CN201854396U - Head-wearing noise reduction earphone - Google Patents
Head-wearing noise reduction earphone Download PDFInfo
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- CN201854396U CN201854396U CN2010205885719U CN201020588571U CN201854396U CN 201854396 U CN201854396 U CN 201854396U CN 2010205885719 U CN2010205885719 U CN 2010205885719U CN 201020588571 U CN201020588571 U CN 201020588571U CN 201854396 U CN201854396 U CN 201854396U
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Abstract
The utility model discloses a head-wearing noise reduction earphone which comprises a noise reduction device arranged in an earphone main body. The noise reduction device comprises a microphone for collecting sound and a circuit amplifier; the sound collected by the microphone passes through the circuit amplifier through an operational amplifier circuit; sound signals passing through the circuit amplifier are divided into two ways, wherein, one way of signals is directly led to a phase-switching device, and the other way of signals arrives at the phase-switching device via a reverse amplifier; and the two ways of signals meet to be offset. The head-wearing noise reduction earphone disclosed by the utility model has a good noise reduction effect; and the prices of used elements are low, so that the head-wearing noise reduction earphone costs low and is suitable for production. Compared with other noise reduction earphones, the head-wearing noise reduction earphone requires low cost, consumes low energy, uses the commonly used elements in the market, saves working procedures, is very simple and convenient to process, operate, control and use, is suitable for batch production, and has a much better noise reduction effect than other noise reduction earphones.
Description
Technical field
The utility model relates to a kind of wear-type noise cancelling headphone.
Background technology
We know that the modern likes being with earphone to listen to the music, but in very noisy environment, the extraneous noise meeting and the sound of earphone mix, and do not reach the effect of listening to the music, and melodious music also becomes flat and insipid again.For example: at the train station, bus station, supermarket, party or the like.We just think if can be noise removing, and don't can influence normal music, and that just can set aside all worries in noisy environment like this hears beautiful music.
So-called noise cancelling headphone is exactly the earphone that can effectively reduce ambient noise.Objectively, nearly all earphone has all considered how to reduce outside noise at the beginning of design, but noise cancelling headphone has more outstanding performance having carried out more consideration aspect the reduction noise.
Noise cancelling headphone mainly is divided into two kinds according to principle: a kind of is passive noise cancelling headphone, and another kind is the active noise reduction earphone.So-called passive noise cancelling headphone is exactly by acoustic material on the earphone or special structure, as far as possible noise insulation.
The earphone of our the In-Ear earplug introduced and big earmuff design can be divided into the passive type noise cancelling headphone in the past.Certainly, the boundary that these are not strict is because purpose has only one: more effective reduction ambient noise how.
General active noise reduction earphone is to be provided with special Dolby circuit in earphone.General by audio receiver (as mini microphone) and antinoise pio chip, the frequency by receiving, analyze outside noise also produces the frequency opposite with it, weakens mutually or offsets, thereby reach the purpose that shields noise.Though also have some active noise reduction earphones can reach good noise reduction on the market now, all the principle complexity costs an arm and a leg, cost performance is very low.Our common noise cancelling headphone mostly costs an arm and a leg now, and volume is bigger, uses inconvenience, and the noise cancelling headphone of our design, volume is little, and it is easy to use that the life-span is long flexibly, and cost is low.
The utility model content
The deficiency of the utility model in order to solve the problems of the technologies described above provides a kind of result headphone simple, easy to use.
The utility model in order to achieve the above object, the technical scheme that is adopted is: a kind of wear-type noise cancelling headphone is provided, comprises headset main body, earphone connector, described wear-type noise cancelling headphone also comprises denoising device, and denoising device is arranged on the inside of headset main body.
Described denoising device comprises microphone, the circuit amplifier of collecting sound, the sound that microphone is collected utilizes discharge circuit through circuit amplifier, voice signal through circuit amplifier is divided into two-way, one tunnel straight-through phase place switching device shifter, to the phase place switching device shifter, two paths of signals meets to offset through inverting amplifier on another road.
Its beneficial effect of wear-type noise cancelling headphone described in the utility model is: discharge circuit realizes sending the waveform opposite with the acquired signal phase place, and if amplifier bandwidth and sensitivity enough, so just can reach our requirement.The outstanding advantage of this noise cancelling headphone that we are designed is: it is excellent noise reduction effect not only, and employed components and parts are cheap, and cost is low, is fit to produce.Compare with other noise cancelling headphones, our this noise cancelling headphone of design is cheap, energy consumption is low, the components and parts that use all are commonly used on the market, save operation, processing, operation, control and use all very easy be fit to produce in batches, and noise reduction will be got well much than other noise cancelling headphones.
