CN207652630U - A kind of noise reduction microphone unit and smart television - Google Patents
A kind of noise reduction microphone unit and smart television Download PDFInfo
- Publication number
- CN207652630U CN207652630U CN201721906427.3U CN201721906427U CN207652630U CN 207652630 U CN207652630 U CN 207652630U CN 201721906427 U CN201721906427 U CN 201721906427U CN 207652630 U CN207652630 U CN 207652630U
- Authority
- CN
- China
- Prior art keywords
- microphone
- noise reduction
- sound
- television
- microphone unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model provides a kind of noise reduction microphone unit and smart television, the noise reduction microphone unit includes sound baffle, preceding microphone, rear microphone, computing circuit and output interface, the smart television passes through preceding microphone and the acoustic pressure difference of rear microphone and the processing of psophometric voltage, judge voice phonation time, to be cut off to background environment noise, only retain voice, when carrying out recording or voice dialogue, there is more good sound expression effect.
Description
Technical field
The utility model is related to arrive noise reduction intelligent television field, and in particular to a kind of noise reduction microphone unit and intelligence electricity
Depending on.
Background technology
Microphone, scientific name are microphone, are the energy conversion devices that voice signal is converted to electric signal.Daily life
In, when using microphone, microphone catches the voice signal caught, and to be usually noise be superimposed with voice.Microphone is using
When, user can speak close to microphone, and acoustic pressure can substantially exceed the acoustic pressure of background sound, for the sense of hearing of sound, this
When background sound on voice influence it is smaller.Therefore, if the sound of microphone catch grab the time can be complete with the phonation time of voice
When coincidence, influence of the noise to voice is smaller.
But in real life, when in use, voice always will appear pause and interval to microphone, therefore, in voice sounding
Interval in, background noise can seem especially prominent.
Background noise when therefore, it is necessary to for voice interval carries out noise reduction, and the back of the body is brought into when in use to solve microphone
The problem of scape noise.
Utility model content
In order to overcome described problem, the utility model provides a kind of noise reduction microphone unit and smart television, by preceding
Microphone and the acoustic pressure difference of rear microphone and the processing of psophometric voltage, judge voice phonation time, to background environment
Noise is cut off, and voice is only retained, and when carrying out recording or voice dialogue, has more good sound expression effect.
Corresponding the utility model provides a kind of noise reduction microphone unit, the noise reduction microphone unit include sound baffle,
Preceding microphone, rear microphone, computing circuit and output interface；
The preceding microphone and the rear microphone are separately positioned on sound baffle both sides；
The input terminal of the computing circuit is connect with the preceding microphone and the postposition Mike respectively, and output end is used for
Export the acoustic pressure difference of the preceding microphone and the postposition Mike；
The output interface also output with the preceding microphone, the rear microphone, the computing circuit respectively
End connection.
Preferred embodiment, the computing circuit are subtraction circuit.
Preferred embodiment, the sound baffle are made of porosity sound-absorbing material.
Preferred embodiment, the preceding microphone and the rear microphone are Electret Condencer Microphone.
Preferred embodiment, the noise reduction microphone unit includes microphone case, and the sound baffle is fixed on described
In the middle part of microphone case, the preceding microphone and rear microphone are separately fixed at the microphone case both ends.
Correspondingly, the utility model additionally provides a kind of smart television, which includes television enclosure, liquid crystal mould
Any one noise reduction microphone unit described in block, processor, reservoir and claim 1 to 5；
The noise reduction microphone unit is installed on the television enclosure.
Preferred embodiment, the noise reduction microphone use separate structure, the preceding microphone to be set to the electricity
Depending on shell front panel, the rear panel in the television enclosure is arranged in the rear microphone.
Preferred embodiment, the noise reduction microphone use integral structure, and the microphone case both ends are each passed through
The television enclosure front panel and rear panel.
The sound baffle of preferred embodiment, the noise reduction microphone unit is the television enclosure.
The utility model provides a kind of noise reduction microphone unit and smart television, passes through preceding microphone and postposition Mike
The acoustic pressure difference of wind and the processing of psophometric voltage, judge voice phonation time, to be cut off to background environment noise, only retain
Voice has more good sound expression effect when carrying out recording or voice dialogue.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 shows the structural schematic diagram of the noise reduction microphone unit of the utility model embodiment；
Fig. 2 shows the circuit diagrams of the noise reduction microphone unit of the utility model embodiment；
Fig. 3 shows the circuit diagram of the smart television of the utility model embodiment.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
The all other embodiment obtained, shall fall within the protection scope of the present invention.
The utility model embodiment provides a kind of noise reduction microphone unit, which includes preposition Mike
Wind 2, rear microphone 3, sound baffle 1 and computing circuit.
