CN217656744U - Prevent audiphone circuit of whistling - Google Patents
Prevent audiphone circuit of whistling Download PDFInfo
- Publication number
- CN217656744U CN217656744U CN202221565491.0U CN202221565491U CN217656744U CN 217656744 U CN217656744 U CN 217656744U CN 202221565491 U CN202221565491 U CN 202221565491U CN 217656744 U CN217656744 U CN 217656744U
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- controller
- power supply
- amplifier
- circuit
- microphone
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- 230000002265 prevention Effects 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 230000005611 electricity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
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Abstract
The utility model discloses a prevent audiphone circuit of squealing relates to audiphone technical field, include: the microphone is connected with the input end of the controller, the output end of the controller is connected with the amplifier through an RC filter circuit, and the amplifier is connected with the loudspeaker; the controller is connected with the voice memory, the controller is further connected with a power supply, the microphone is connected with the power supply through a current-limiting resistor, and the power supply supplies power to the loudspeaker, the controller and the voice memory. The utility model discloses earlier pass through the signal that the microphone picked up through the controller conversion storage on speech storage U2, rethread time delay filter amplifier circuit makes a sound, effectively avoids squeaking.
Description
Technical Field
The utility model relates to a audiphone technical field, concretely relates to prevent audiphone circuit of squealing.
Background
At present, most of hearing aid circuits are realized by amplifying sound signals generated by a microphone and then pushing a loudspeaker to make sound, and the difficult-to-avoid squeal problem limits the functional designs of miniaturization, invisibility and the like of a hearing aid structure.
SUMMERY OF THE UTILITY MODEL
In order to solve the deficiencies of the prior art, the utility model provides a prevent hearing aid circuit of whistling.
The utility model provides a technical scheme does:
a howling prevention hearing aid circuit comprising:
the microphone is connected with the input end of the controller, the output end of the controller is connected with the amplifier through an RC filter circuit, and the amplifier is connected with the loudspeaker; the controller is connected with the voice memory,
the controller is further connected with a power supply, the microphone is connected with the power supply through a current-limiting resistor, and the power supply supplies power to the loudspeaker, the controller and the voice memory.
As a further technical scheme of the utility model do, power supply includes electric quantity detector and electricity quantity indicator lamp, electric quantity detector's output connection director, the electricity quantity indicator lamp is connected to the output of controller.
As a further technical scheme of the utility model do, set up the work pilot lamp on the power supply line.
As a further technical scheme of the utility model does, the controller is the singlechip that the model is STC15W 401S.
As a further technical solution of the present invention, the voice memory is a model 93C46 memory.
As a further technical scheme of the utility model, the amplifier is the triode of 8050 model.
The utility model has the advantages that:
1. the utility model discloses earlier pass through the signal that the microphone picked up through the controller conversion storage on speech storage U2, rethread time delay filter amplifier circuit makes a sound, effectively avoids squealing.
2. The power supply comprises an electric quantity detector and an electric quantity indicating lamp, and the electric quantity of the rechargeable lithium battery is displayed through the electric quantity indicating lamp so as to remind a user of residual electric quantity and charge in time.
3. Set up the work pilot lamp on the power supply circuit, when equipment power supply starts, the work pilot lamp is lighted, reminds the user to be operating condition.
4. The utility model discloses at single chip microcomputer control in-process, be in the power saving mode at ordinary times, the singlechip is in dormant state promptly. When the circuit receives an external signal, the single chip microcomputer is awakened to work, namely, the circuit is in a working mode, and the signal is stored and read at the same time. The same signal is stored and read with a certain time delay, and the time delay is adjustable. The read signal is amplified to a certain power by an amplifier and then is sounded. When the circuit works, the same signal and sound have certain time delay, the amplifier can not be in a positive feedback state all the time, and the circuit can not generate howling during working.
Drawings
Fig. 1 is a schematic circuit diagram of a squealing-proof hearing aid according to the present invention;
fig. 2 is a circuit control diagram of the howling-proof hearing aid of the present invention.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention belong to the protection scope of the present invention.
Referring to fig. 1 and 2, a howling prevention hearing aid circuit includes:
the microphone comprises a controller U1, an amplifier Q1, a voice memory U2 and a loudspeaker S1, wherein the input end of the controller U1 is connected with a microphone M1, the output end of the controller U1 is connected with the amplifier Q1 through an RC filter circuit, and the amplifier Q1 is connected with the loudspeaker S1; the controller U1 is connected with the voice memory U2;
the controller U1 is further connected with a power supply, the microphone M1 is connected with the power supply through a current-limiting resistor R2, and the power supply supplies power to the loudspeaker, the controller and the voice memory.
