CN202496063U - Simple high-sensitivity electronic hearing aid - Google Patents
Simple high-sensitivity electronic hearing aid Download PDFInfo
- Publication number
- CN202496063U CN202496063U CN2012200733757U CN201220073375U CN202496063U CN 202496063 U CN202496063 U CN 202496063U CN 2012200733757 U CN2012200733757 U CN 2012200733757U CN 201220073375 U CN201220073375 U CN 201220073375U CN 202496063 U CN202496063 U CN 202496063U
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- amplifier circuit
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Abstract
The utility model discloses a simple high-sensitivity electronic hearing aid which comprises a direct current source, an audio frequency acquisition circuit, a primary audio frequency amplification circuit, a secondary audio frequency amplification circuit, and an earphone. A signal output terminal of the audio frequency acquisition circuit is connected to a signal input terminal of the primary audio frequency amplification circuit, a signal output terminal of the primary audio frequency amplification circuit is connected to a signal input terminal of the secondary audio frequency amplification circuit, and a signal output terminal of the secondary audio frequency amplification circuit is connected to the earphone. The simple high-sensitivity electronic hearing aid has strong directivity and high sensitivity, people with hearing disorder can greatly improve hearing by using the simple high-sensitivity electronic hearing aid which is convenient for the normal work and life, and the simple high-sensitivity electronic hearing aid has the advantages of simple structure and low cost, and is convenient for popularization.
Description
Technical field
The utility model relates to a kind of hearing aids, relates in particular to a kind of simple and easy highly sensitive electronic hearing aid.
Background technology
The hyundai electronics hearing aids is an amplifier, and its function is to increase acoustic intensity also to import in the ear as far as possible without distortion.Because of the acoustic energy of sound can not directly amplify,, convert acoustic energy after the amplification again into so be necessary to be converted into the signal of telecommunication.But common electronic hearing aid complex structure cost is high, and insufficient sensitivity is good, and high-end electronic hearing aid is expensive especially again.
Summary of the invention
The purpose of the utility model provides a kind of simple and easy highly sensitive electronic hearing aid with regard to being in order to address the above problem.
The utility model is realized above-mentioned purpose through following technical scheme:
The utility model comprises DC power supply, audio collection circuit, one-level audio amplifier circuit, secondary audio amplifier circuit and earphone; The signal output part of said audio collection circuit is connected with the signal input part of said one-level audio amplifier circuit; Signal output part said and audio amplifier circuit is connected with the signal input part of said secondary audio amplifier circuit, and the signal output part of said second amplifying circuit is connected with said earphone.
Said audio collection circuit comprises microphone, first resistance, second resistance, the 3rd resistance, the 4th resistance, first electric capacity, the 4th electric capacity and second electric capacity; First end of said first resistance is connected with first end of first end of said second electric capacity, said second resistance and the positive pole of said DC power supply simultaneously; Second end of said first resistance is connected with first end of said first electric capacity and an end of said microphone simultaneously; Second end of said second electric capacity is connected with second end of said first electric capacity and first end of said the 4th resistance simultaneously; Second end of said second resistance is connected with first end of first end of said the 3rd resistance, said the 4th electric capacity and the positive signal input of said one-level audio amplifier circuit simultaneously; The other end of said microphone is connected with second end of second end of said the 3rd resistance, said the 4th electric capacity and the negative pole of said DC power supply simultaneously, and second end of said the 4th resistance is connected with the negative signal input of said one-level audio amplifier circuit.
Said one-level audio amplifier circuit comprises first operational amplifier, the 5th resistance, the 6th resistance and the 3rd electric capacity; The negative signal input of said first operational amplifier is connected with the negative signal output of said audio collection circuit and first end of said the 5th resistance simultaneously; Second end of said the 5th resistance is connected with the signal output part of said first operational amplifier and first end of said the 3rd electric capacity simultaneously; Second end of said the 3rd electric capacity is connected with first end of said the 6th resistance; Second end of said the 6th resistance is connected with the negative signal input of said secondary audio amplifier circuit, and the positive signal input of said first operational amplifier also is connected with the positive signal input of said secondary audio amplifier circuit.
