CN104661165A - Miniature hearing aid - Google Patents
Miniature hearing aid Download PDFInfo
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- CN104661165A CN104661165A CN201310598450.0A CN201310598450A CN104661165A CN 104661165 A CN104661165 A CN 104661165A CN 201310598450 A CN201310598450 A CN 201310598450A CN 104661165 A CN104661165 A CN 104661165A
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- electric capacity
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- integrated chip
- audio frequency
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- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The invention discloses a miniature hearing aid. The miniature hearing aid comprises a battery, a switch, a single-pole three-throw switch, an inductor coil, a microphone, an earphone socket, resistors 1-9, capacitors 1-10, a potentiometer, and an audio amplification integrated chip with the model of SL8712, wherein a sound from the outside is converted by the microphone, sent into the audio amplification integrated chip, amplified by the audio amplification integrated chip and played by an insert earphone of the earphone socket; by changing a threshold of the potentiometer, the value of a volume signal can be changed; the fourth resistor, the fifth resistor, the fifth capacitor and the sixth capacitor form a high-frequency actuation network to prevent self excitation of a circuit; the second capacitor suppresses interference of a low-frequency signal; the third capacitor suppresses interference of a high-frequency signal. The miniature hearing aid has the characteristics of being small in size, light, convenient, attractive in appearance, low in power consumption, low in noise, high in anti-interference, and the like, and is simple in circuit structure, few in elements, low in cost and beneficial to popularization and promotion.
Description
Technical field
The present invention relates to a kind of device of assisting hearing, particularly relate to a kind of Mini-otophone.
Background technology
Hearing aids is one and contributes to hearing disabilities person and improve dysacousis, and then the instrument of raising and his conference communicative competence, unit and instrument etc., it is exactly an electroacoustic amplifier, deaf person is heard sound amplification and originally can not hear clearly, unheard sound by it.But often large, the power consumption of a lot of hearing aids volume, noise are large, and sensitivity is low, and circuit structure is complicated, element is many, cost is high, is unfavorable for universal and popularization.
Summary of the invention
Object of the present invention is just to provide a kind of Mini-otophone to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
The present invention includes battery, switch, SP3T switch, inductance coil, microphone, earphone socket, first resistance is to the 9th resistance, first electric capacity is to the tenth electric capacity, potentiometer and model are that the audio frequency of SL8712 amplifies integrated chip, the positive pole of described battery connects the first end of described 9th resistance, second end of described 9th resistance connects the first end of described switch, second end of described switch is connected with the first end of described 8th resistance and the first end of described tenth electric capacity simultaneously, second end of described 8th resistance simultaneously with the first end of described first resistance, the first end of described earphone socket, the 12 pin that first end and the described audio frequency of described 3rd electric capacity amplify integrated chip is connected, second end of described first resistance is connected with the first end of described second electric capacity and the drain electrode of described microphone simultaneously, the 3rd pin that second end of described earphone socket simultaneously amplifies integrated chip with the second end of described 3rd electric capacity and described audio frequency is connected, described audio frequency amplifies the first end of described second resistance of the tenth pin connection of integrated chip, described audio frequency amplifies the first end of described 9th electric capacity of the 9th pin connection of integrated chip, the 4th pin that described audio frequency amplifies integrated chip is connected with the first end of described potentiometer and the sliding end of described potentiometer simultaneously, the 5th pin that described audio frequency amplifies integrated chip is connected with the first end of described 4th electric capacity and the first end of described first electric capacity simultaneously, the 6th pin that described audio frequency amplifies integrated chip is connected with the first end of described 6th resistance and the first end of described 7th electric capacity simultaneously, second end of described second resistance connects the second end of described potentiometer, second end of described first electric capacity connects the first end of described inductance coil, second end of described inductance coil connects the first end of described SP3T switch, second end of described SP3T switch simultaneously with the second end of described second electric capacity, the earth terminal of described microphone, the first end of described 6th electric capacity is connected with the first end of described 5th resistance, the source electrode of described microphone connects the first end of described 3rd resistance, second end of described 3rd resistance is connected with the second end of described 6th electric capacity and the first end of described 5th electric capacity simultaneously, second end of described 5th electric capacity is connected with the second end of described 4th electric capacity and the first end of described 4th resistance simultaneously, second end of described 4th resistance connects the second end of described 5th resistance, second end of described 7th electric capacity is connected with the first end of described 7th resistance and the first end of described 8th electric capacity simultaneously, the negative pole of described battery simultaneously with the second end of described tenth electric capacity, second end of described 9th electric capacity, second end of described 7th resistance, second end of described 8th electric capacity, second end of described 6th resistance, described audio frequency amplifies the 7th pin of integrated chip and the control end ground connection of described SP3T switch.