The utility model discloses earlier pass through controller U1 conversion storage on speech storage U2 with the signal that microphone M1 picked up, rethread time delay filter amplifier circuit makes a sound, the time delay filter circuit who comprises resistance R1 and electric capacity C1 carries out time delay filtering to sound, singlechip U1 ' S output connecting resistance R1 ' S first end, resistance R1 ' S second end passes through electric capacity C1 ground connection, resistance R1 ' S second end is connected with amplifier Q1 ' S base, amplifier Q1 ' S transmitting terminal ground connection, amplifier Q1 ' S collecting electrode is connected with loudspeaker S1 ' S negative pole, loudspeaker S1 ' S positive pole is connected with power supply, effectively avoid whistling. The whole working process is realized by the control of a single chip microcomputer.
The embodiment of the utility model provides an in, power supply includes electrical quantity detector and electric quantity indicator lamp, electrical quantity detector's output connection director, the electric quantity indicator lamp is connected to the output of controller. The power supply is chargeable lithium cell, detects chargeable lithium cell's electric quantity through the charge detector to show chargeable lithium cell's electric quantity through the power indicator, so that remind user's residual capacity, in time charge, adopt current display technology that charges to chargeable lithium cell's charge detector and power indicator, the utility model discloses do not specifically limit to this, with the power supply that can realize charging and show as accurate.
The embodiment of the utility model provides an in, set up the work pilot lamp on the power supply line, when equipment power supply started, the work pilot lamp was lighted, reminded the user for operating condition. And the functions of working mode, power saving mode, power shortage reminding and the like of the circuit can be realized.
The embodiment of the utility model provides an in, the controller is the singlechip that the model is STC15W401S, and speech memory is model 93C 46' S memory, and the amplifier is the triode of 8050 models.
The embodiment of the utility model provides an in, the circuit is in the economize on electricity mode at ordinary times at the single chip microcomputer control in-process, and the singlechip is in dormant state promptly. When the circuit receives an external signal, the single chip microcomputer is awakened to work, namely the circuit is in a working mode, and the signal is stored and read at the same time. The same signal is stored and read with a certain time delay, and the time delay is adjustable. The read signal is amplified to a certain power by an amplifier and then is sounded.
When the circuit works, the same signal and sound have certain time delay, the amplifier can not be in a positive feedback state all the time, and the circuit can not generate howling when working.
The present invention has been described in detail, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge range of those skilled in the art. Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not limited to the specific embodiments, but is intended to be limited only by the scope of the appended claims.
Claims (6)
1. An anti-howling hearing aid circuit, comprising:
the microphone-based voice control system comprises a controller, an amplifier, a voice memory and a loudspeaker, wherein the input end of the controller is connected with the microphone, the output end of the controller is connected with the amplifier through an RC (resistor-capacitor) filter circuit, and the amplifier is connected with the loudspeaker; the controller is connected with the voice memory,
the controller is further connected with a power supply, the microphone is connected with the power supply through a current-limiting resistor, and the power supply supplies power to the loudspeaker, the controller and the voice memory.
2. The howling prevention hearing aid circuit as claimed in claim 1, wherein said power supply comprises a power detector and a power indicator, an output terminal of said power detector is connected to a controller, and an output terminal of said controller is connected to said power indicator.
3. A howling prevention hearing aid circuit according to claim 1, wherein an operation indicator lamp is provided on the power supply line.
4. The howling prevention hearing aid circuit of claim 1, wherein the controller is a single chip microcomputer of type STC15W 401S.
5. A howling prevention hearing aid circuit according to claim 1, characterised in that said speech memory is a model 93C46 memory.
6. The howling prevention hearing aid circuit of claim 1, wherein the amplifier is an 8050 type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221565491.0U CN217656744U (en) | 2022-06-21 | 2022-06-21 | Prevent audiphone circuit of whistling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221565491.0U CN217656744U (en) | 2022-06-21 | 2022-06-21 | Prevent audiphone circuit of whistling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217656744U true CN217656744U (en) | 2022-10-25 |
Family
ID=83685582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221565491.0U Active CN217656744U (en) | 2022-06-21 | 2022-06-21 | Prevent audiphone circuit of whistling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217656744U (en) |
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2022
- 2022-06-21 CN CN202221565491.0U patent/CN217656744U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Room 301, No. 15 Dawobu Street, Xinya Street, Huadu District, Guangzhou City, Guangdong Province, 510000 (Airport Huadu) Patentee after: Guangdong Tengxiang Technology Co.,Ltd. Address before: 510000 one of the third floor of building a, No.5 Dongsheng Road, Huaxing Industrial Zone, Xinya street, Huadu District, Guangzhou City, Guangdong Province Patentee before: Guangdong Zhongrunzhi Medical Equipment Co.,Ltd. |
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| CP03 | Change of name, title or address |