Fig. 1 shows the position view of the utility model embodiment microphone harmony baffle 1.Preceding microphone 2 is with after
Microphone 3 is arranged in the both sides of sound baffle 1, in specific implementation, for the preceding microphone 2 of fixation and rear microphone 3,
Preceding microphone 2 and rear microphone 3 can be fixed on a microphone case 4, sound baffle 1 is fixed on 4 axis of microphone case
To middle part, it should be noted that should ensure that has preferable sound insulation value between preceding microphone 2 and rear microphone 3.
Sound baffle 1 can select Multihollow sound-absorbing material to manufacture.Sound-absorbing material is to the reflection very little of incident acoustic energy, this meaning
It acoustic energy and is easily accessible and penetrates this material.The material of this material should be porous, loose and ventilative, in technique usually
It is with threadiness, graininess or expanded material to form cellular structure；Structure feature be have in material it is a large amount of, pass through mutually
It is logical, from table to inner micropore.When sound wave incident is to porous material surface, cause the air vibration in micropore, due to friction
The viscous resistance and conduction of heat of resistance and air convert quite a few acoustic energy to thermal energy, to play sound absorption.
Compared with the acoustic materials such as steel plate, sound-absorbing material will not reflect sound wave, and have good sound-absorbing effect, and voice is made to exist
The acoustic pressure gap bigger of preceding microphone and rear microphone.
Electret Condencer Microphone can be used in preceding microphone 2 and rear microphone 3.Condenser microphone is a kind of current performance
Relatively good microphone classification, its working centre are capacitors, and condenser microphone is worked by the variation of capacitance,
Mainly it is made of vibrating diaphragm, rigid plate, power supply and load resistance etc..Its operation principle is when diaphragm is pressed by sound wave
Power, and when being vibrated with the size of pressure and the difference of frequency, the capacitance between diaphragm pole plate just changes.It is same with this
When, the charge on pole plate changes therewith, to make the also respective change of the electric current in circuit, also just has corresponding electricity on load resistance
Pressure output, is converted so as to complete acoustic-electric.
A kind of structure of Electret Condencer Microphone shown in FIG. 1 for the utility model embodiment, including power supply, vibrating diaphragm
201, rigid plate 202, load resistance 203 and amplifier 204；Supply voltage is invariable, and vibrating diaphragm 201 is driven by sound
After dynamic, the distance between rigid plate 202 dynamic change, so as to cause the capacitance between diaphragm 201 and rigid plate 202
It changes, corresponding change occurs for size of current in circuit, and 203 both end voltage of load resistance changes correspondingly；By catch grab it is negative
Carry 203 both end voltage of resistance, you can catch the sound variation for grabbing sound wave.
Fig. 2 shows the computing circuit circuit diagrams of the utility model embodiment.The psophometric voltage U1 of preceding microphone 2 and
The psophometric voltage U2 of microphone 3 accesses the input terminal of operational amplifier after impedance R1 and R2 respectively afterwards.Wherein, preceding microphone
2 acoustic-electric volt circuit is incorporated to primary Ioops between impedance R1 and operational amplifier, and the circuit is from the rear ends impedance R1 through feedback resistance
After RF, import to the output end of operational amplifier；The acoustic-electric volt circuit of microphone 3 is between impedance R2 and operational amplifier afterwards
It is incorporated to an earth-return circuit, which is grounded from the rear ends impedance R2 through impedance R3.When R1, R2, R3 and RF meet relationship
When, the output voltage of computing circuitWhen R2=R1 is, then U3=U2-U1.
In conjunction with the utility model embodiment shown in FIG. 1 noise reduction microphone unit schematic diagram it is found that due to baffle
Presence, for human body when close to the position sounding of preceding microphone 2, rear microphone 3 catches the voice acoustic pressure caught and preposition wheat
Gram wind 2 catches that the voice acoustic pressure difference caught is larger, at this point, the output voltage U3 values of computing circuit are larger；And ambient background noise
It is then microphone 2 or rear microphone 3 before principle, the propagation of sound farther out, and passes through the multiple of environment due to distance
It is almost equivalent that reflection, preceding microphone 2 and rear microphone 3, which catch the ambient background noise sound pressure caught, at this point, fortune
The output voltage U3 values for calculating circuit are smaller；When considering further that voice generates, the influence caused by ambient background noise is not easy to listen
Go out, therefore, when U3 is less than the filter value, can show that human body does not send out voice by setting an appropriate filter value,
The sound at the moment can be cut off；When U3 is more than the filter value, show that human body is sending out voice, the sound at the moment gives
Retain.
