CN109495801A - The noise-reduction method of earmuff and earmuff - Google Patents
The noise-reduction method of earmuff and earmuff Download PDFInfo
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- CN109495801A CN109495801A CN201811424200.4A CN201811424200A CN109495801A CN 109495801 A CN109495801 A CN 109495801A CN 201811424200 A CN201811424200 A CN 201811424200A CN 109495801 A CN109495801 A CN 109495801A
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- Prior art keywords
- acoustical cotton
- noise
- earmuff
- amplitude
- compression set
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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
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
Abstract
Embodiment of the present invention is related to noise protection field, discloses the noise-reduction method of a kind of earmuff and earmuff.In the present invention, earmuff includes at least one cover, sound acquisition module, acoustical cotton, compression set and processing unit, and sound acquisition module acquires environmental noise, obtains the noise amplitude of environmental noise；Acoustical cotton manufactures acoustic resistance in cover；Compression set changes for compressing acoustical cotton in cover and covers intracorporal acoustic resistance；Processing unit is electrically connected with compression set and sound acquisition module respectively, prestores the default amplitude of environmental noise；Processing unit obtains the noise amplitude that sound acquisition module obtains, and according to noise amplitude, the expectation resistance value of acoustic resistance needed for the noise amplitude is decreased to default amplitude is calculated, processing unit controls decrement of the compression set when compressing acoustical cotton also according to desired resistance value.Thus increase acoustic resistance after acoustical cotton is compressed, by extraneous lower noise to default amplitude, noise reduction is effectively performed, reduces the injury to human ear.
Description
Technical field
Embodiment of the present invention is related to noise protection field, the in particular to noise-reduction method of a kind of earmuff and earmuff.
Background technique
Earmuff is widely used in isolation environment noise in the ordinary life and work of people, provides opposite peace for user
Quiet environment.At least there are the following problems in the prior art: current earmuff is mainly generated by noise reduction system and is made an uproar with the external world
The equal reversed sound wave of sound neutralizes noise, perhaps stops outside noise by surrounding ear formation enclosure space or adopts
Stop outside noise with acoustic materials such as silica gel earplugs, not can be effectively carried out noise reduction, human ear is damaged, causes long-term
The crowd's Hearing lived under noisy environment.
Summary of the invention
A kind of noise-reduction method for being designed to provide earmuff and earmuff of embodiment of the present invention, makes it possible to effectively carry out
Noise reduction reduces the injury to human ear.
In order to solve the above technical problems, embodiments of the present invention provide a kind of earmuff, including at least one cover, also
Include:
Sound acquisition module obtains the noise amplitude of environmental noise for acquiring environmental noise；
Acoustical cotton is set in the cover, for manufacturing acoustic resistance in the cover；
Compression set is set in the cover, for compressing the acoustical cotton, changes the intracorporal acoustic resistance of cover；
Processing unit is electrically connected with the compression set and the sound acquisition module respectively, and prestores environmental noise
Default amplitude；
The processing unit is used to obtain the noise amplitude that the sound acquisition module obtains, and according to the noise width
Value, calculates the expectation resistance value of acoustic resistance needed for the noise amplitude is decreased to the default amplitude, and the processing unit is also used to root
Decrement of the compression set when compressing the acoustical cotton is controlled according to the expectation resistance value being calculated.
Embodiments of the present invention additionally provide a kind of noise-reduction method of earmuff, are equipped with acoustical cotton in the cover of the earmuff
With the compression set for compressing the acoustical cotton；The acoustical cotton is also used to for manufacturing acoustic resistance in the cover described
Compression set compress when change the acoustic resistance, the noise-reduction method the following steps are included:
Extraneous environmental noise is acquired, the noise amplitude of environmental noise is obtained；
According to the noise amplitude, the expectation resistance value of acoustic resistance needed for the noise amplitude is decreased to default amplitude is calculated；
After the expectation resistance value of required acoustic resistance is calculated, controls the compression set and compress the acoustical cotton, and according to
The expectation resistance value controls the compression set in the decrement for compressing the acoustical cotton.
