CN2588714Y - Noise-eliminating earphone - Google Patents
Noise-eliminating earphone Download PDFInfo
- Publication number
- CN2588714Y CN2588714Y CN 02227931 CN02227931U CN2588714Y CN 2588714 Y CN2588714 Y CN 2588714Y CN 02227931 CN02227931 CN 02227931 CN 02227931 U CN02227931 U CN 02227931U CN 2588714 Y CN2588714 Y CN 2588714Y
- Authority
- CN
- China
- Prior art keywords
- compensation amplifier
- earphone
- noise
- gain compensation
- pcb board
- 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
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model relates to the technical field of earphones, particularly a pair of earphones with the function of noise eliminating. A PCB board in the earphone is provided with a gain compensation amplifier, a phase compensation amplifier, a filter and a reverse driver. A microphone is connected with the gain compensation amplifier on the PCB board, the gain compensation amplifier is connected with the phase compensation amplifier which is connected with the reverse driver through the filter, and the output terminal of the reverse driver is connected with a loudspeaker of the earphone. When the utility model is used, external noise is received by the microphone through gain compensation, the loudspeaker driven by the reverse driver sends reverse noise of similar amplitude and contrary phase with the external noise, and two sound waves counteracts mutually to achieve the purpose of noise eliminating.
Description
Technical field:
The utility model relates to the earphone technical field, refers in particular to a kind of earphone that the de-noising function is arranged.
Background technology:
Along with people's living standard improves constantly, people are also more and more higher to the requirement of spiritual life level, teenager particularly, they mostly like enjoy music in leisure time after dinner, and under the situation that nobody bothers, people have on earphone silently enjoy music be the modes that many teenagers extensively adopt.And the earphone that uses at present is the function that does not have de-noising mostly, and the sound that earphone sends during use is subjected to external noise jamming easily, influences tonequality.Have noise cancelling headphone subsequently, it adopts physics mode that earphone is isolated from the outside, thereby reducing ambient noise enters in the earphone, but this class earphone is to finish the sound insulation function with physical structure, the earphone volume of making is bigger, is sandwiched in during use on the head too in heaviness, and be the sound insulation of physics formula simultaneously, so the chucking power that earphone imposes between two ears is excessive, uncomfortable and sultry sensation is arranged for the user when wearing; Besides the sound insulation of physics formula still has many noises to bleed in the ear, and the effect of sound insulation still is undesirable.
Summary of the invention:
The purpose of this utility model is to provide a kind of can send the antinoise ripple and external noise offsets, and allows the de-noising earphone of the clearer reception and registration of voice signal, and not only it is simple in structure, and volume is less, uses and carries all very light.
The utility model is achieved by the following technical solution: it includes earphone and is arranged at its interior microphone, loudspeaker, pcb board, pcb board is provided with gain compensation amplifier, phase compensation amplifier, filter and reverse driven, microphone is connected with gain compensation amplifier on the pcb board, the gain compensation amplifier is connected with the phase compensation amplifier, the phase compensation amplifier is connected with reverse driven by filter, and the output of reverse driven is connected with loudspeaker.
Described phase compensation amplifier includes resistance R and capacitor C, and both are connected in series; And wherein the other end of resistance R is connected with filter, and the output of capacitor C is connected with the output of reverse driven.
After adopting such structure, drive loudspeaker by reverse driven and send the antinoise ripple, the amplitude of this antinoise ripple is close with the amplitude of external noise, and phase place is opposite, makes two sound waves cancel out each other, thereby reaches good de-noising effect; Simultaneously the assembling volume of earphone is less, and can adopt open by design, will the ear complete closed, thereby wear Shi Buhui and produce and do not accommodate feeling of oppression and heat.
Description of drawings:
Accompanying drawing 1 is a functional-block diagram of the present utility model;
Accompanying drawing 2 is an oscillogram of the present utility model;
Accompanying drawing 3 is a circuit diagram of the present utility model;
Accompanying drawing 4 is wherein a kind of embodiment circuit diagram of the present utility model;
Accompanying drawing 5 is an another kind of embodiment circuit diagram of the present utility model;
Accompanying drawing 6 is an outline drawing of the present utility model;
Accompanying drawing 7 is the another kind of outline drawing of implementing of the present utility model.
Embodiment:
See accompanying drawing 1～7, in earphone 1, be provided with microphone 2, loudspeaker 3, pcb board 4, and pcb board 4 is provided with gain compensation amplifier 41, phase compensation amplifier 42, filter 43 and reverse driven 44, microphone 2 is connected with gain compensation amplifier 41 on the pcb board 4, gain compensation amplifier 41 is connected with phase compensation amplifier 42, and phase compensation amplifier 42 is connected with reverse driven 44 by filter 43, the output of reverse driven 44 is connected with loudspeaker 3, phase compensation amplifier 42 includes a resistance R and a capacitor C, and both are connected in series; And wherein the other end of resistance R is connected with filter 43, and the output of capacitor C is connected with the output of reverse driven 44, and reverse driven 44 is arranged in the integrated circuit U.
