially fixed. And the leakage area is reasonably divided by obtaining the frequency response under different acoustic leakage amounts. The amount of leakage in the leakage region can be compensated for using a specific noise reduction filter. The ideal frequency response and the actual frequency response have differences in amplitude and phase, and the noise reduction filter needs to be selected according to the amplitude and the phase, so that the compensation effect is optimal.
The frequency response curve of the sound generating unit 23 is shown in fig. 7 of the specification, and the abscissa is frequency and the ordinate is amplitude. The uppermost curve L1 is an ideal frequency response, and A, B, C corresponds to the first leakage region, the second leakage region, and the third leakage region, respectively. As can be seen from the logical graph of the curve, the frequency response in the third leakage region is greatly different from the ideal frequency response. Fig. 8 in the specification is a frequency response curve of three noise reduction filters, wherein the abscissa is frequency and the ordinate is amplitude. As can be seen from the graph, the compensation of the noise reduction filter a is the lowest, and is applicable to the first leakage region. The noise reduction filter b may be applied to the second leakage region. The noise reduction filter c has the highest compensation and is applicable to the third leakage region. The noise reduction filter compensates for low frequency energy used to cancel noise signals, achieving better noise reduction under leakage conditions.
It should be noted that, the description fig. 7 and the description fig. 8 provided in this embodiment are only experimental data for example, and are used to describe logical relationships, and are not actual application curve data.
The specific structure of the noise reduction earphone is as shown in fig. 3 in the specification, a mesh structure 14 is arranged on the housing 1, a speaker is arranged on the sound generating unit 23, and an air pressure detecting unit 24 is located between the speaker and the mesh structure 14 and used for detecting air pressure in an ear canal. The structure of the air pressure detecting unit 24 is shown in fig. 3.
The audio module 2 further includes an in-ear detection unit 26, and the in-ear detection unit 26 is connected to the noise reduction unit 22. The in-ear detection unit 26 is used for detecting whether the earphone is in a wearing state. When the in-ear detection unit 26 detects that the earphone is in a wearing state, the noise reduction unit 22 controls the air pressure detection unit 24 to perform leakage amount detection. In the present embodiment, the in-ear detection unit 26 is provided with an in-ear detection FPC, and the structure is shown in fig. 3 in the specification.
The embodiment provides an air pressure detection self-adaptive noise reduction earphone, which detects the leakage amount of the earphone in a wearing state through an air pressure detection unit, selects a proper noise reduction filter to reduce noise according to the leakage amount, generates an acoustic signal for offsetting a noise signal, compensates the energy lost due to the offsetting of the noise signal, and realizes better noise reduction under the leakage condition.
Example 2
In this embodiment, the noise reduction headphone of embodiment 1 is implemented as a method based on embodiment 1, so as to form a control method for an air pressure detection adaptive noise reduction headphone. The flow chart of the control method is shown in the specification and figure 9. The specific scheme is as follows:
the control method provided by the embodiment is suitable for the noise reduction earphone of embodiment 1, and the noise reduction earphone includes a housing and an audio module disposed in the housing. The audio module comprises an audio input unit, a sound production unit, a noise reduction unit and an air pressure detection unit, wherein the noise reduction unit is connected with the audio input unit, the sound production unit and the air pressure detection unit.
A control method of an air pressure detection self-adaptive noise reduction earphone comprises the following steps:
101. acquiring an input signal through an audio input unit, and converting the input signal into an acoustic signal through a sound production unit;
102. the air pressure detection unit detects the acoustic leakage amount in the auditory canal when the earphone is in a wearing state and sends the acoustic leakage amount to the noise reduction unit;
103. a plurality of noise reduction filters are preset in the noise reduction unit, the noise reduction filters are selected according to the acoustic leakage amount, and a first offset signal is generated and transmitted to the sound production unit;
104. the sound generating unit converts the first cancelling signal into a first sound signal capable of cancelling the noise signal.
The air pressure detection self-adaptive noise reduction earphone further comprises a noise acquisition unit. The control method further comprises the following steps:
201. the noise acquisition unit acquires environmental noise and sends the environmental noise to the noise reduction unit;
202. the noise reduction unit selects a noise reduction filter according to the environment noise signal, generates a second offset signal and transmits the second offset signal to the sound production unit;
203. the sound generating unit converts the second cancelling signal into a second sound signal capable of cancelling the ambient noise.
