JPS5568792A - Hearing aid - Google Patents

Hearing aid

Info

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
Application number
JP14189478A
Other languages
Japanese (ja)
Inventor
Hidetoshi Komatsu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP14189478A priority Critical patent/JPS5568792A/en
Publication of JPS5568792A publication Critical patent/JPS5568792A/en
Pending legal-status Critical Current

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
JP14189478A 1978-11-17 1978-11-17 Hearing aid Pending JPS5568792A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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