During use, hang on the ear, can use earphone 1 by the hook on the earphone 1 11.When earphone 1 is in running order, the microphone 2 that is arranged on the earphone 1 will receive ambient noise 5, and noise 5 converted to the gain compensation amplifier 41 that sends to behind the analog electrical signal on the pcb board 4, analog electrical signal provides gain compensation through gain compensation amplifier 41, the signal of telecommunication amplifies, the signal of telecommunication after the amplification provides phase compensation through phase compensation amplifier 42 again, then noise is eliminated through filter 43, drive loudspeaker 3 by reverse driven 44 at last and send antinoise ripple 6, sound wave 6 is close with the amplitude of former noise sound wave 5, phase place is opposite, therefore two sound waves in earphone 1 promptly can major part be cancelled out each other, and reduce the noise of 7 uppicks of ear.And the noise 8 that residue is not cancelled is accepted by microphone 2, balances out again through behind the gain compensation once more, and so repetitive cycling can be with the noise eliminating of the overwhelming majority, and people's ear is also just listened to less than external noise, has reached the purpose of de-noising.
Circuit shown in the accompanying drawing 5 which is provided with the circuit that connects battery case, so that more convenient user carries and use earphone.
Claims (2)
1, a kind of de-noising earphone, include earphone (1) and be arranged at its interior microphone (2), loudspeaker (3), pcb board (4), microphone (2) and loudspeaker (3) all are connected with pcb board (4) by lead, it is characterized in that: pcb board (4) is provided with gain compensation amplifier (41), phase compensation amplifier (42), filter (43) and reverse driven (44), microphone (2) is connected with gain compensation amplifier (41) on the pcb board (4), gain compensation amplifier (41) is connected with phase compensation amplifier (42), and phase compensation amplifier (42) is connected with reverse driven (44) by filter (43), and the output of reverse driven (44) is connected with loudspeaker (3).
2, a kind of de-noising earphone according to claim 1, it is characterized in that: described phase compensation amplifier (42) includes resistance R and capacitor C, and both are connected in series; And wherein the other end of resistance R is connected with filter (43), and the output of capacitor C is connected with the output of reverse driven (44).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02227931 CN2588714Y (en) | 2002-05-31 | 2002-05-31 | Noise-eliminating earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02227931 CN2588714Y (en) | 2002-05-31 | 2002-05-31 | Noise-eliminating earphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2588714Y true CN2588714Y (en) | 2003-11-26 |
Family
ID=33704614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02227931 Expired - Fee Related CN2588714Y (en) | 2002-05-31 | 2002-05-31 | Noise-eliminating earphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2588714Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1930859B (en) * | 2004-02-09 | 2010-04-21 | Gn奈康有限公司 | An amplifier coupler coupled between a telephone and a headset |
| CN102118667A (en) * | 2009-12-31 | 2011-07-06 | 歌尔声学股份有限公司 | Unsealed earplug-type headset, and device and method for enhancing voice of receiving end |
| CN101304621B (en) * | 2007-04-19 | 2012-01-04 | 索尼株式会社 | Noise reducing apparatus and audio regeneration apparatus |
| WO2012022220A1 (en) * | 2010-08-20 | 2012-02-23 | Li Xiao | Noise reduction headphones and method for reducing headphone noise and distortion |
| CN101714014B (en) * | 2008-10-08 | 2012-06-13 | 英业达股份有限公司 | Computer system and method for reducing computer system noise |
| WO2012159380A1 (en) * | 2011-05-20 | 2012-11-29 | 中兴通讯股份有限公司 | Device and method for reducing wind noise for mobile terminals |
| CN102918585A (en) * | 2011-04-06 | 2013-02-06 | 松下电器产业株式会社 | Active noise control device |
| CN104860163A (en) * | 2014-02-20 | 2015-08-26 | 株式会社日立制作所 | Elevator Device And Noise Reducing Method |
-
2002
- 2002-05-31 CN CN 02227931 patent/CN2588714Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1930859B (en) * | 2004-02-09 | 2010-04-21 | Gn奈康有限公司 | An amplifier coupler coupled between a telephone and a headset |
| CN101304621B (en) * | 2007-04-19 | 2012-01-04 | 索尼株式会社 | Noise reducing apparatus and audio regeneration apparatus |
| CN101714014B (en) * | 2008-10-08 | 2012-06-13 | 英业达股份有限公司 | Computer system and method for reducing computer system noise |
| CN102118667A (en) * | 2009-12-31 | 2011-07-06 | 歌尔声学股份有限公司 | Unsealed earplug-type headset, and device and method for enhancing voice of receiving end |
| WO2011079722A1 (en) * | 2009-12-31 | 2011-07-07 | 歌尔声学股份有限公司 | Nonenveloped earplug type earphone, device and method for enhancing sound at its earpiece |
| CN102118667B (en) * | 2009-12-31 | 2016-05-25 | 歌尔声学股份有限公司 | Non-enclosed ear inserting type earphone and callee speech sound enhancement device thereof |
| WO2012022220A1 (en) * | 2010-08-20 | 2012-02-23 | Li Xiao | Noise reduction headphones and method for reducing headphone noise and distortion |
| CN102918585A (en) * | 2011-04-06 | 2013-02-06 | 松下电器产业株式会社 | Active noise control device |
| CN102918585B (en) * | 2011-04-06 | 2015-07-22 | 松下电器产业株式会社 | Active noise control device |
| WO2012159380A1 (en) * | 2011-05-20 | 2012-11-29 | 中兴通讯股份有限公司 | Device and method for reducing wind noise for mobile terminals |
| CN104860163A (en) * | 2014-02-20 | 2015-08-26 | 株式会社日立制作所 | Elevator Device And Noise Reducing Method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |