CN214901308U - Circuit applied to hearing aid - Google Patents
Circuit applied to hearing aid Download PDFInfo
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- CN214901308U CN214901308U CN202121370722.8U CN202121370722U CN214901308U CN 214901308 U CN214901308 U CN 214901308U CN 202121370722 U CN202121370722 U CN 202121370722U CN 214901308 U CN214901308 U CN 214901308U
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Abstract
The utility model provides a be applied to circuit of audiphone belongs to the audiphone field. The utility model discloses a processing circuit is gathered to audiphone audio frequency, bluetooth audio frequency, the circuit of being applied to the audiphone still includes change over switch and earphone output control circuit, wherein, change over switch's input selectivity with audiphone audio frequency gather processing circuit output and bluetooth audio frequency gather processing circuit output and link to each other, change over switch's output links to each other with earphone output control circuit input. The utility model has the advantages that: compatible bluetooth headset function, it is more convenient to use.
Description
Technical Field
The utility model relates to a audiphone especially relates to a be applied to circuit of audiphone.
Background
The traditional hearing aid products are mainly operated in a master control and universal 3-key mode and are matched with a single earmuff to perform hearing aid, so that the requirements on the size of the earmuff and the proper degree and method of wearing are high, and then various problems exist in the aspects of squeal suppression, operation performance and the like. This has the following problems:
1. most existing hearing aid products have the function of single hearing aid, so that the user who needs the Bluetooth headset is embarrassed;
2. most hearing aids in the market are carried out in a 3-key mode, so that a plurality of combinations required by operation can be realized, and particularly for the groups of the old, the old is often unconscious in complex operation, so that the popularization is difficult;
3. the power consumption of the whole hearing aid is very high, the general power consumption is about 6mA, but because the hearing aid product cannot be placed with a large battery due to the problem of size limitation, the design of the power consumption is particularly critical;
4. the universal hearing aid adopts a single-ear cap wearing mode, so that the wearing suitable crowd is narrow, and the universality is poor;
5. the execution by one master control can cause the complexity limit of the algorithm to be too low, and meanwhile, the operation speed is greatly reduced, so that a plurality of fine audio processing can not be executed;
6. the general hearing aid product has no high requirement on the sound quality, and the hearing experience is influenced.
SUMMERY OF THE UTILITY MODEL
For solving the problem among the prior art, the utility model provides a be applied to circuit of audiphone.
The utility model discloses a processing circuit is gathered to audiphone audio frequency, bluetooth audio frequency, the circuit of being applied to the audiphone still includes change over switch and earphone output control circuit, wherein, change over switch's input selectivity with audiphone audio frequency gather processing circuit output and bluetooth audio frequency gather processing circuit output and link to each other, change over switch's output links to each other with earphone output control circuit input.
The utility model discloses make further improvement, still include keying circuit, keying circuit includes mode switching key, shut down key, adds the key, subtracts key and pause key.
The utility model discloses make further improvement, audiphone audio frequency acquisition processing circuit includes audiphone audio frequency acquisition circuit, the audiphone audio frequency processing module who links to each other with audiphone audio frequency acquisition circuit output, the audio output circuit who links to each other with audiphone audio frequency processing module, still includes the audiphone information storage circuit who links to each other with audiphone audio frequency processing module.
The utility model discloses do further improvement, hearing aid audio frequency processing module includes audio frequency processing chip U4, audio frequency processing chip U4 adopts the audio frequency master control to adopt the HA320D chip, the HA320D chip adopts the low-power consumption design, and the chip consumption of complete machine is less than 1.5mA, is furnished with 4 channel filter banks and accelerates engine, three routes ALU hardware and accelerates engine, three routes vector characteristic statistics hardware and accelerates engine, two routes algorithm hardware in addition and accelerates the engine.
The utility model discloses make further improvement, bluetooth audio acquisition processing circuit includes bluetooth master control circuit, the bluetooth audio acquisition circuit and the crystal oscillator drive circuit that link to each other with bluetooth master control circuit respectively, still includes the interface circuit who links to each other with bluetooth master control circuit.