Said secondary amplifier circuit for sound frequency signal comprises second operational amplifier, the 7th resistance and the 5th resistance; The negative signal input of said second operational amplifier is connected with the negative signal output of said one-level audio amplifier circuit and first end of said the 7th resistance simultaneously; The positive signal input of said second operational amplifier is connected with the positive signal output of said one-level audio amplifier circuit; The signal output part of said second operational amplifier is connected with second end of said the 7th resistance and first end of said the 5th electric capacity simultaneously; Second end of said the 5th electric capacity is connected with an end of said earphone, and the other end of said earphone is connected with the negative pole of said DC power supply.
The beneficial effect of the utility model is:
The utlity model has extremely strong directive property and high sensitivity; Hearing has the crowd of obstacle to use the utility model, can increase substantially hearing, is convenient to operate as normal and life; And the utlity model has advantage simple in structure, with low cost, be convenient to popularize.
Description of drawings
Accompanying drawing is the circuit structure schematic diagram of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
Shown in accompanying drawing: the utility model comprises DC power supply, audio collection circuit, one-level audio amplifier circuit, secondary audio amplifier circuit and earphone; The audio collection circuit comprises microphone MIC, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, first capacitor C 1, the 4th capacitor C 4 and second capacitor C 2; First end of first resistance R 1 is connected with first end of second capacitor C 2, first end of second resistance R 2 and the positive pole of DC power supply simultaneously; Second end of first resistance R 1 is connected with first end of first capacitor C 1 and the end of microphone MIC simultaneously; Second end of second capacitor C 2 is connected with second end of first capacitor C 1 and first end of the 4th resistance R 4 simultaneously; Second end of second resistance R 2 is connected with first end of the 3rd resistance R 3, first end of the 4th capacitor C 4 and the positive signal input of one-level audio amplifier circuit simultaneously, and the other end of microphone MIC is connected with second end of the 3rd resistance R 3, second end of the 4th capacitor C 4 and the negative pole of DC power supply simultaneously.
Shown in accompanying drawing: the one-level audio amplifier circuit comprises the first operational amplifier IC1, the 5th resistance R 5, the 6th resistance R 6 and the 3rd capacitor C 3; The negative signal input of the first operational amplifier IC1 is connected with second end of the 4th resistance R 4 and first end of the 5th resistance R 5 simultaneously; Second end of the 5th resistance R 5 is connected with the signal output part of the first operational amplifier IC1 and first end of the 3rd capacitor C 3 simultaneously, and second end of the 3rd capacitor C 3 is connected with first end of the 6th resistance R 6.
Shown in accompanying drawing: the secondary amplifier circuit for sound frequency signal comprises the second operational amplifier IC2, the 7th resistance R 7 and the 5th resistance R 5; The negative signal input of the second operational amplifier IC2 is connected with second end of the 6th resistance R 6 and first end of the 7th resistance R 7 simultaneously; The positive signal input of the second operational amplifier IC2 is connected with the positive signal output of the first operational amplifier IC1; The signal output part of the second operational amplifier IC2 is connected with second end of the 7th resistance R 7 and first end of the 5th capacitor C 5 simultaneously; Second end of the 5th capacitor C 5 is connected with the end of earphone SP, and the other end of earphone SP is connected with the negative pole of DC power supply.
Shown in accompanying drawing: microphone MIC receives the sound on the certain orientation (sound of other directions is suppressed); Through first capacitor C 1, second capacitor C 2 and 4 filtering of the 4th capacitor C; Send into the amplification quantity that 110 multiplication benefits are arranged after the one-level amplifier circuit for sound frequency signal amplifies after first resistance R 1 and the 4th resistance R 4 current limlitings; The output signal by 3 filtering of the 3rd capacitor C after through sending into the amplification quantity that 500 multiplication benefits are arranged behind the secondary audio signal amplifier after the 6th resistance R 6 current limlitings, the output signal is sent into earphone SP after by 5 filtering of the 5th capacitor C.High like this amplifying power is enough to atomic weak voice signal is amplified, and is exported by earphone SP.Hearing has the crowd of obstacle to use the utility model can increase substantially hearing.