Embodiment of the present invention further includes sound collection since earmuff not only includes cover in terms of existing technologies
Module, acoustical cotton, compression set and processing unit.Also, acoustical cotton and compression set are arranged in cover, and by sound
Acquisition module acquires the noise of external environment, obtains the noise amplitude of environmental noise, then, by processing unit according to getting
Noise amplitude calculates the noise amplitude being decreased to expectation acoustic resistance value required for default noise amplitude, finally, processing unit root
According to the decrement for the expectation acoustic resistance value control acoustical cotton being calculated, acoustical cotton is pressed according to decrement by compression set
Contracting.Thus after acoustical cotton is compressed, increase acoustic resistance, by extraneous lower noise to default amplitude, noise reduction is effectively performed, subtracts
Few injury to human ear.
In addition, the compression set includes: several magnet, carry out ring around the acoustical cotton and set, and with the acoustical cotton into
Row is fixed；Coil is wound the acoustical cotton for being equipped with several magnet, for generating magnetic field after powered up, respectively
The magnet is for, towards the movement of the direction of the acoustical cotton, compressing the acoustical cotton under the magnetic fields of the coil；It is described
Coil is also electrically connected with the processing unit, the processing unit be also used to according to the expectation resistance value of acoustic resistance being calculated to
The coil exports the electric current of the corresponding expectation resistance value size.It is accurately controlled so as to the decrement to compression cotton, in turn
Noise reduction accurately can be carried out to external sound, reduce the injury to human ear.
In addition, the acoustical cotton is column structure, and each magnet is set around the axis ring of the acoustical cotton, and the cover
Body is respectively provided with along the two sides of the axis direction of the acoustical cotton into sound mouth and sound mouth.
In addition, the earmuff further include: the of closing first waterproof ventilative layer into sound mouth, the closing sound mouth
Two waterproof ventilative layers.So that can avoid mosquito when sleeping and when field exploration enters the risk of ear canal, also, pass through first
Waterproof ventilative layer and the second waterproof ventilative layer can effectively prevent water to enter ear canal.
In addition, first waterproof ventilative layer and second waterproof ventilative layer include: at least two-layer nonwoven, setting
Ventilated membrane between two layers non-woven fabrics.
In addition, the sound acquisition module is noise reduction microphone.
In addition, the earmuff further include: communication module, with the processing unit be electrically connected, also with the user terminal
Side is communicated；The subscriber terminal side is used for through the communication module to the environmental noise prestored in the processing unit
Default amplitude is set.To which the default amplitude of volume can be arranged in user according to their needs.
In addition, there are two the cover sets, and the earmuff further include: the connector of two covers of connection, the sound
Acquisition module and the processing unit are arranged on the connector.
In addition, the connector is neck hanging type connector or wear-type connector.So as to facilitate user to wear.
In addition, the compression set includes:
Several magnet carry out ring around the acoustical cotton and set, and are fixed with the acoustical cotton；
Coil is wound the acoustical cotton for being equipped with several magnet, for generating magnetic field after powered up, respectively
The magnet is for, towards the movement of the direction of the acoustical cotton, compressing the acoustical cotton under the magnetic fields of the coil；
The control compression set compresses the acoustical cotton, and is existed according to the expectation resistance value to the compression set
It compresses in the step of the decrement of the acoustical cotton is controlled and specifically includes:
According to the expectation resistance value for the acoustic resistance being calculated, continue to calculate coil corresponding to the expectation resistance value obtaining electric electric current
Value；
It is powered with the current value being calculated to the coil.To accurately control noise reduction effect.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these are exemplary
Illustrate not constitute the restriction to embodiment, the element in attached drawing with same reference numbers label is expressed as similar member
Part, unless there are special statement, composition does not limit the figure in attached drawing.