The utility model discloses make further improvement, change over switch is audio frequency switching analog switch circuit, including analog switch, analog switch's first input pin 2 links to each other with audiphone audio frequency collection processing circuit output, analog switch's second input pin 5, 7 link to each other with two way signal output part of bluetooth audio frequency collection processing circuit, analog switch's pin 3, 9 are output pin.
The utility model discloses make further improvement, the earphone amplifier circuit of back level is given in the output of earphone output control circuit, handles the back and exports for loudspeaker pronunciation.
The utility model discloses make further improvement, earphone output control circuit adopts HT97220 main control chip to carry out the output processing of audio frequency.
The utility model discloses make further improvement, still include the LDO voltage stabilizing circuit of the steady voltage that links to each other with the power, provide constant voltage power supply for whole circuit.
The utility model discloses make further improvement, still include indicating circuit, indicating circuit includes first LED lamp and second LED lamp, the input of first LED lamp links to each other with bluetooth audio frequency collection processing circuit output, the input of second LED lamp links to each other with power output.
Compared with the prior art, the beneficial effects of the utility model are that: the Bluetooth headset is compatible with the function of the Bluetooth headset, and is more convenient to use; the circuit is additionally provided with one path of key control except for three daily keys, switching of simulation scenes is listed independently, and good function adjustment is performed for most of using groups, so that the requirements of markets and users are greatly met; the audio main control chip of the hearing aid audio acquisition processing circuit can quickly process the sound, so that the operation speed is greatly improved; the howling is suppressed on the circuit, and the hearing experience of a user is improved; in the tone quality processing part, the earphone output control circuit adopts HT97220 master control to carry out the output processing of audio frequency, has excellent bass effect, does not have the click sound, supports single-ended input and fully differential input simultaneously for the bass of whole audio frequency section can obtain the maximum retention, perfect compensateing the defect that most audiphone products tone quality is crude.
Drawings
FIG. 1 is a block diagram of the present invention;
fig. 2 is a schematic diagram of a bluetooth audio acquisition processing circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the hearing aid audio acquisition processing circuitry;
fig. 4 is a schematic diagram of a change-over switch, an earphone output control circuit and a key circuit.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the utility model discloses a processing circuit is gathered to audiphone audio frequency, bluetooth audio frequency, the circuit of being applied to the audiphone still includes change over switch and earphone output control circuit, wherein, change over switch's input selectivity link to each other with audiphone audio frequency collection processing circuit output and bluetooth audio frequency collection processing circuit output, change over switch's output links to each other with earphone output control circuit input.
This example also includes a key circuit that includes a mode toggle for switching between hearing aid mode and bluetooth module, an off key, an add key, a subtract key, and a pause key.
As shown in fig. 1 and fig. 3, the hearing aid audio acquisition processing circuit in this embodiment includes a hearing aid audio acquisition circuit, a hearing aid audio processing module connected to an output end of the hearing aid audio acquisition circuit, an audio output circuit connected to the hearing aid audio processing module, and a hearing aid information storage circuit connected to the hearing aid audio processing module.
The hearing aid audio processing module comprises an audio processing chip U4, the audio processing chip U4 adopts an HA320D chip for audio master control, the chip adopts a low-power-consumption design, and the adjustment of 4-gear operation speed is adopted, so that the low-power-consumption operation can be realized, the power consumption of the chip of the whole hearing aid can be less than 1.5mA, a 200mAh battery is adopted in time, and the endurance index of more than 6 days can still be realized. In addition, the main control chip is matched with a high-performance engine and is provided with a 4-channel filter bank acceleration engine, time domain channel analysis and channel synthesis can be rapidly realized, in addition, three ALU hardware acceleration engines, three vector characteristic statistics hardware acceleration engines and two algorithm hardware acceleration engines are also arranged, one is vector data format conversion, the other is a Fourier calculation hardware acceleration engine, the switching and calculation of 4 simulation scenes can be efficiently realized, and meanwhile, a rapid and fine audio processing algorithm can also be realized.
As shown in fig. 4, most of the operation buttons on the market are 3, which are an add button, a subtract button and a play pause button, if the scene switching function can only be realized by compound button pressing or continuous button pressing according to the conventional design, but the operation is very inconvenient for the elderly, so the circuit makes special adjustment for the elderly population, adds one-way button control, and lists the switching of the simulation scenes separately, wherein the button S1 is a power-off/mode switching button, the button S2 is an add button, the button S3 is a subtract button, and the button S4 is a play pause button. Or a mode switching key can be independently arranged to switch the working modes. The functions of most of the used groups are well adjusted, and the requirements of the market and users are greatly met.
The Bluetooth audio acquisition and processing circuit further comprises an indicating circuit, wherein the indicating circuit is used for indicating the working state and comprises a red LED lamp D2 and a blue LED lamp D1, the input end of the red LED lamp D2 is connected with the output end of the Bluetooth audio acquisition and processing circuit and used for indicating the Bluetooth connection state, and the input end of the blue LED lamp D1 is connected with the power output end and used for indicating the power supply state.
As shown in fig. 1 and fig. 3, the bluetooth call and hearing aid functions are simultaneously required for part of users, so that the circuit is added with a bluetooth chip of AC8976 to specially process the bluetooth call function. The specific bluetooth audio acquisition processing circuit of this example includes bluetooth master control circuit, bluetooth audio acquisition circuit and crystal oscillator drive circuit that respectively links to each other with bluetooth master control circuit, still includes the interface circuit who links to each other with bluetooth master control circuit.
The utility model discloses still include the peripheral hardware interface that links to each other with the bluetooth chip, this example peripheral hardware interface is the USB interface. Through detaching the design of audiphone list earmuff, unite two into one the earphone of bluetooth headset and audiphone, increased the travelling comfort, promoted the sense organ that is used for and experienced.
As shown in fig. 1 and 4, the switch is an audio switching analog switch circuit, and includes an analog switch, a first input pin 2 of the analog switch is connected to an output terminal of the hearing aid audio acquisition and processing circuit, second input pins 5 and 7 of the analog switch are connected to two signal output terminals of the bluetooth audio acquisition and processing circuit, and pins 3 and 9 of the analog switch are output pins.
In the tone quality processing part, the earphone output control circuit of this example adopts HT97220 master control chip to carry out audio output processing, and this circuit has outstanding bass effect, does not have the click sound, supports single-ended input and fully differential input simultaneously, provides excellent THD + N in whole audio frequency band to make the bass of whole audio frequency section can obtain the biggest reservation, perfect the defect that most audiphone products tone quality are crude has been remedied, let the audiphone not only do the hearing aid, be the preferred product of bluetooth headset more.
In the embodiment, the audio is processed by the HA320D audio processing chip and the HT97220 main control chip, and the two main control chips respectively perform their own functions, so that the processing efficiency and the product performance can be ensured, and the advantages of the two main control chips can be fully utilized, so that the tone quality is better.
The embodiment also comprises a stable LDO voltage stabilizing circuit connected with the power supply and used for providing a stable 3.3V power supply for the Bluetooth chip and the audio switching analog switch circuit.
The main control of the Bluetooth processing of the circuit is responsible for processing the whole Bluetooth audio, and is responsible for controlling the whole system time sequence, and also responsible for disconnection of the Bluetooth, audio transmission of the Bluetooth, Bluetooth communication flow and processing of peripheral interfaces.
The hearing aid audio signal who gathers, the pickup microphone pickup through the hearing aid, then realize 4 independent WDRC (dynamic range) of way and adjust and the amplification and the audio effect of audio frequency and handle, then audio frequency analog signal transmits for earphone output control circuit, carry out the processing of tone quality, the back of handling, the output is for fortune module circuit, fortune module circuit amplified signal back, the output is for earphone amplifier circuit, earphone amplifier circuit adopts the loudspeaker of moving-iron formula to carry out the broadcast of audio frequency.