Description of drawings
Fig. 1 headphone structural representation described in the utility model.
Fig. 2 headphone denoising device described in the utility model block diagram.
Fig. 3 headphone denoising device described in the utility model circuit diagram.
Among the figure, 1-earphone connector; The 2-denoising device; The 3-headset main body.
Embodiment
Embodiment
Make a kind of wear-type noise cancelling headphone, comprise headset main body, earphone connector, the wear-type noise cancelling headphone also comprises denoising device, and denoising device is arranged on the inside of headset main body.
Denoising device comprises microphone, the circuit amplifier of collecting sound, the sound that microphone is collected utilizes discharge circuit through circuit amplifier, voice signal through circuit amplifier is divided into two-way, one tunnel straight-through phase place switching device shifter, to the phase place switching device shifter, two paths of signals meets to offset through inverting amplifier on another road.
Sound is a kind of mechanical wave, and he produces by mechanical oscillation.Our perceives sound is that sound wave promotes eardrum in the ear according to the principle of sound wave interference, if two row frequencies are identical, the phase of wave that phase place is opposite is met, and they will be cancelled out each other.That is to say, identical if we can send the frequency with the noise sound wave with earphone, the sound wave that phase place is opposite and amplitude equates, the sound wave that noise sound wave and earphone send will be cancelled out each other, and will can't hear any sound in theory.Noise cancelling headphone with this principle making
Circuit theory is as (accompanying drawing 3).R1, R2, R3, C1 are the MIC power supply of two sound channels, and C2 and C3 are coupled to amplifier lC1-a and IC1-b with two voice signals that MIC picked up, and carry out first order homophase and amplify, and multiplication factor (is example with IC1-a) is:
A1=(R8+R6)=(33K Ω+1K Ω)/1K Ω=34 times
Signal after the amplification is divided into two-way, one tunnel straight-through phase place diverter switch S1, and another road enters IC2-a and IC2-b carries out anti-phase amplification, and multiplication factor is:
A2=R12/R10=10K Ω/10K Ω=1 times
From the signal of inverting amplifier output is that phase place is opposite, amplitude does not change, carrying out phase place by S1-a and S1-b switches, enter volume potentiometer R14 then, the sound wave amplitude that the adjustment volume can make earphone send equates with the noise waves amplitude, to reach best noise reduction, the signal of exporting from volume potentiometer enters the earphone driving amplifier that is made of IC3-a and IC3-b, and multiplication factor is:
A3=R19/R15=100K Ω/10K Ω=10 times
The multiplication factor of the anti-phase amplification of whole noise is A1A2A3=34 * 1 * 10=340 times.RP2 is the volume potentiometer of external sound source input signal.IC3 amplifies the signal from the external sound source input, and its multiplication factor is:
A4=R19/R17=100K Ω/10K Ω=10 times
It more than is exactly brief analysis to circuit.
Because make frequency, the amplitude of earphone output sound wave identical with noise, phase place is opposite, so MIC should try one's best near ear drum membrane, so MIC is installed on the earphone, can MIC be bonded on the casing of earphone with glue, promptly the MIC of L channel is installed on the left earphone, the MIC of R channel is installed on the right earphone, because the close together of MIC and ear drum membrane, therefore the error ratio of introducing is less, can ignore.The most handy headphone of earphone is because the relatively good installation of MIC like this.The laminated cell of the two joint 9V that power supply is used also can be used stabilized voltage power supply, and the Resistor-Capacitor Unit error of two sound channels is as far as possible little, and it is consistent that the characteristic of two MIC is wanted, otherwise can influence anti-acoustic capability.Amplifier NE5532, if want then to change NE5532 into TDA1308 with the lithium battery power supply of two joint 3.6V, performance is also pretty good.Because circuit is fairly simple, can make of omnipotent plate, economize and do printed panel.
The above; it only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to replacement or change according to the technical solution of the utility model and utility model design thereof, all should be encompassed within the protection range of the present utility model.
Claims (2)
1. the wear-type noise cancelling headphone comprises headset main body, earphone connector, it is characterized in that: described wear-type noise cancelling headphone also comprises denoising device, and denoising device is arranged on the inside of headset main body.
