CN101616354A - Optical microphone - Google Patents
Optical microphone Download PDFInfo
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- CN101616354A CN101616354A CN200810126739A CN200810126739A CN101616354A CN 101616354 A CN101616354 A CN 101616354A CN 200810126739 A CN200810126739 A CN 200810126739A CN 200810126739 A CN200810126739 A CN 200810126739A CN 101616354 A CN101616354 A CN 101616354A
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- light
- signal
- photo
- vibrating membrane
- microphone
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- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
A kind of audio input device that is combined in circuit with light is a microphone.By the shading value of sound transmission vibration film vibrations change light, the light signal by photo resistance reception light and shade changes the signal of telecommunication at last into again.External other reaction force that is not subjected to of the resistance that is subjected to except the vibrating membrane displacement in this device, so, can detect littler decibel voice signal, react sensitiveer.
Description
Technical field
The present invention relates to a kind of audio input device that is combined in circuit with light is microphone.
Background technology
At present, known microphone has two kinds, and a kind of is the carbon granules formula; A kind of is DYN dynamic.The microphone of carbon granules formula is to pass the degree of tightness generation effect of carbon granules heap to carbon granules by sound wave, influences the variation of its resistance value in circuit, and sound changes the signal of telecommunication into the most at last, but has reaction force when work.DYN dynamic microphone is by the coil on the fixing vibrating membrane, and cutting magnetic induction line produces the induced electricity dynamic formula and finally obtains the signal of telecommunication, has the reaction force with the sound wave transmission when coil flows through electric current in the coil.
Summary of the invention
The present invention adopts the reflective or printing opacity of vibrating membrane, and by the shading value of sound transmission vibration film vibrations change light, the light signal by photo resistance reception light and shade changes the signal of telecommunication at last into again.External other reaction force that is not subjected to of the resistance that is subjected to except the vibrating membrane displacement in this device.
The technical solution adopted for the present invention to solve the technical problems has two kinds: first kind, make light source with light-emitting diode or other light-emitting device, requiring light source is a light pencil, be coated with bright reflective thing with an opaque vibration membrane in one side, light beam is shone on reflective surface with a low-angle, the sensitization head of the quick resistance of light positive irradiation that reflects, requiring vibration membrane to can be exchanged into light beam with the fluctuation of sound changes according in photo resistance what and both can, the two poles of the earth of photo resistance are directly drawn two outlets that substitute former microphone, the characteristic of photo resistance this moment and the microphone of carbon granules formula are close again.Second kind, with the light source of optically focused or the light source of dispersing, do tiny light hole in the centre of vibrating membrane, light source is near light hole, the opposite side of the corresponding light hole of photo resistance, sound transmission vibration film movement conversion is the variation of light hole to light source distance like this, and then is converted to what the variation by light hole light, realizes the conversion of acousto-optic electricity.
The invention has the beneficial effects as follows that owing to adopted the power of sound road light to change in the conversion of conducting electricity, the middle reaction force that does not have the sound transmission so the reaction of microphone is sensitiveer, can receive the voice signal of lower decibel.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is first kind of scheme schematic diagram of the present invention.
Fig. 2 is second kind of scheme schematic diagram of the present invention.
1. light sources among Fig. 1 and Fig. 2,2. photo-sensitive cell, 3. vibrating membrane, 4. reflective surface, 5. component pin, 6. light hole.
Embodiment
First kind of scheme according to Fig. 1 structural configuration wherein (1) light source can use light-emitting diode, (2) photo-sensitive cell can be used photo resistance, (3) use vibrating membrane, (4) reflective surface is to be coated with reflective thing on the vibrating membrane, (5) are the electric wire pins of light-emitting component and photo-sensitive cell.
Second kind of scheme according to Fig. 2 structural configuration wherein (1) light source can use light-emitting diode, (2) photo-sensitive cell can be used photo resistance, and (3) use vibrating membrane, and (4) reflective surface is to be coated with reflective thing on the vibrating membrane, (5) be the electric wire pin of light-emitting component and photo-sensitive cell, the light hole in the middle of (6) vibrating membrane.
Claims (2)
1. an audio input device that is combined in circuit with light is an optical microphone.By the shading value of sound transmission vibration film vibrations change light, the light signal by photo resistance reception light and shade changes the signal of telecommunication at last into again.
2. to the described optical microphone of claim 1, it is characterized in that: light source, photo-sensitive cell and vibrating membrane combination, realize that movement conversion with vibrating membrane is a light source to what the variation of photo-sensitive cell light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810126739A CN101616354A (en) | 2008-06-23 | 2008-06-23 | Optical microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810126739A CN101616354A (en) | 2008-06-23 | 2008-06-23 | Optical microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101616354A true CN101616354A (en) | 2009-12-30 |
Family
ID=41495691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810126739A Pending CN101616354A (en) | 2008-06-23 | 2008-06-23 | Optical microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101616354A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569788A (en) * | 2015-01-13 | 2015-04-29 | 宁波麦博韦尔移动电话有限公司 | Mainboard voice frequency circuit testing device and method |
| CN105490142A (en) * | 2015-12-17 | 2016-04-13 | 中国人民解放军国防科学技术大学 | Laser sound conducting method and device |
-
2008
- 2008-06-23 CN CN200810126739A patent/CN101616354A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569788A (en) * | 2015-01-13 | 2015-04-29 | 宁波麦博韦尔移动电话有限公司 | Mainboard voice frequency circuit testing device and method |
| CN105490142A (en) * | 2015-12-17 | 2016-04-13 | 中国人民解放军国防科学技术大学 | Laser sound conducting method and device |
| CN105490142B (en) * | 2015-12-17 | 2018-07-03 | 中国人民解放军国防科学技术大学 | A kind of laser acoustic method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20091230 |