The embodiment divides the acoustic leakage into a plurality of leakage regions in advance according to the size of the leakage, and each leakage region corresponds to a noise reduction filter. Step 103 further comprises: and the noise reduction unit judges a leakage area where the acoustic leakage amount is positioned and selects a corresponding noise reduction filter.
The present embodiment provides a control method for an air pressure detection adaptive noise reduction earphone, which makes the noise reduction model adopted by the noise reduction earphone of embodiment 1 more practical.
The invention provides an air pressure detection self-adaptive noise reduction earphone and a control method thereof, and solves the problem of poor noise reduction effect caused by low fitting degree of the earphone and human ears in the prior art. Through setting up the atmospheric pressure detecting element, detect the acoustics of earphone in the duct when wearing the state and reveal the volume, the unit of making an uproar of falling judges the condition of revealing, selects different noise reduction filter to compensate to the different condition of revealing, reaches best noise reduction effect. Compared with the traditional active noise reduction earphone, the noise reduction earphone provided by the invention can realize self-adaptive noise reduction under the condition that the earphone is not tightly attached to human ears, and can realize better noise reduction effect.
Those skilled in the art will appreciate that the figures are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.
Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The above-mentioned invention numbers are merely for description and do not represent the merits of the implementation scenarios.
The above disclosure is only a few specific implementation scenarios of the present invention, however, the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (10)
1. The air pressure detection self-adaptive noise reduction earphone is characterized by comprising a shell and an audio module arranged in the shell;
the audio module comprises an audio input unit, a sounding unit, a noise reduction unit and an air pressure detection unit, wherein the noise reduction unit is connected with the audio input unit, the sounding unit and the air pressure detection unit, and a plurality of noise reduction filters are preset in the noise reduction unit;
the audio input unit acquires an input signal and converts the input signal into an acoustic signal through the sound production unit;
the air pressure detection unit is used for detecting the acoustic leakage amount in the ear canal when the earphone is in a wearing state and sending the acoustic leakage amount to the noise reduction unit;
the noise reduction unit is used for selecting the noise reduction filter according to the acoustic leakage amount, generating a first offset signal and transmitting the first offset signal to the sound production unit;
the sound production unit converts the first cancellation signal into a first sound signal capable of canceling a noise signal.
2. The air pressure detection adaptive noise reduction earphone according to claim 1, further comprising a noise collection unit connected to the noise reduction unit;
the noise acquisition unit is used for acquiring environmental noise and sending the environmental noise to the noise reduction unit;
the noise reduction unit selects the noise reduction filter according to the environmental noise, generates a second offset signal and transmits the second offset signal to the sound production unit;
the sound generating unit converts the second cancelling signal into a second sound signal capable of cancelling ambient noise.
3. The air pressure detecting adaptive noise reducing earphone according to claim 1, wherein the noise reducing filter is used for compensating the frequency response of the sound generating unit in a low frequency band;
different noise reduction filters compensate the sound generating unit frequency response differently.
4. The air pressure detection adaptive noise reduction earphone according to claim 3, wherein the acoustic leakage amount is pre-divided into a plurality of leakage regions according to the size of the leakage amount, and each leakage region corresponds to one or more noise reduction filters;
and the noise reduction unit judges a leakage area where the acoustic leakage amount is positioned and selects a corresponding noise reduction filter.
5. The air pressure detection adaptive noise reduction earphone according to claim 4, wherein the leakage regions comprise a first leakage region, a second leakage region and a third leakage region, and the leakage amounts of the first leakage region, the second leakage region and the third leakage region are increased in sequence;
the noise reduction unit is preset with a first noise reduction filter, a second noise reduction filter and a third noise reduction filter, and the compensation of the first noise reduction filter, the second noise reduction filter and the third noise reduction filter to the frequency response of the sounding unit is increased in sequence;
the noise reduction unit selects the first noise reduction filter when the acoustic leakage is in the first leakage region;
the noise reduction unit selects the second noise reduction filter when the acoustic leakage is in the second leakage region;
the noise reduction unit selects the third noise reduction filter when the acoustic leakage is in the third leakage region.
6. The air pressure detection adaptive noise reduction earphone according to claim 1, wherein a net structure is arranged on the shell, and the sound production unit is provided with a loudspeaker;
the air pressure detection unit is located between the horn and the mesh structure.
7. The air pressure detection adaptive noise reduction earphone according to claim 1, further comprising an in-ear detection unit connected to the noise reduction unit;
the in-ear detection unit is used for detecting whether the earphone is in a wearing state.
