JPS5568792A - Hearing aid - Google Patents
Hearing aidInfo
- Publication number
- JPS5568792A JPS5568792A JP14189478A JP14189478A JPS5568792A JP S5568792 A JPS5568792 A JP S5568792A JP 14189478 A JP14189478 A JP 14189478A JP 14189478 A JP14189478 A JP 14189478A JP S5568792 A JPS5568792 A JP S5568792A
- Authority
- JP
- Japan
- Prior art keywords
- hearing aid
- output
- detector circuit
- noise
- amplifier
- 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.)
- Pending
Links
Landscapes
- Circuit For Audible Band Transducer (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
PURPOSE: To protect the ear of the user by discontinuing the amplifying function with the output of the impact sound detector circuit.
CONSTITUTION: The input signal is applied directly to differential amplifier 21 in the impact sound detector circuit of the hearing aid along with the envelope detected through elements 22∼24. Thus only the noise is obtained at the output of amplifier 21 when the impulsive noise is piled on the input signal. The output of the noise detector circuit is supplied to at least more than one of switches 34∼ 37 connected to the input and the output of amplifier circuit 31 of the hearing aid or the power source, thus securing the OFF control. In such way, the ear can be protected for the user of the hearing aid.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14189478A JPS5568792A (en) | 1978-11-17 | 1978-11-17 | Hearing aid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14189478A JPS5568792A (en) | 1978-11-17 | 1978-11-17 | Hearing aid |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5568792A true JPS5568792A (en) | 1980-05-23 |
Family
ID=15302631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14189478A Pending JPS5568792A (en) | 1978-11-17 | 1978-11-17 | Hearing aid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5568792A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4759071A (en) * | 1986-08-14 | 1988-07-19 | Richards Medical Company | Automatic noise eliminator for hearing aids |
JPS6473900A (en) * | 1987-09-14 | 1989-03-20 | Rion Co | Hearing aid |
-
1978
- 1978-11-17 JP JP14189478A patent/JPS5568792A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4759071A (en) * | 1986-08-14 | 1988-07-19 | Richards Medical Company | Automatic noise eliminator for hearing aids |
JPS6473900A (en) * | 1987-09-14 | 1989-03-20 | Rion Co | Hearing aid |
JPH0578240B2 (en) * | 1987-09-14 | 1993-10-28 | Rion Co |
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