Beneficial effect of the present invention is:
The present invention have volume little, lightly nimble, elegant in appearance, power consumption is low, noise is low, anti-interference strong advantage, and circuit structure is simple, element is few, cost is low, partial ohmic electric capacity composition high frequency attenuation network in circuit, can prevent circuit from producing self-excitation, circuit working is stablized.
Accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1: the present invention includes battery E, switch S, SP3T switch S A, inductance coil L, microphone BM, earphone socket XS, first resistance R1 is to the 9th resistance R9, first electric capacity C1 is to the tenth electric capacity C10, potentiometer RP and model are that the audio frequency of SL8712 amplifies integrated chip IC, the positive pole of battery E connects the first end of the 9th resistance R9, the first end of the second end connecting valve S of the 9th resistance R9, second end of switch S is connected with the first end of the 8th resistance R8 and the first end of the tenth electric capacity C10 simultaneously, second end of the 8th resistance R8 simultaneously with the first end of the first resistance R1, the first end of earphone socket XS, the 12 pin that first end and the audio frequency of the 3rd electric capacity C3 amplify integrated chip IC is connected, second end of the first resistance R1 is connected with the first end of the second electric capacity C2 and the drain electrode of microphone BM simultaneously, the 3rd pin that second end of earphone socket XS simultaneously amplifies integrated chip IC with second end of the 3rd electric capacity C3 and audio frequency is connected, tenth pin of audio frequency amplification integrated chip IC connects the first end of the second resistance R2, audio frequency amplifies the first end of the 9th pin connection the 9th electric capacity C9 of integrated chip IC, the 4th pin that audio frequency amplifies integrated chip IC is connected with the first end of potentiometer RP and the sliding end of potentiometer RP simultaneously, the 5th pin that audio frequency amplifies integrated chip IC is connected with the first end of the 4th electric capacity C4 and the first end of the first electric capacity C1 simultaneously, the 6th pin that audio frequency amplifies integrated chip IC is connected with the first end of the 6th resistance R6 and the first end of the 7th electric capacity C7 simultaneously, second end of the second resistance R2 connects second end of potentiometer RP, second end of the first electric capacity C1 connects the first end of inductance coil L, second end of inductance coil L connects the first end of SP3T switch S A, second end of SP3T switch S A simultaneously with second end of the second electric capacity C2, the earth terminal of microphone BM, the first end of the 6th electric capacity C6 is connected with the first end of the 5th resistance R5, the source electrode of microphone BM connects the first end of the 3rd resistance R3, second end of the 3rd resistance R3 is connected with second end of the 6th electric capacity C6 and the first end of the 5th electric capacity C5 simultaneously, second end of the 5th electric capacity C5 is connected with second end of the 4th electric capacity C4 and the first end of the 4th resistance R4 simultaneously, second end of the 4th resistance R4 connects second end of the 5th resistance R5, second end of the 7th electric capacity C7 is connected with the first end of the 7th resistance R7 and the first end of the 8th electric capacity C8 simultaneously, the negative pole of battery E simultaneously with second end of the tenth electric capacity C10, second end of the 9th electric capacity C9, second end of the 7th resistance R7, second end of the 8th electric capacity C8, second end of the 6th resistance R6, audio frequency amplifies the 7th pin of integrated chip IC and the control end ground connection of SP3T switch S A.
