CN2253086Y - Dual track deaf aid - Google Patents
Dual track deaf aid Download PDFInfo
- Publication number
- CN2253086Y CN2253086Y CN 95228184 CN95228184U CN2253086Y CN 2253086 Y CN2253086 Y CN 2253086Y CN 95228184 CN95228184 CN 95228184 CN 95228184 U CN95228184 U CN 95228184U CN 2253086 Y CN2253086 Y CN 2253086Y
- Authority
- CN
- China
- Prior art keywords
- dual track
- amplifier
- volume
- hearing aids
- earphone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a dual track deaf aid, which comprises a mike, an audio frequency amplifier provided with single-ended input and double-ended output, two volume regulators respectively connected with the double-ended output and two earphones respectively connected with the output ends of the volume regulators. The differential amplifier is used, an input audio signal becomes a differential mode audio signal by voltage division of a resistor, and noises inside and outside of the deaf aid are further overcome; the amplified speech signal is transmitted to the two earphones through the double-ended output, and patients can respectively regulate the volume of each earphones according to personal situations; the utility model has the advantage of favorable deaf aid effect.
Description
The utility model relates to a kind of hearing aids, relates to a kind of dual track hearing aids or rather.
Existing hearing aids owing to pursue miniaturization, requires circuit design simple as far as possible, so the few function singleness of element, usually by-microphone ,-amplifier ,-volume adjuster and-earphone is linked in sequence and constitutes.The hearing aids of this kind structure can only play the effect of amplifier usually, because the occlusion of sound, if originally with regard to unheard sound, that still not can't hear with hearing aids yet, if strengthen volume, hearing aids has also amplified noise and noise when amplifying audio signal, so hearing aids does not improve the effect of audibility.In addition, when the hearing of two ears all has going down in various degree, have only the hearing aids of an earphone obviously can not improve the hearing of two ears simultaneously.
The purpose of this utility model is to design a kind of dual track hearing aids at the problems referred to above, improve the hearing aid effect of hearing aids, expanded functionality under the condition that does not increase the hearing aids volume is improved equal can the getting of diotic hearing power of deafness patient, can not hear the sound of various audio frequencies.
Dual track hearing aids of the present utility model, being linked in sequence by microphone, audio frequency amplifier, volume adjuster and the earphone of received audio signal constitutes, and it is characterized in that:
Described audio frequency amplifier is the dual track amplifier of single-ended input both-end output;
Described volume adjuster has two, and described earphone has two, and two outputs of described dual track amplifier connect respectively-volume adjuster, and each volume adjuster connects respectively-earphone.
Described dual track amplifier is-the differential input level Four audio frequency that amplifies that directly is coupled amplifies integrated.
Described microphone is the protection against noise Electret condenser microphone.
Receive voice signal by microphone, the amplification of the amplifier that amplifies through differential input, multistage direct coupling is carried out hearing aid through two earphones of volume adjuster dispensing respectively by its two output, and the volume of each earphone is all adjustable.
Further specify technology of the present utility model below in conjunction with the embodiment accompanying drawing
Fig. 1, dual track hearing aids electrical schematic diagram, integrated 10 is audio frequency amplifiers (TB531) that a level Four directly is coupled and amplifies among the figure, audio signal from protection against noise Electret condenser microphone MIC (state-run 797 factories of model C ZII-66. produce) is introduced from 10 3 pin through resistance R 25, capacitor C 12, and resistance R 25, capacitor C 12 constitute the cut-off circuit of low-frequency noise.Resistance R 23 is the source resistance of field effect transistor in the MIC.10 9 pin make by capacitor C 13 ground connection and constitute single-ended input state, and differential amplification is adopted in integrated input, and the audio signal of input is obtained the differential mode audio signal through electric resistance partial pressure, and the effect that further overcomes inside and outside noise of machine and noise is arranged.