Fig. 1 is ear cover structure schematic diagram in first embodiment of the invention；
Fig. 2 is earmuff Longitudinal cross section schematic in first embodiment of the invention；
Fig. 3 is earmuff cross-sectional view in first embodiment of the invention；
Fig. 4 is compression set structural schematic diagram in first embodiment of the invention；
Fig. 5 is the flow chart of the noise-reduction method of earmuff in third embodiment of the invention；
Fig. 6 is ear cover structure schematic diagram in the noise-reduction method of earmuff in third embodiment of the invention；
Fig. 7 is earmuff Longitudinal cross section schematic in the noise-reduction method of earmuff in third embodiment of the invention；
Fig. 8 is compression set structural schematic diagram in the noise-reduction method of earmuff in third embodiment of the invention.
As shown in the figure, 1- cover；11- is into sound mouth；12- sound mouth；2- sound acquisition module；3- acoustical cotton；4- compression dress
It sets；41- magnet；42- coil；5- processing unit；The first waterproof ventilative layer of 6-；The second waterproof ventilative layer of 7-；8- flexibility silica gel；9-
Hard shell.
Specific embodiment
To keep the purposes, technical schemes and advantages of embodiment of the present invention clearer, below in conjunction with attached drawing to this hair
Bright each embodiment is explained in detail.However, it will be understood by those skilled in the art that in each implementation of the invention
In mode, in order to make the reader understand this application better, many technical details are proposed.But it is even if thin without these technologies
Section and various changes and modifications based on the following respective embodiments, also may be implemented the application technical solution claimed.
The first embodiment of the present invention is related to a kind of earmuffs, as shown in Figure 1, Figure 2, Figure 3, Figure 4, including two covers 1,
Sound acquisition module 2, acoustical cotton 3, compression set 4 and processing unit 5 form.Wherein, two covers 1 divide for left ear and auris dextra
Two parts, and left ear is connected with auris dextra by connector, the connection of neck hanging type connector or wear-type can be used in connector
Part, processing unit 5 are electrically connected with compression set 4 and sound acquisition module 2 respectively.In addition, acoustical cotton 3 and compression set 4 are equal
It is arranged in cover 1, and sound acquisition module 2 and processing unit 5 are separately positioned on connector.Sound acquisition module 2 is used for
Environmental noise is acquired, and obtains the noise amplitude of environmental noise, acoustical cotton 3 in cover 1 for manufacturing acoustic resistance, and compression set
4 for compressing acoustical cotton 3, and the compression degree by changing acoustical cotton 3, and then changes the acoustic resistance in cover 1.Also, it handles
The default amplitude of environmental noise is prestored in unit 5, and with the corresponding audio algorithm of noise amplitude and compression cotton decrement, and
After processing unit 5 gets the obtained noise amplitude of sound acquisition module 2, calculated according to noise amplitude by the noise amplitude
It is decreased to the desired value of acoustic resistance required for default amplitude, then by processing unit 5 according to the acoustic resistance desired value control being calculated
Compression set 4 processed compresses acoustical cotton 3, is lowered into the amplitude of the noise in cover 1, protects to human ear.
Through the above it is not difficult to find that since acoustical cotton 3 can manufacture acoustic resistance in cover 1, and compression set 4 can
Acoustical cotton 3 is compressed in cover 1, and the decrement by changing acoustical cotton 3 changes the acoustic resistance value in cover 1, and then changes defeated
Enter the magnitude of sound to human ear.Also, sound acquisition module 2 can acquire the noise of external environment, and obtain environmental noise
Amplitude.Meanwhile the amplitude of environmental noise is prestored in processing unit 5, and electric with compression set 4 and sound acquisition module 2 respectively
Property connection, and processing unit 5 can obtain the noise amplitude that sound acquisition module 2 collects, and be calculated according to noise amplitude
The desired value of required acoustic resistance when the noise amplitude is decreased to default amplitude, then according to desired acoustic resistance value to acoustical cotton
3 decrement is controlled, and the noise amplitude entered in human ear is made to be reduced to default amplitude.To the external environment where user
When magnitude of sound is excessive, acoustical cotton 3 can be compressed by compression set 4, acoustic resistance be increased into preset value, and then human ear will be entered to
Lower noise reduces the injury to human ear to default amplitude.