Claims (4)
1. simple and easy highly sensitive electronic hearing aid; It is characterized in that: comprise DC power supply, audio collection circuit, one-level audio amplifier circuit, secondary audio amplifier circuit and earphone; The signal output part of said audio collection circuit is connected with the signal input part of said one-level audio amplifier circuit; Signal output part said and audio amplifier circuit is connected with the signal input part of said secondary audio amplifier circuit, and the signal output part of said second amplifying circuit is connected with said earphone.
2. a kind of simple and easy highly sensitive electronic hearing aid according to claim 1; It is characterized in that: said audio collection circuit comprises microphone, first resistance, second resistance, the 3rd resistance, the 4th resistance, first electric capacity, the 4th electric capacity and second electric capacity; First end of said first resistance is connected with first end of first end of said second electric capacity, said second resistance and the positive pole of said DC power supply simultaneously; Second end of said first resistance is connected with first end of said first electric capacity and an end of said microphone simultaneously; Second end of said second electric capacity is connected with second end of said first electric capacity and first end of said the 4th resistance simultaneously; Second end of said second resistance is connected with first end of first end of said the 3rd resistance, said the 4th electric capacity and the positive signal input of said one-level audio amplifier circuit simultaneously; The other end of said microphone is connected with second end of second end of said the 3rd resistance, said the 4th electric capacity and the negative pole of said DC power supply simultaneously, and second end of said the 4th resistance is connected with the negative signal input of said one-level audio amplifier circuit.
3. a kind of simple and easy highly sensitive electronic hearing aid according to claim 1; It is characterized in that: said one-level audio amplifier circuit comprises first operational amplifier, the 5th resistance, the 6th resistance and the 3rd electric capacity; The negative signal input of said first operational amplifier is connected with the negative signal output of said audio collection circuit and first end of said the 5th resistance simultaneously; Second end of said the 5th resistance is connected with the signal output part of said first operational amplifier and first end of said the 3rd electric capacity simultaneously; Second end of said the 3rd electric capacity is connected with first end of said the 6th resistance; Second end of said the 6th resistance is connected with the negative signal input of said secondary audio amplifier circuit, and the positive signal input of said first operational amplifier also is connected with the positive signal input of said secondary audio amplifier circuit.
4. a kind of simple and easy highly sensitive electronic hearing aid according to claim 1; It is characterized in that: said secondary amplifier circuit for sound frequency signal comprises second operational amplifier, the 7th resistance and the 5th resistance; The negative signal input of said second operational amplifier is connected with the negative signal output of said one-level audio amplifier circuit and first end of said the 7th resistance simultaneously; The positive signal input of said second operational amplifier is connected with the positive signal output of said one-level audio amplifier circuit; The signal output part of said second operational amplifier is connected with second end of said the 7th resistance and first end of said the 5th electric capacity simultaneously; Second end of said the 5th electric capacity is connected with an end of said earphone, and the other end of said earphone is connected with the negative pole of said DC power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200733757U CN202496063U (en) | 2012-03-01 | 2012-03-01 | Simple high-sensitivity electronic hearing aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200733757U CN202496063U (en) | 2012-03-01 | 2012-03-01 | Simple high-sensitivity electronic hearing aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202496063U true CN202496063U (en) | 2012-10-17 |
Family
ID=47002273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200733757U Expired - Fee Related CN202496063U (en) | 2012-03-01 | 2012-03-01 | Simple high-sensitivity electronic hearing aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202496063U (en) |
-
2012
- 2012-03-01 CN CN2012200733757U patent/CN202496063U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20121017 Termination date: 20130301 |