CN2694428Y - Noise guarding device used for ear cover - Google Patents
Noise guarding device used for ear cover Download PDFInfo
- Publication number
- CN2694428Y CN2694428Y CNU2004200077804U CN200420007780U CN2694428Y CN 2694428 Y CN2694428 Y CN 2694428Y CN U2004200077804 U CNU2004200077804 U CN U2004200077804U CN 200420007780 U CN200420007780 U CN 200420007780U CN 2694428 Y CN2694428 Y CN 2694428Y
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Abstract
The utility model relates to a noise guarding device used for ear cover, comprising the structuring elements of an audio receiving unit 1, an audio amplifying unit 2, a sound volume control amplifying unit 3, a current amplifying unit 4, a gain control signal unit 5, an impedance matching unit 6, a gain control unit 7, a gain adjusting unit 8, a sound volume adjusting unit 9, an audio amplifying unit 10, and an audio output unit 11. When the user is in the high noise environment, the utility model can attenuate the noise of the decibel over a certain value in the audio signals entering the ear cover, protecting the eardrum from harm.
Description
Technical field
The utility model is about a kind of earmuff noise protection device; be meant and a kind ofly formed by structure elements such as audio frequency receiving element, audio amplification unit, volume control amplifying unit, current amplification unit, gain control signal unit, impedance matching unit, gain control unit, gain adjusting unit, volume adjustment unit, audio amplification unit, audio output units; in the time of can making the wearer in being in the environment of high noisy; the noise of audio signal more than certain decibels that enters in the earmuff decayed, can not come to harm with the protection ear-drum.
Background technology
Though the earmuff that generally is used at present protect ear-drum can not come to harm has a lot on the structure kind with the noise protection device; but its technological means of taking to use in the structure design is only limited to and the noise more than certain decibels can be intercepted; the user that earmuff is worn in order is in this audio environment more than certain decibels the time; just can't hear the above any external sound of this decibels fully; and design of the present utility model can be accomplished to be decayed automatically entering the interior noise of audio signal more than certain decibels of cover exactly; this audio frequency can't be intercepted fully; make wear earmuff the user in this environment except protection ear-drum that can be very safe can not come to harm; still can hear that these all external sound exist, thus its with have more practical improvement under this common features is compared.
The utility model content
Fundamental purpose of the present utility model; provide a kind of earmuff noise protection device; utilize the component relationship of each structure element on it; can be decayed automatically entering the noise of the interior audio signal of earmuff more than certain decibels; this audio frequency can't be intercepted fully; make wear earmuff the user in this environment except protection ear-drum that can be very safe can not come to harm, can hear that still this all external sound exists.
Earmuff noise protection device, its characteristics are:
Described device comprises:
Audio frequency receiving element 1: can be Electret Condencer Microphone, received extraneous audio signal since using;
Audio amplification unit 2: with since will be somebody's turn to do by audio frequency receiving element 1 is received the external world audio signal amplified;
Volume control amplifying unit 3: the audio signal that since using this audio amplification unit 2 has been amplified amplifies again;
Current amplification unit 4: since using volume has been controlled the audio signal that amplifying unit 3 is received, the audio signal of conversion output is 85dB (equaling the audio signal of 0.6V voltage) after this current amplification unit 4 is handled;
Gain control signal unit 5: the 0.6V voltage audio signal after will having handled by current amplification unit 4 since using after the conversion of outputs, after its processing, the audio signal of output is the control signal of 0V voltage after the conversion;
Impedance matching unit 6: will have been mated by the audio signal that audio amplification unit 2 is amplified since using, the audio signal that audio amplification unit amplified is given impedance, reduce the sound signal loss;
Gain control unit 7: be the field effect electric crystal, with since will be changed the audio signal of back output when being the control signal of 0V voltage by receiving gain control signal unit 5, this just conducting of gain control unit 7, the audio signal that allows impedance matching unit 6 be amplified passes through volume adjustment unit 9 after gain adjusting unit 8 decay;
Volume adjustment unit 8: for variable resistor in order to adjust signal size, in order to control the size of output volume by the audio signal of above-mentioned impedance matching unit;
Audio amplification unit 10: adjust the audio signal of back in order to amplify above-mentioned volume adjustment unit 9;
Audio output unit 11: be loudspeaker, when sound signal after audio amplification unit 2 is handled, on the loudspeaker of audio output unit 11, can hear the audio signal that audio frequency receiving element 1 is connect.
