JPH0217981B2 - - Google Patents

Info

Publication number
JPH0217981B2
JPH0217981B2 JP56047537A JP4753781A JPH0217981B2 JP H0217981 B2 JPH0217981 B2 JP H0217981B2 JP 56047537 A JP56047537 A JP 56047537A JP 4753781 A JP4753781 A JP 4753781A JP H0217981 B2 JPH0217981 B2 JP H0217981B2
Authority
JP
Japan
Prior art keywords
signal
transducer
reference signal
acoustic
electro
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.)
Expired - Lifetime
Application number
JP56047537A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57162592A (en
Inventor
Akihiko Tsukudai
Hidenori Ito
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.)
NEC Corp
Original Assignee
Nippon Electric Co Ltd
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 Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP4753781A priority Critical patent/JPS57162592A/ja
Publication of JPS57162592A publication Critical patent/JPS57162592A/ja
Publication of JPH0217981B2 publication Critical patent/JPH0217981B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
JP4753781A 1981-03-31 1981-03-31 Echo preventing loudspeaking device Granted JPS57162592A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4753781A JPS57162592A (en) 1981-03-31 1981-03-31 Echo preventing loudspeaking device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4753781A JPS57162592A (en) 1981-03-31 1981-03-31 Echo preventing loudspeaking device

Publications (2)

Publication Number Publication Date
JPS57162592A JPS57162592A (en) 1982-10-06
JPH0217981B2 true JPH0217981B2 (enrdf_load_stackoverflow) 1990-04-24

Family

ID=12777877

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4753781A Granted JPS57162592A (en) 1981-03-31 1981-03-31 Echo preventing loudspeaking device

Country Status (1)

Country Link
JP (1) JPS57162592A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5225836A (en) * 1988-03-23 1993-07-06 Central Institute For The Deaf Electronic filters, repeated signal charge conversion apparatus, hearing aids and methods
US5357251A (en) * 1988-03-23 1994-10-18 Central Institute For The Deaf Electronic filters, signal conversion apparatus, hearing aids and methods

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS561649A (en) * 1979-06-19 1981-01-09 Nec Corp Conference telephone equipment

Also Published As

Publication number Publication date
JPS57162592A (en) 1982-10-06

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