Specifically, in the present embodiment, as shown in figure 4, compression set 4 includes by several magnet 41 and 42 groups of coil
At, wherein several magnet 41 are fixedly connected with acoustical cotton 3, and the outer surface of acoustical cotton 3 is located at around 3 ring of acoustical cotton, and coil 42 is used
It is wound in the acoustical cotton 3 for being equipped with several magnet 41, and generates magnetic field after powered up.In actual use, when
When the default decrement of acoustical cotton 3 is calculated in processing unit 5, moreover it is possible to be sent out according to the default decrement of acoustical cotton 3 to coil 42
The electric current for sending default size, according to the calculation formula F=BIL of magnetic field force, wherein F is magnetic field force, and B is magnetic induction intensity, and I is
Current strength, L are coil length, and the numerical value of parameter B, L of compression set 4 is fixed and invariable in cover 1, therefore only needs to adjust
The current strength passed through in nodel line circle 42 can be adjusted magnetic field force, also, the pressure of the size of current strength and acoustical cotton 3
The relationship of contracting amount can be obtained according to experiment measurement, and corresponding proportionate relationship is compiled to processing unit 5, so that processing unit
5 can give coil 42 according to required magnetic field force required for current strength.When the electricity in coil 42 by presetting size
When stream, the magnetic field force of default size is generated in cover 1, each magnet 41 is under the action of the magnetic field force of default size towards sound-absorbing
The mobile preset value in the direction of cotton 3, so that acoustical cotton 3, by compression predetermined amount, acoustic resistance is improved to default acoustic resistance, and then by noise amplitude
It is reduced to the default amplitude set in processing unit 5.
In addition, in the present embodiment, acoustical cotton 3 is column structure, and when the porosity for capableing of acoustical cotton 3 is bigger, is inhaled
Sonic system number is bigger, and sound absorption effect is also better.Specifically, it when sound enters in acoustical cotton 3, is generated in acoustical cotton 3
Diffusing reflection and refraction, meanwhile, the gap in interporal lacuna vibrates, the friction and air due to pore wall with the vibration of sound
Viscous force etc. enables significant component of sound to be converted into thermal energy and be dissipated, therefore, by adjusting the porosity of acoustical cotton 3,
And then the acoustic resistance of whole system can be adjusted, and then achieve the purpose that noise reduction.
In addition, it should be noted that, in the present embodiment, as shown in Figure 2 and Figure 3, axis of each magnet 41 around acoustical cotton 3
Line carries out ring and sets, meanwhile, cover 1 is respectively arranged with along the two sides of the axis direction of acoustical cotton 3 into sound mouth 11 and sound mouth 12,
Also, it is oppositely arranged on the two sides of cover 1 respectively into sound mouth 11 and sound mouth 12.Further, in order to which effective protection human ear is exempted from
By bite by mosquitos, extraneous factor is avoided to damage human ear, which may also include that the first waterproof closed into sound mouth 11 is saturating
Gas-bearing formation 6, the second waterproof ventilative layer 7 for closing sound mouth 12, can be right by the first waterproof ventilative layer 6 and the second waterproof ventilative layer 7
Human ear is protected.Specifically, the first waterproof ventilative layer 6 by two-layer nonwoven, be arranged in it is ventilative between two-layer nonwoven
Film composition, likewise, the second waterproof ventilative layer 7 is made of two-layer nonwoven, the ventilated membrane being arranged between two-layer nonwoven.Cause
It and can be while reducing environmental noise by the first waterproof ventilative layer 6 and the second waterproof ventilative layer 7, moreover it is possible to effectively avoid mosquito
Into the risk of ear canal, ear disease is reduced.Meanwhile first waterproof ventilative layer 6 and the second waterproof ventilative layer 7 also have it is anti-
Water function, so that user can also use in swimming or other moist environment, for example, when user wears during swimming
When wearing the earmuff, environmental noise can not only be reduced, also the foreign matter in water and water can be effectively prevent to enter ear canal, avoided to people
Ear damages.