Operation principle of the present invention:
As shown in Figure 1: the sound that the external world sends is changed by microphone BM, send into audio frequency and amplify integrated chip IC, amplify after integrated chip IC amplification through audio frequency, exported, by the insert earphone playback of earphone socket XS by the 3rd pin.Wherein, 4th pin and the tenth pin of audio frequency amplification integrated chip IC are connected in series the second resistance R2, potentiometer RP, change the limit value of potentiometer RP, then can change the size of signal volume, and the second resistance R2 burns out integrated package and plays a part current limliting when preventing potentiometer RP to be adjusted to 0 Ω, 4th resistance R4, 5th resistance R5 and the 5th electric capacity C5, 6th electric capacity C6 forms high frequency attenuation network, self-excitation is produced to prevent circuit, the size of self-excitation degree is regulated by the 4th resistance R4, second electric capacity C2 is attempted by microphone BM two ends to suppress the interference of low frequency signal, 3rd electric capacity C3 is attempted by earphone socket XS two ends to suppress the interference of high-frequency signal.
Claims (1)
1. a Mini-otophone, it is characterized in that: comprise battery, switch, SP3T switch, inductance coil, microphone, earphone socket, first resistance is to the 9th resistance, first electric capacity is to the tenth electric capacity, potentiometer and model are that the audio frequency of SL8712 amplifies integrated chip, the positive pole of described battery connects the first end of described 9th resistance, second end of described 9th resistance connects the first end of described switch, second end of described switch is connected with the first end of described 8th resistance and the first end of described tenth electric capacity simultaneously, second end of described 8th resistance simultaneously with the first end of described first resistance, the first end of described earphone socket, the 12 pin that first end and the described audio frequency of described 3rd electric capacity amplify integrated chip is connected, second end of described first resistance is connected with the first end of described second electric capacity and the drain electrode of described microphone simultaneously, the 3rd pin that second end of described earphone socket simultaneously amplifies integrated chip with the second end of described 3rd electric capacity and described audio frequency is connected, described audio frequency amplifies the first end of described second resistance of the tenth pin connection of integrated chip, described audio frequency amplifies the first end of described 9th electric capacity of the 9th pin connection of integrated chip, the 4th pin that described audio frequency amplifies integrated chip is connected with the first end of described potentiometer and the sliding end of described potentiometer simultaneously, the 5th pin that described audio frequency amplifies integrated chip is connected with the first end of described 4th electric capacity and the first end of described first electric capacity simultaneously, the 6th pin that described audio frequency amplifies integrated chip is connected with the first end of described 6th resistance and the first end of described 7th electric capacity simultaneously, second end of described second resistance connects the second end of described potentiometer, second end of described first electric capacity connects the first end of described inductance coil, second end of described inductance coil connects the first end of described SP3T switch, second end of described SP3T switch simultaneously with the second end of described second electric capacity, the earth terminal of described microphone, the first end of described 6th electric capacity is connected with the first end of described 5th resistance, the source electrode of described microphone connects the first end of described 3rd resistance, second end of described 3rd resistance is connected with the second end of described 6th electric capacity and the first end of described 5th electric capacity simultaneously, second end of described 5th electric capacity is connected with the second end of described 4th electric capacity and the first end of described 4th resistance simultaneously, second end of described 4th resistance connects the second end of described 5th resistance, second end of described 7th electric capacity is connected with the first end of described 7th resistance and the first end of described 8th electric capacity simultaneously, the negative pole of described battery simultaneously with the second end of described tenth electric capacity, second end of described 9th electric capacity, second end of described 7th resistance, second end of described 8th electric capacity, second end of described 6th resistance, described audio frequency amplifies the 7th pin of integrated chip and the control end ground connection of described SP3T switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310598450.0A CN104661165A (en) | 2013-11-25 | 2013-11-25 | Miniature hearing aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310598450.0A CN104661165A (en) | 2013-11-25 | 2013-11-25 | Miniature hearing aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104661165A true CN104661165A (en) | 2015-05-27 |
Family
ID=53251764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310598450.0A Pending CN104661165A (en) | 2013-11-25 | 2013-11-25 | Miniature hearing aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104661165A (en) |
-
2013
- 2013-11-25 CN CN201310598450.0A patent/CN104661165A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |