JPS5568793A - Hearing aid - Google Patents

Hearing aid

Info

Publication number
JPS5568793A
JPS5568793A JP14298978A JP14298978A JPS5568793A JP S5568793 A JPS5568793 A JP S5568793A JP 14298978 A JP14298978 A JP 14298978A JP 14298978 A JP14298978 A JP 14298978A JP S5568793 A JPS5568793 A JP S5568793A
Authority
JP
Japan
Prior art keywords
signal
earphone
dynamic range
sound pressure
input
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
JP14298978A
Other languages
Japanese (ja)
Inventor
Kenji Aoki
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 JP14298978A priority Critical patent/JPS5568793A/en
Publication of JPS5568793A publication Critical patent/JPS5568793A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/35—Electric hearing aids using translation techniques
    • H04R25/356—Amplitude, e.g. amplitude shift or compression

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE:To realize the protection of the ear with no distortion of the reproduction signal by obtaining the digital signal proportional to the input sound pressure level to control the input signal level and thus to obtain the optional dynamic range suitable for hearing. CONSTITUTION:The input signal of microphone 24 receives amplification 25 of about 20dB and is then given the fixed attenuation at control part 27 to be then applied to earphone 31 via volume 28 plus amplifiers 29 and 30. Amplifier 25 comprises amplifier part 33, rectifying and smoothing part 34, and A/D converter 35 each, and generates 26 the digital signal proportional to the input sound pressure level to then supply it to part 27. As a result, the signal of the proper dynamic range can be applied to earphone 31.
JP14298978A 1978-11-20 1978-11-20 Hearing aid Pending JPS5568793A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14298978A JPS5568793A (en) 1978-11-20 1978-11-20 Hearing aid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14298978A JPS5568793A (en) 1978-11-20 1978-11-20 Hearing aid

Publications (1)

Publication Number Publication Date
JPS5568793A true JPS5568793A (en) 1980-05-23

Family

ID=15328340

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14298978A Pending JPS5568793A (en) 1978-11-20 1978-11-20 Hearing aid

Country Status (1)

Country Link
JP (1) JPS5568793A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58151800A (en) * 1982-02-17 1983-09-09 ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Hearing aid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58151800A (en) * 1982-02-17 1983-09-09 ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Hearing aid

Similar Documents

Publication Publication Date Title
GB1504065A (en) Headphone
JPS56147525A (en) Reception playback system
MY106871A (en) Noise reducing receiver device.
ES8202211A1 (en) MFB system with a by-pass network.
MY128422A (en) Active headset
GB1404279A (en) Acoustic feedback stabilization system particularly suited for hearing aids
JPS5568793A (en) Hearing aid
ES2000559A6 (en) Method for suppressing feedback in electroacoustic installations and arrangement for carrying out this method.
JPS5541036A (en) Hearing-aid unit
JP2821610B2 (en) Headphone equipment
JPS5666919A (en) Automatic corrector for sound field
SE8402056L (en) DEVICE FOR EXTENDING THE DYNAMIC AREA IN AN INTEGRATING OPTICAL ELECTRIC RECEIVER
JPH047141B2 (en)
JPS5760800A (en) Tone quality adjusting circuit
JPS6444199A (en) Acoustic system provided with multiway speaker
JPS5610793A (en) Headphone unit
JP2821609B2 (en) Headphone equipment
JPS57188169A (en) Audio switch device
JPS5514774A (en) Output limit amplifier circuit
JPS5210050A (en) Linear amplifier
SU288859A1 (en) A way to develop hearing and speech in deaf people
JPS5799811A (en) Automatic sound volume adjusting device
JPS5210051A (en) Feed forward amplifier
RU2004078C1 (en) Capacitor microphone for simulating amplitude-frequency response of hearing
JPS5426608A (en) Howling prevention unit