Earmuff is with its structure of noise protection device, and its beneficial effect is:
The utility model is made up of structure elements such as audio frequency receiving element, audio amplification unit, volume control amplifying unit, current amplification unit, gain control signal unit, impedance matching unit, gain control unit, gain adjusting unit, volume adjustment unit, audio amplification unit, audio output units; in the time of can making the wearer in being in the environment of high noisy; the noise of audio signal more than certain decibels that enters in the earmuff decayed, can not come to harm with the protection ear-drum.
Description of drawings
Fig. 1 is that audio frequency of the present utility model receives circuit diagram;
Fig. 2 is the waveform contrast synoptic diagram that the utility model circuit at different levels is produced.
The figure number explanation:
Audio frequency receiving element 1 audio amplification unit 2
Volume control amplifying unit 3 current amplification units 4
Gain control signal unit 5 impedance matching units 6
Gain control unit 7 gain adjusting unit 8
Volume adjustment unit 9 audio amplification units 10
Audio output unit 11
Embodiment
See also shown in Fig. 1,2, wherein Fig. 1 is that the audio frequency of the utility model receives circuit diagram and Fig. 2 waveform that to be the utility model circuit at different levels produced contrasts synoptic diagram.From this two figure, can see that each member of the utility model and concern position and the function thereof between each member are by audio frequency receiving element 1, audio amplification unit 2, volume control amplifying unit 3, current amplification unit 4, gain control signal unit 5, impedance matching unit 6, gain control unit 7, gain adjusting unit 8, volume adjustment unit 9, audio amplification unit 10, structure elements such as audio output unit 11 constitute, wherein, audio frequency receiving element 1 can be Electret Condencer Microphone, its effect is to be used for receiving extraneous audio signal, when transmitting, the audio signal in the external world this audio signal can be delivered to audio amplification unit 2 places by circuit after being received by audio frequency receiving element 1, by audio amplification unit 2, will be somebody's turn to do to be received and come extraneous audio signal to be amplified by audio frequency receiving element 1; After being exaggerated, the audio signal in the external world is delivered to volume control amplifying unit 3 places by circuit again, the audio signal that audio amplification unit 2 should be amplified again by volume control amplifying unit 3 amplifies again, and the audio signal that is amplified by volume control amplifying unit 3 can be delivered to current amplification unit 4 places by circuit, handle the audio signal that is received by volume control amplifying unit 3 by current amplification unit 4 again, the audio signal of output is 85dB (equaling the audio signal of 0.6V voltage) after this current amplification unit 4 is handled, and can be delivered to 5 places, gain control signal unit by circuit again by the 0.6V voltage audio signal after the conversion of current amplification unit 4 processing back outputs, after the 5 reception processing of gain control signal unit, if the audio signal of conversion back output is the control signal of 0V voltage and when its received source of sound is audio signal less than 85dB, the audio signal of output is the control signal of 3V voltage after then changing; Impedance matching unit 6 can be mated by the audio signal that circuit transmission reception audio amplification unit 2 is amplified, and the audio signal that audio amplification unit 2 is amplified gives impedance, reduces the sound signal loss; Gain control unit 7, be the field effect electric crystal, when the audio signal of the above-mentioned gain control signal of the reception unit 5 back outputs of changing is the control signal of 0V voltage, this just conducting of gain control unit 7, the audio signal that allows impedance matching unit 6 be amplified passes through volume adjustment unit 9 after gain adjusting unit 8 decay, when the audio signal of the above-mentioned gain control signal of the reception unit 5 back outputs of changing is the control signal of 3V voltage, these gain control unit 7 just not conductings, the audio signal that allows impedance matching unit 6 be amplified can directly pass through volume adjustment unit 9; Gain adjusting unit 8, for fixed resistance in order to adjust the yield value after gain adjusting unit 8 decay; Volume adjustment unit 9, for variable resistor in order to adjust signal size, to control the size of output volume by the audio signal of above-mentioned impedance matching unit 6; Audio amplification unit 10 is adjusted the audio signal of back in order to amplify above-mentioned volume adjustment unit 9; Audio output unit 11; for loudspeaker when sound signal after audio amplification unit 10 is handled; on the loudspeaker of audio output unit 11, can hear the audio signal that audio frequency receiving element 1 is connect; respectively construct the device that element is formed by above-mentioned, thereby can not come to harm by noise attenuation volume output protection ear-drum.