Outer meeting resistance R24 between integrated 4,8 pin, triode V1 and V2, V5 and V6 in the sheet are connected into the emitter-base bandgap grading coupling (also can make resistance R 24 into potentiometer form, constitute the Voltage Series feedback loop of the 3rd utmost point, adjust the size that resistance can be adjusted volume) to first utmost point.
Integrated 6 pin connects positive supply, 1 pin ground connection.Dual track output pin 5,7, W1, W2 are the volume control potentiometer of two sound channels, and binaural audio signal is ear sending machine Y1, Y2 after volume is separately regulated.Integrated 2 pin, 10 pin are respectively through capacitor C 11, C14 ground connection, and capacitor C 11, C14 have the anti-stop signal of filter action by self-bias value circuit input to be formed feedback.
The utility model is simple in structure, owing to adopted its anti-noise microphone, noise noise etc. can not enter auditory prosthesis; Owing to adopted differential amplifier, the audio signal of input obtains the differential mode audio signal through electric resistance partial pressure, further overcome inside and outside noise and the noise of machine, what make amplification is pure voice signal, and output to two earphones through both-end, the patient can adjust the volume of each earphone according to s own situation respectively, thereby has improved hearing aid effect greatly.Integrated used of audio frequency amplifier of the utility model is not restricted to the described embodiments.
Claims (3)
1, a kind of dual track hearing aids, being linked in sequence by microphone, audio frequency amplifier, volume adjuster and the earphone of received audio signal constitutes, and it is characterized in that:
Described audio frequency amplifier is the dual track amplifier of single-ended input both-end output;
Described volume adjuster has two, and described earphone has two, and two outputs of described dual track amplifier connect respectively-volume adjuster, and each volume adjuster connects respectively-earphone.
2, dual track hearing aids according to claim 1 is characterized in that:
Described dual track amplifier is-the differential input level Four audio frequency that amplifies that directly is coupled amplifies integrated.
3, dual track hearing aids according to claim 1 is characterized in that:
Described microphone is the protection against noise Electret condenser microphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95228184 CN2253086Y (en) | 1995-12-28 | 1995-12-28 | Dual track deaf aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95228184 CN2253086Y (en) | 1995-12-28 | 1995-12-28 | Dual track deaf aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2253086Y true CN2253086Y (en) | 1997-04-23 |
Family
ID=33873833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95228184 Expired - Fee Related CN2253086Y (en) | 1995-12-28 | 1995-12-28 | Dual track deaf aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2253086Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332881A (en) * | 2011-10-24 | 2012-01-25 | 无锡艾立德智能科技有限公司 | Headset volume control circuit of key general mobile phone |
| CN102361666A (en) * | 2009-02-05 | 2012-02-22 | 耳蜗有限公司 | Multi-electrode channel configurations |
| CN104980861A (en) * | 2014-04-01 | 2015-10-14 | 天津市助听器厂 | Maximum volume output hearing aid |
| CN105848079A (en) * | 2015-02-04 | 2016-08-10 | 西万拓私人有限公司 | Listening device for binaural supply and method for operating same |
-
1995
- 1995-12-28 CN CN 95228184 patent/CN2253086Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361666A (en) * | 2009-02-05 | 2012-02-22 | 耳蜗有限公司 | Multi-electrode channel configurations |
| CN102361666B (en) * | 2009-02-05 | 2015-06-03 | 耳蜗有限公司 | Multi-electrode channel configurations |
| CN102332881A (en) * | 2011-10-24 | 2012-01-25 | 无锡艾立德智能科技有限公司 | Headset volume control circuit of key general mobile phone |
| CN102332881B (en) * | 2011-10-24 | 2013-09-25 | 无锡艾立德智能科技有限公司 | Headset volume control circuit of key general mobile phone |
| CN104980861A (en) * | 2014-04-01 | 2015-10-14 | 天津市助听器厂 | Maximum volume output hearing aid |
| CN105848079A (en) * | 2015-02-04 | 2016-08-10 | 西万拓私人有限公司 | Listening device for binaural supply and method for operating same |
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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 |