In specific implementation, it is contemplated that the development of present intelligent appliance, processor ability is very powerful, for reduced cost,
Acoustic processing more than being carried out in the equipment that the noise reduction microphone unit of the utility model embodiment is applied, this practicality are new
Type embodiment is explained using smart television as carrier.
It should be noted that for the ease of installation, there are one 5pin for the noise reduction microphone setting of the utility model embodiment
Output interface, which is contact pin 5, the output end of microphone 2, postposition wheat before which is respectively connected to
The feeder ear and ground terminal of gram output end of wind 3, the output end of computing circuit, preceding microphone 2 and rear microphone 3, this is inserted
5 each needle of needle is identified as voltage U1, voltage U2, voltage U3, input power V+, ground connection GND successively.
Fig. 3 shows the electrical block diagram of the utility model embodiment smart television.The utility model embodiment
Smart television includes television enclosure, Liquid Crystal Module, processor, reservoir, electric power management circuit；Liquid Crystal Module insertion installation is extremely
On the front panel of television enclosure, on processor, the circuit board of reservoir and electric power management circuit setting inside the housing；This practicality
The smart television of new embodiment only lists parts related with the noise reduction microphone unit of the utility model embodiment,
Remaining parts are not introduced.
It should be noted that in specific implementation, it can be by the TV of noise reduction microphone unit integral installation to smart television
On shell, preceding microphone 2 is located at the front panel of television enclosure, and rear microphone 3 is located on the rear panel of television enclosure, also may be used
To be designed using seperated noise reduction microphone unit according to the structure of smart television, specifically, due to the utility model embodiment
Smart television television enclosure and Liquid Crystal Module therefore may be used as serving as noise reduction microphone unit in flat box like structure
Gear soundboard, correspondingly, preceding microphone 2 and rear microphone 3 are mounted respectively on the front panel and rear panel of television enclosure,
Since preceding microphone 2 and rear microphone 3 are designed using seperated, in the front panel of television enclosure or the peace of rear panel
Holding position can be designed according to demand, and effect is more good in practical application.
It can be seen that by the embodiment of the above noise reduction microphone unit, in order to lower the cost of noise reduction microphone unit, dropping
It makes an uproar the circuit not being provided in microphone unit for acoustic processing, which can be by the intelligence of the utility model embodiment
The processor of TV is completed.Specifically, storing filter value set by user in reservoir, which is mainly used for passing through fortune
The comparison for calculating the output voltage U3 and the filter value of circuit, judges voice phonation time, and by the environment outside voice time of origin
Background noise is deleted.
Processor synchronization receives voltage U1, U2 and U3, it is assumed that certain moment U3 values are more than the filter value, then show this
When be voice in sounding, the voice data of U1 and U2 can directly store up in storage to reservoir or after superimposed without processing
It deposits into reservoir, to obtain clearer sound；Assuming that certain moment U3 values are less than the filter value, then show that sound at this time is
The voice data of ambient background noise, U1 and U2 should be refused to retain, and be embodied in, and the psophometric voltage at the moment is 0.In addition to preserving
Other than reservoir, since the processor speed of service is exceedingly fast, U1, U2, U3 are believed that with synchronism, and hence it is also possible to directly
By voice data for exporting, the processing of next stage is carried out, such as voice dialogue is sent.In specific implementation, acoustic pressure data
Conversion also relates to the conversion of analog signal and digital signal, since modulus/D/A converting circuit technology is more mature, this practicality
New embodiment is no longer introduced.
Electric power management circuit then is used to be responsible for the power supply of the power supply and noise reduction microphone unit of smart television, needs to illustrate
It is that the voltage needed for V+ is constant pressure, to ensure Electret Condencer Microphone signal stabilization.On the other hand, due to the utility model reality
The preceding microphone 2 and rear microphone 3 for applying example are powered using same power pin, and poor by subtraction circuit output
Threshold voltage can be by adjusting proportionality coefficient when supply voltage differenceValue, make the filtering in the difference and reservoir of U3
It is worth corresponding, the repetition of filter value is avoided to adjust, for the equipment of different model, there is good practicability and convenience.
The utility model embodiment provides a kind of noise reduction microphone and smart television, passes through preceding microphone and postposition wheat
Gram the acoustic pressure difference of wind and the processing of psophometric voltage, judge voice phonation time, to be cut off to background environment noise, only protect
Voice is stayed, when carrying out recording or voice dialogue, there is more good sound expression effect.
A kind of noise reduction microphone unit and smart television provided above to the utility model embodiment has carried out in detail
It introduces, specific case used herein is expounded the principles of the present invention and embodiment, above example
Illustrate the method and its core concept for being merely used to help understand the utility model；Meanwhile for the general technology people of this field
Member, according to the thought of the utility model, there will be changes in the specific implementation manner and application range, in conclusion this
Description should not be construed as a limitation of the present invention.