Claims (3)
1. earmuff noise protection device is characterized in that:
Described device comprises:
Audio frequency receiving element (1): can be Electret Condencer Microphone, received extraneous audio signal since using;
Audio amplification unit (2): with since will be somebody's turn to do by audio frequency receiving element (1) received the external world audio signal amplified;
Volume control amplifying unit (3): the audio signal that since using this audio amplification unit (2) has been amplified amplifies again;
Current amplification unit (4): since using volume has been controlled the audio signal that amplifying unit (3) is received, the audio signal of conversion output is 85dB (equaling the audio signal of 0.6V voltage) after this current amplification unit (4) is handled;
Gain control signal unit (5): the 0.6V voltage audio signal after will having handled by current amplification unit (4) since using after the conversion of output, after its processing, the audio signal of output is the control signal of 0V voltage after the conversion;
Impedance matching unit (6): will have been mated by the audio signal that audio amplification unit (2) are amplified since using, the audio signal that audio amplification unit amplified is given impedance, reduce the sound signal loss;
Gain control unit (7): be the field effect electric crystal, with since will be changed the audio signal of back output when being the control signal of 0V voltage by receiving gain control signal unit (5), just conducting of this gain control unit (7), the audio signal that allows impedance matching unit (6) be amplified passes through volume adjustment unit (9) after gain adjusting unit (8) decay;
Volume adjustment unit (8): for variable resistor in order to adjust signal size, in order to control the size of output volume by the audio signal of above-mentioned impedance matching unit;
Audio amplification unit (10): adjust the audio signal of back in order to amplify above-mentioned volume adjustment unit (9);
Audio output unit (11): be loudspeaker, when sound signal after audio amplification unit (2) is handled, on the loudspeaker of audio output unit (11), can hear the audio signal that audio frequency receiving element (1) is connect.
2. earmuff noise protection device as claimed in claim 1 is characterized in that: gain control signal unit (5), if when its received source of sound is audio signal less than 85dB, then the audio signal of conversion output afterwards is the control signal of 3V voltage.
3. earmuff noise protection device as claimed in claim 1, it is characterized in that: gain control unit (7), when the audio signal of output is the control signal of 3V voltage after reception above-mentioned gain control signal unit (5) is changed, just not conducting of this gain control unit (7), the audio signal that allows impedance matching unit (6) be amplified can directly pass through volume adjustment unit (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200077804U CN2694428Y (en) | 2004-03-26 | 2004-03-26 | Noise guarding device used for ear cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200077804U CN2694428Y (en) | 2004-03-26 | 2004-03-26 | Noise guarding device used for ear cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2694428Y true CN2694428Y (en) | 2005-04-20 |
Family
ID=34767993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200077804U Expired - Fee Related CN2694428Y (en) | 2004-03-26 | 2004-03-26 | Noise guarding device used for ear cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2694428Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101399874B (en) * | 2007-09-28 | 2011-08-31 | 深圳富泰宏精密工业有限公司 | Mobile phone bell volume reinforcing apparatus and method |
| CN1983804B (en) * | 2005-12-16 | 2012-05-23 | 鸿富锦精密工业（深圳）有限公司 | Audio-frequency processor and volume management method |
| CN1980054B (en) * | 2005-11-30 | 2012-05-23 | 鸿富锦精密工业（深圳）有限公司 | Audio-frequency processing device and sound-volume management method |
| CN112492454A (en) * | 2020-12-14 | 2021-03-12 | 浩云科技股份有限公司 | Audio output regulating circuit and pickup |
-
2004
- 2004-03-26 CN CNU2004200077804U patent/CN2694428Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1980054B (en) * | 2005-11-30 | 2012-05-23 | 鸿富锦精密工业（深圳）有限公司 | Audio-frequency processing device and sound-volume management method |
| CN1983804B (en) * | 2005-12-16 | 2012-05-23 | 鸿富锦精密工业（深圳）有限公司 | Audio-frequency processor and volume management method |
| CN101399874B (en) * | 2007-09-28 | 2011-08-31 | 深圳富泰宏精密工业有限公司 | Mobile phone bell volume reinforcing apparatus and method |
| CN112492454A (en) * | 2020-12-14 | 2021-03-12 | 浩云科技股份有限公司 | Audio output regulating circuit and pickup |
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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 |