The above-mentioned embodiments are the preferred embodiments of the present invention, and the scope of the present invention is not limited to the above-mentioned embodiments, and the scope of the present invention includes and is not limited to the above-mentioned embodiments, and all equivalent changes made according to the present invention are within the protection scope of the present invention.
Claims (10)
1. A circuit for use in a hearing aid, comprising: the circuit applied to the hearing aid further comprises a selector switch and an earphone output control circuit, wherein the input end of the selector switch is selectively connected with the output end of the hearing aid audio acquisition processing circuit and the output end of the Bluetooth audio acquisition processing circuit, and the output end of the selector switch is connected with the input end of the earphone output control circuit.
2. The circuit of claim 1, wherein: the key circuit comprises a mode switching key, a shutdown key, an add key, a subtract key and a pause key.
3. The circuit of claim 1, wherein: the hearing aid audio acquisition processing circuit comprises a hearing aid audio acquisition circuit, a hearing aid audio processing module connected with the output end of the hearing aid audio acquisition circuit, an audio output circuit connected with the hearing aid audio processing module, and a hearing aid information storage circuit connected with the hearing aid audio processing module.
4. A circuit for use in a hearing aid according to claim 3, wherein: the hearing aid audio processing module comprises an audio processing chip U4, the audio processing chip U4 adopts an HA320D chip for audio master control, the HA320D chip adopts a low-power-consumption design, the chip power consumption of the whole hearing aid audio processing module is less than 1.5mA, and the hearing aid audio processing module is provided with a 4-channel filter bank accelerating engine, a three-way ALU hardware accelerating engine, a three-way vector feature statistics hardware accelerating engine and a two-way algorithm hardware accelerating engine.
5. Circuit for application in hearing aids according to claim 4, characterized in that: the Bluetooth audio acquisition processing circuit comprises a Bluetooth master control circuit, a Bluetooth audio acquisition circuit and a crystal oscillator driving circuit which are respectively connected with the Bluetooth master control circuit, and further comprises an interface circuit connected with the Bluetooth master control circuit.
6. Circuit for application in hearing aids according to any of claims 1-5, characterized in that: the change-over switch is an audio frequency change-over analog switch circuit and comprises an analog switch, a first input pin 2 of the analog switch is connected with the output end of the hearing aid audio frequency acquisition processing circuit, second input pins 5 and 7 of the analog switch are connected with two signal output ends of the Bluetooth audio frequency acquisition processing circuit, and pins 3 and 9 of the analog switch are output pins.
7. Circuit for application in hearing aids according to any of claims 1-5, characterized in that: the output end of the earphone output control circuit is output to a rear-stage earphone amplifying circuit and is output to a loudspeaker for sounding after being processed.
8. The circuit of claim 7, wherein: the earphone output control circuit adopts an HT97220 main control chip to output audio.
9. Circuit for application in hearing aids according to any of claims 1-5, characterized in that: the power supply also comprises a voltage stabilizing LD0 voltage stabilizing circuit connected with the power supply and used for providing a stabilized voltage power supply for the whole circuit.
10. The circuit for use in a hearing aid according to claim 9, wherein: still include indicating circuit, indicating circuit includes first LED lamp and second LED lamp, the input of first LED lamp links to each other with bluetooth audio frequency collection processing circuit output, the input of second LED lamp links to each other with power output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121370722.8U CN214901308U (en) | 2021-06-18 | 2021-06-18 | Circuit applied to hearing aid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121370722.8U CN214901308U (en) | 2021-06-18 | 2021-06-18 | Circuit applied to hearing aid |
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| CN214901308U true CN214901308U (en) | 2021-11-26 |
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| CN202121370722.8U Active CN214901308U (en) | 2021-06-18 | 2021-06-18 | Circuit applied to hearing aid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114827828A (en) * | 2022-04-21 | 2022-07-29 | 深圳由我智声科技有限公司 | Bluetooth hearing aid earphone and control method thereof |
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2021
- 2021-06-18 CN CN202121370722.8U patent/CN214901308U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114827828A (en) * | 2022-04-21 | 2022-07-29 | 深圳由我智声科技有限公司 | Bluetooth hearing aid earphone and control method thereof |
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