Furthermore, during actual use, cover 1 may be alternatively provided as one or more, not limit specifically herein.Separately
Outside, noise reduction microphone can be used in sound processing module, thus can be carried out to the noise entered in cover 1 by noise reduction microphone
Noise reduction, is further effectively reduced the amplitude for the noise being delivered in human ear, preferably protects to human ear.Processing unit
5 can be used audio processing chip.
Preferably, in the present embodiment, as shown in Figure 2 and Figure 3, being provided with hard shell on the outside of acoustical cotton 3 and coil 42
Body 9, meanwhile, 9 outer layer of hard shell is additionally provided with flexible silica gel 8, thus can effectively promote user's usage comfort.Also, it is soft
Property silica gel 8 and the first air-permeable layer, the second air-permeable layer can not only prevent the foreign matters such as water and mosquito from entering ear canal, simultaneously, additionally it is possible to
The good air permeability for keeping earmuff, preferably protects human ear.
Specifically, when the default amplitude in processing unit 5 is 90 decibels, and extraneous ring is detected in sound acquisition module 2
When the magnitude of sound in border is greater than 90 decibels, the noise numerical value and audio that processing unit 5 is detected based on sound processing module are calculated
Method calculates noise amplitude and is reduced to required for default amplitude and it is expected acoustic resistance value, and then, processing unit 5 is needed for being calculated
After the expectation acoustic resistance value of acoustic resistance, control compression set 4 compresses the acoustical cotton 3 of predetermined amount, so that the noise being delivered in human ear
Amplitude is reduced to default amplitude, avoids damaging human ear, effective protection human ear.
Second embodiment of the invention is related to a kind of earmuff, and second embodiment is made on the basis of first embodiment
It is further improved, mainly thes improvement is that: in the present embodiment, earmuff further include: communication module is arranged in two ears
In the connector of cover, and communicated with subscriber terminal side.User can set default amplitude by subscriber terminal side, and by with
Family terminal side sets the default amplitude prestored in processing unit by communication module.For example, user is in subscriber terminal side
Default amplitude is set as 90 decibels, then when ambient noise amplitude is greater than 90 decibels, processing unit controls compression set for sound-absorbing
Cotton compresses predetermined amount, makes lower noise to 90 decibels；User can also set default amplitude as 80 decibels, equally in subscriber terminal side
, when ambient noise amplitude is greater than 80 decibels, processing unit controls compression set and acoustical cotton is compressed to predetermined amount, and will make an uproar
Sound amplitude is reduced to 80 decibels.Thus while being protected to human ear, additionally it is possible to it is different to be accustomed to selection according to user itself
Default amplitude, the further user-friendly earmuff.
In actual use, bluetooth receiving module or infrared receiving module etc. can be used in communication module, when communication module is adopted
When with bluetooth receiving module formula, subscriber terminal side has bluetooth sending module, thus can be to the pre- of earmuff by subscriber terminal side
If amplitude is adjusted, human ear is preferably protected.Also, communication module may also be arranged in any one cover, equally can
Realization is preset amplitude to noise and is adjusted, and for the setting position of communication module, does not limit specifically herein.
Third embodiment of the invention is related to a kind of noise-reduction method of earmuff, as shown in Fig. 6, Fig. 7, Fig. 8, wherein earmuff
Cover 1 in be provided with acoustical cotton 3 and compress acoustical cotton 3 compression set 4, and acoustical cotton 3 can in cover 1 manufacture sound
Resistance, and can be according to compression set 4 to the decrement of acoustical cotton 3, so that the acoustic resistance in cover 1 is changed, and then by noise width
Value is reduced to default amplitude.
Specifically, in the present embodiment, as shown in figure 5, noise-reduction method the following steps are included:
Step S101 is acquired extraneous environmental noise by sound acquisition module 2, and obtains the noise amplitude of environmental noise；
Step S102 is calculated according to noise amplitude is decreased to the desired acoustic resistance that default amplitude speed needs for the noise amplitude
Value；
For step S103 after the desired value of acoustic resistance is calculated, control compression set 4 compresses acoustical cotton 3, and single by processing
Member 5 controls decrement of the compression set 4 when compressing acoustical cotton 3 according to desired acoustic resistance value.