Claims (9)
1. a kind of noise reduction microphone unit, which is characterized in that including sound baffle, preceding microphone, rear microphone, computing circuit
And output interface；
The preceding microphone and the rear microphone are separately positioned on sound baffle both sides；
The input terminal of the computing circuit is connect with the preceding microphone and the postposition Mike respectively, and output end is for exporting
The acoustic pressure difference of the preceding microphone and the postposition Mike；
Output end of the output interface also respectively with the preceding microphone, the rear microphone, the computing circuit connects
It connects.
2. noise reduction microphone unit as described in claim 1, which is characterized in that the computing circuit is subtraction circuit.
3. noise reduction microphone unit as described in claim 1, which is characterized in that the sound baffle is by porosity sound-absorbing material system
At.
4. noise reduction microphone unit as described in claim 1, which is characterized in that the preceding microphone and the postposition Mike
Wind is Electret Condencer Microphone.
5. noise reduction microphone unit as described in claim 1, which is characterized in that the noise reduction microphone unit includes microphone
Shell, the sound baffle are fixed in the middle part of the microphone case, and the preceding microphone and rear microphone are separately fixed at
The microphone case both ends.
6. a kind of smart television, which is characterized in that including television enclosure, Liquid Crystal Module, processor, reservoir and claim 1
To any one noise reduction microphone unit described in 5；
The noise reduction microphone unit is installed on the television enclosure.
7. smart television as claimed in claim 6, which is characterized in that the noise reduction microphone uses separate structure, before described
Microphone is set to the television enclosure front panel, and the rear panel in the television enclosure is arranged in the rear microphone.
8. smart television as claimed in claim 6, which is characterized in that the noise reduction microphone uses integral structure, the wheat
Gram wind shell both ends are each passed through the television enclosure front panel and rear panel.
9. any one smart television as described in claim 6~8, which is characterized in that the sound of the noise reduction microphone unit
Baffle is the television enclosure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721906427.3U CN207652630U (en) | 2017-12-29 | 2017-12-29 | A kind of noise reduction microphone unit and smart television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721906427.3U CN207652630U (en) | 2017-12-29 | 2017-12-29 | A kind of noise reduction microphone unit and smart television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207652630U true CN207652630U (en) | 2018-07-24 |
Family
ID=62876996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721906427.3U Expired - Fee Related CN207652630U (en) | 2017-12-29 | 2017-12-29 | A kind of noise reduction microphone unit and smart television |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207652630U (en) |
-
2017
- 2017-12-29 CN CN201721906427.3U patent/CN207652630U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105338459A (en) | MEMS (Micro-Electro-Mechanical System) microphone and signal processing method thereof | |
| CN103945076B (en) | Real time audio echo and background noise reduction for a mobile device | |
| CN108597507A (en) | Far field phonetic function implementation method, equipment, system and storage medium | |
| CN206212090U (en) | A kind of portable voice harvester and mobile terminal containment vessel | |
| CN101998216A (en) | Loudspeaker and portable electronic device | |
| CN201054780Y (en) | Automatic noise reduction earphone | |
| CN103199602A (en) | Mobile terminal charging system and mobile terminal charging method | |
| CN207652630U (en) | A kind of noise reduction microphone unit and smart television | |
| CN203504716U (en) | Three-terminal noise-reduction microphone | |
| CN203181217U (en) | Piezoelectric ceramic bone-conduction microphone | |
| CN105025422B (en) | vibration sounding structure and terminal | |
| CN204697287U (en) | Piezoelectric speaker | |
| CN203708066U (en) | Mobile phone charged in voice-activated mode | |
| CN203181214U (en) | Cantilever beam type mounting structure of piezoelectric ceramic bone conduction receiver | |
| CN106419954B (en) | One kind being suitable for stethoscopic vibration restoring method | |
| CN201222804Y (en) | Earphone for bone conduction apparatus | |
| CN113808566B (en) | Vibration noise processing method and device, electronic equipment and storage medium | |
| CN201422161Y (en) | capacitor microphone | |
| CN207135242U (en) | A kind of wireless microphone with intelligent noise removal function | |
| CN207638826U (en) | Microphone | |
| CN105390282B (en) | A kind of capacity cell with silencing apparatus | |
| CN205303846U (en) | Musical instrument connecting wire with function is received to bluetooth | |
| CN205454015U (en) | Transaudient formula microphone device of osteoacusis | |
| CN2691198Y (en) | Digital sund plager with vibrative function | |
| CN203632824U (en) | Square sound box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180724 Termination date: 20201229 |