2. noise cancelling headphone according to claim 1, it is characterized in that: described denoising device comprises microphone, the circuit amplifier of collecting sound, the sound that microphone is collected utilizes discharge circuit through circuit amplifier, voice signal through circuit amplifier is divided into two-way, one tunnel straight-through phase place switching device shifter, to the phase place switching device shifter, two paths of signals meets to offset through inverting amplifier on another road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205885719U CN201854396U (en) | 2010-10-29 | 2010-10-29 | Head-wearing noise reduction earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205885719U CN201854396U (en) | 2010-10-29 | 2010-10-29 | Head-wearing noise reduction earphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201854396U true CN201854396U (en) | 2011-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205885719U Expired - Fee Related CN201854396U (en) | 2010-10-29 | 2010-10-29 | Head-wearing noise reduction earphone |
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| CN (1) | CN201854396U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499224A (en) * | 2016-08-20 | 2017-03-15 | 中声科技（北京）有限公司 | A kind of active noise reduction telephone booth for eliminating ambient noise |
| CN106535050A (en) * | 2016-08-20 | 2017-03-22 | 中声科技（北京）有限公司 | Active noise reduction module eliminating automobile noise |
| CN106535051A (en) * | 2016-08-20 | 2017-03-22 | 中声科技（北京）有限公司 | Mattress for active noise cancellation |
| CN106510350A (en) * | 2016-08-20 | 2017-03-22 | 中声科技（北京）有限公司 | Headrest for actively eliminating noise |
| CN106658293A (en) * | 2016-08-20 | 2017-05-10 | 中声科技（北京）有限公司 | refrigerator for automatically eliminating noise |
| CN106740332A (en) * | 2016-08-20 | 2017-05-31 | 中声科技（北京）有限公司 | A kind of active eliminates the automobile headrest of in-car noise |
| CN106782488A (en) * | 2016-08-20 | 2017-05-31 | 中声科技（北京）有限公司 | The washing machine that a kind of active abates the noise |
| CN107343235A (en) * | 2016-08-20 | 2017-11-10 | 中声科技（北京）有限公司 | It is a kind of can plug earphone cord active noise reduction earphone |
| CN108156546A (en) * | 2016-12-05 | 2018-06-12 | 骅讯电子企业股份有限公司 | Active noise reduction corrects system and loudspeaker arrangement |
| CN110505548A (en) * | 2019-07-22 | 2019-11-26 | 李群如 | A kind of multifunction wireless bluetooth headset |
| CN112869947A (en) * | 2021-03-23 | 2021-06-01 | 吉林大学 | Automatic positioning type active noise reduction earmuff |
-
2010
- 2010-10-29 CN CN2010205885719U patent/CN201854396U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499224A (en) * | 2016-08-20 | 2017-03-15 | 中声科技（北京）有限公司 | A kind of active noise reduction telephone booth for eliminating ambient noise |
| CN106535050A (en) * | 2016-08-20 | 2017-03-22 | 中声科技（北京）有限公司 | Active noise reduction module eliminating automobile noise |
| CN106535051A (en) * | 2016-08-20 | 2017-03-22 | 中声科技（北京）有限公司 | Mattress for active noise cancellation |
| CN106510350A (en) * | 2016-08-20 | 2017-03-22 | 中声科技（北京）有限公司 | Headrest for actively eliminating noise |
| CN106658293A (en) * | 2016-08-20 | 2017-05-10 | 中声科技（北京）有限公司 | refrigerator for automatically eliminating noise |
| CN106740332A (en) * | 2016-08-20 | 2017-05-31 | 中声科技（北京）有限公司 | A kind of active eliminates the automobile headrest of in-car noise |
| CN106782488A (en) * | 2016-08-20 | 2017-05-31 | 中声科技（北京）有限公司 | The washing machine that a kind of active abates the noise |
| CN107343235A (en) * | 2016-08-20 | 2017-11-10 | 中声科技（北京）有限公司 | It is a kind of can plug earphone cord active noise reduction earphone |
| CN108156546A (en) * | 2016-12-05 | 2018-06-12 | 骅讯电子企业股份有限公司 | Active noise reduction corrects system and loudspeaker arrangement |
| CN108156546B (en) * | 2016-12-05 | 2019-11-15 | 骅讯电子企业股份有限公司 | Active noise reduction corrects system and loudspeaker arrangement |
| CN110505548A (en) * | 2019-07-22 | 2019-11-26 | 李群如 | A kind of multifunction wireless bluetooth headset |
| CN110505548B (en) * | 2019-07-22 | 2021-05-04 | 李群如 | Multifunctional wireless Bluetooth earphone |
| CN112869947A (en) * | 2021-03-23 | 2021-06-01 | 吉林大学 | Automatic positioning type active noise reduction earmuff |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20111029 |