In addition, compressing the acoustical cotton 3 in control compression set 4, and according to the expectation resistance value to the compression set 4
In the step of decrement for compressing the acoustical cotton 3 is controlled, specifically include:
By processing unit 5 according to the expectation resistance value for the acoustic resistance being calculated, coil corresponding to the expectation acoustic resistance value is calculated
42 current values；
According to 42 current value of coil being calculated, electric current is provided from processing unit 5 to coil 42.
Through the above it is not difficult to find that since processing unit 5 can make an uproar according to the environment that sound acquisition module 2 detects
Sound amplitude calculates the desired value that the noise amplitude is decreased to acoustic resistance required for default amplitude, acoustic resistance then is being calculated
Desired value after, electric current of corresponding size is provided from processing unit 5 to coil 42, so that generating the magnetic of default size in cover 1
, and then drive each magnet 41 under the action of a magnetic force, acoustical cotton 3 is compressed, the noise amplitude for entering to human ear is made
It is reduced to default amplitude, reaches the protection to human ear.
Specifically, in the present embodiment, as shown in figure 8, compression set 4 includes: coil 42 and several magnet 41,
In, several magnet 41 are fixedly connected with acoustical cotton 3, and the outer surface of acoustical cotton 3 is located at around 3 ring of acoustical cotton, coil 42 for pair
The acoustical cotton 3 for being equipped with several magnet 41 is wound, and generates magnetic field after powered up.In actual use, work as processing
When the default decrement of acoustical cotton 3 is calculated in unit 5, moreover it is possible to be sent according to the default decrement of acoustical cotton 3 to coil 42 pre-
If the electric current of size, according to the calculation formula F=BIL of magnetic field force, wherein F is magnetic field force, and B is magnetic induction intensity, and I is electric current
Intensity, L are coil length, and the value of parameter B, L of compression set 4 is fixed and invariable in cover 1, therefore only needs regulating winding
The current strength passed through in 42 can be adjusted magnetic field force, also, the size of current strength and the decrement of acoustical cotton 3
Relationship can be obtained according to experiment measurement, and corresponding proportionate relationship be compiled to processing unit 5, enable processing unit 5
Current strength required for giving coil 42 according to required magnetic field force.When the electric current in coil 42 by presetting size,
The magnetic field force of default size is generated in cover 1, each magnet 41 is under the action of the magnetic field force of default size towards acoustical cotton 3
Preset value is moved in direction, so that acoustical cotton 3, by compression predetermined amount, acoustic resistance is improved to default acoustic resistance, and then noise amplitude is reduced
The default amplitude set into processing unit 5.
It is not difficult to find that present embodiment is system embodiment corresponding with first embodiment, present embodiment can be with
First embodiment is worked in coordination implementation.The relevant technical details mentioned in first embodiment still have in the present embodiment
Effect, in order to reduce repetition, which is not described herein again.Correspondingly, the relevant technical details mentioned in present embodiment are also applicable in
In first embodiment.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiment party of the invention
Formula, and in practical applications, can to it, various changes can be made in the form and details, without departing from spirit and model of the invention
It encloses.
Claims (11)
1. a kind of earmuff, including at least one cover, which is characterized in that further include:
Sound acquisition module obtains the noise amplitude of environmental noise for acquiring environmental noise；
Acoustical cotton is set in the cover, for manufacturing acoustic resistance in the cover；
Compression set is set in the cover, for compressing the acoustical cotton, changes the intracorporal acoustic resistance of cover；
Processing unit is electrically connected with the compression set and the sound acquisition module respectively, and prestores the pre- of environmental noise
If amplitude；
The processing unit is counted for obtaining the noise amplitude that the sound acquisition module obtains, and according to the noise amplitude
The expectation resistance value of acoustic resistance needed for the noise amplitude is decreased to the default amplitude is calculated, the processing unit is also used to according to calculating
The obtained expectation resistance value controls decrement of the compression set when compressing the acoustical cotton.
2. earmuff according to claim 1, which is characterized in that the compression set includes:
Several magnet carry out ring around the acoustical cotton and set, and are fixed with the acoustical cotton；
Coil is wound the acoustical cotton for being equipped with several magnet, each described for generating magnetic field after powered up
Magnet is for, towards the movement of the direction of the acoustical cotton, compressing the acoustical cotton under the magnetic fields of the coil；
The coil is also electrically connected with the processing unit, and the processing unit is also used to the phase according to the acoustic resistance being calculated
Resistance value is hoped to export the electric current of the corresponding expectation resistance value size to the coil.
3. earmuff according to claim 2, which is characterized in that the acoustical cotton be column structure, and each magnet around
The axis ring of the acoustical cotton is set, and the cover is respectively provided with into sound mouth and goes out along the two sides of the axis direction of the acoustical cotton
Sound mouth.
4. earmuff according to claim 3, which is characterized in that the earmuff further include: closing is described into the first of sound mouth
Second waterproof ventilative layer of waterproof ventilative layer, the closing sound mouth.
5. earmuff according to claim 4, which is characterized in that first waterproof ventilative layer and second waterproof and breathable
Layer includes: at least two-layer nonwoven, the ventilated membrane being arranged between two layers non-woven fabrics.
6. earmuff according to claim 1, which is characterized in that the sound acquisition module is noise reduction microphone.
7. earmuff according to claim 1, which is characterized in that the earmuff further include:
Communication module is electrically connected with the processing unit, is also communicated with the subscriber terminal side；
The subscriber terminal side is used to pass through default width of the communication module to the environmental noise prestored in the processing unit
Value is set.
8. earmuff as claimed in any of claims 1 to 7, which is characterized in that there are two the cover is set, and it is described
Earmuff further include: the connector of two covers of connection, the sound acquisition module and the processing unit are arranged at the company
On fitting.
9. earmuff according to claim 8, which is characterized in that the connector is that neck hanging type connector or wear-type connect
Part.
10. a kind of noise-reduction method of earmuff, which is characterized in that be equipped with acoustical cotton in the cover of the earmuff and compress the sound-absorbing
The compression set of cotton；The acoustical cotton is also used to for manufacturing acoustic resistance in the cover when being compressed by the compression set
Change the acoustic resistance, the noise-reduction method the following steps are included:
Extraneous environmental noise is acquired, the noise amplitude of environmental noise is obtained；
According to the noise amplitude, the expectation resistance value of acoustic resistance needed for the noise amplitude is decreased to default amplitude is calculated；
After the expectation resistance value of required acoustic resistance is calculated, controls the compression set and compress the acoustical cotton, and according to described
It is expected that resistance value controls decrement of the compression set when compressing the acoustical cotton.
11. the noise-reduction method of earmuff according to claim 10, which is characterized in that the compression set includes:
Several magnet carry out ring around the acoustical cotton and set, and are fixed with the acoustical cotton；
Coil is wound the acoustical cotton for being equipped with several magnet, each described for generating magnetic field after powered up
Magnet is for, towards the movement of the direction of the acoustical cotton, compressing the acoustical cotton under the magnetic fields of the coil；
The control compression set compresses the acoustical cotton, and is being compressed according to the expectation resistance value to the compression set
It is specifically included in the step of decrement of the acoustical cotton is controlled:
According to the expectation resistance value for the acoustic resistance being calculated, continue to calculate coil corresponding to the expectation resistance value obtaining electric current value；
It is powered with the current value being calculated to the coil.
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|---|---|---|---|
| CN201811424200.4A CN109495801B (en) | 2018-11-27 | 2018-11-27 | Earmuff and noise reduction method of earmuff |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811424200.4A CN109495801B (en) | 2018-11-27 | 2018-11-27 | Earmuff and noise reduction method of earmuff |
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| CN109495801B CN109495801B (en) | 2020-11-06 |
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| CN109495801B (en) | 2020-11-06 |
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