8. A control method of an air pressure detection adaptive noise reduction earphone is suitable for the air pressure detection adaptive noise reduction earphone according to any one of claims 1-7, and is characterized in that the air pressure detection adaptive noise reduction earphone comprises a shell and an audio module arranged in the shell;
the audio module comprises an audio input unit, a sound production unit, a noise reduction unit and an air pressure detection unit, wherein the noise reduction unit is connected with the audio input unit, the sound production unit and the air pressure detection unit;
the method comprises the following steps:
acquiring an input signal through the audio input unit, and converting the input signal into an acoustic signal through the sound production unit;
the air pressure detection unit detects the acoustic leakage amount in the ear canal when the earphone is in a wearing state and sends the acoustic leakage amount to the noise reduction unit;
a plurality of noise reduction filters are preset in the noise reduction unit, the noise reduction filters are selected according to the acoustic leakage amount, and a first offset signal is generated and transmitted to the sound production unit;
the sound production unit converts the first cancellation signal into a first sound signal capable of canceling a noise signal.
9. The control method of claim 8, wherein the air pressure detection adaptive noise reduction headphone further comprises a noise acquisition unit;
the method further comprises the following steps:
the noise acquisition unit acquires environmental noise and sends the environmental noise to the noise reduction unit;
the noise reduction unit selects the noise reduction filter according to the environment noise signal, generates a second offset signal and transmits the second offset signal to the sound production unit;
the sound generating unit converts the second cancelling signal into a second sound signal capable of cancelling ambient noise.
10. The control method according to claim 8, wherein the acoustic leakage is divided into a plurality of leakage regions in advance according to the size of the leakage, and each leakage region corresponds to one or more noise reduction filters;
and the noise reduction unit judges a leakage area where the acoustic leakage amount is positioned and selects a corresponding noise reduction filter.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114143653A (en) * | 2021-11-30 | 2022-03-04 | 深圳市科奈信科技有限公司 | Earphone reception mode switching method and earphone |
| EP4243440A1 (en) * | 2022-03-09 | 2023-09-13 | Nokia Technologies Oy | Determination of seal quality |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108401204A (en) * | 2018-01-22 | 2018-08-14 | 广东思派康电子科技有限公司 | A kind of novel active noise reduction earphone |
| CN108737923A (en) * | 2018-05-22 | 2018-11-02 | Oppo广东移动通信有限公司 | Volume adjusting method and related product |
| CN109068226A (en) * | 2018-09-29 | 2018-12-21 | 安克创新科技股份有限公司 | Earphone and its control method |
| KR20190058162A (en) * | 2017-11-21 | 2019-05-29 | 삼성전자주식회사 | Air pressure adjusting apparatus and air pressure adjusting method of the air pressure adjusting apparatus |
| WO2020193324A1 (en) * | 2019-03-22 | 2020-10-01 | Ams Ag | Audio system and signal processing method for an ear mountable playback device |
| CN111836147A (en) * | 2019-04-16 | 2020-10-27 | 华为技术有限公司 | Noise reduction device and method |
-
2021
- 2021-07-30 CN CN202110873892.6A patent/CN113613131B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190058162A (en) * | 2017-11-21 | 2019-05-29 | 삼성전자주식회사 | Air pressure adjusting apparatus and air pressure adjusting method of the air pressure adjusting apparatus |
| CN108401204A (en) * | 2018-01-22 | 2018-08-14 | 广东思派康电子科技有限公司 | A kind of novel active noise reduction earphone |
| CN108737923A (en) * | 2018-05-22 | 2018-11-02 | Oppo广东移动通信有限公司 | Volume adjusting method and related product |
| CN109068226A (en) * | 2018-09-29 | 2018-12-21 | 安克创新科技股份有限公司 | Earphone and its control method |
| WO2020193324A1 (en) * | 2019-03-22 | 2020-10-01 | Ams Ag | Audio system and signal processing method for an ear mountable playback device |
| CN111836147A (en) * | 2019-04-16 | 2020-10-27 | 华为技术有限公司 | Noise reduction device and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114143653A (en) * | 2021-11-30 | 2022-03-04 | 深圳市科奈信科技有限公司 | Earphone reception mode switching method and earphone |
| CN114143653B (en) * | 2021-11-30 | 2024-05-28 | 深圳市科奈信科技有限公司 | Earphone radio mode switching method and earphone |
| EP4243440A1 (en) * | 2022-03-09 | 2023-09-13 | Nokia Technologies Oy | Determination of seal quality |
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|---|---|
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