JPS5426608A - Howling prevention unit - Google Patents

Howling prevention unit

Info

Publication number
JPS5426608A
JPS5426608A JP9196077A JP9196077A JPS5426608A JP S5426608 A JPS5426608 A JP S5426608A JP 9196077 A JP9196077 A JP 9196077A JP 9196077 A JP9196077 A JP 9196077A JP S5426608 A JPS5426608 A JP S5426608A
Authority
JP
Japan
Prior art keywords
prevention unit
howling prevention
howling
microphone
gain
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.)
Granted
Application number
JP9196077A
Other languages
Japanese (ja)
Other versions
JPS5952874B2 (en
Inventor
Yuzo Fuse
Junkichi Sugita
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP9196077A priority Critical patent/JPS5952874B2/en
Publication of JPS5426608A publication Critical patent/JPS5426608A/en
Publication of JPS5952874B2 publication Critical patent/JPS5952874B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/20—Arrangements for preventing acoustic feed-back

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE:To prevent howling with a simple constitution, by controlling the gain of amplifier at the leading of audio signal of the microphone in an amplifying circuit system.
JP9196077A 1977-07-29 1977-07-29 Howling prevention device Expired JPS5952874B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9196077A JPS5952874B2 (en) 1977-07-29 1977-07-29 Howling prevention device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9196077A JPS5952874B2 (en) 1977-07-29 1977-07-29 Howling prevention device

Publications (2)

Publication Number Publication Date
JPS5426608A true JPS5426608A (en) 1979-02-28
JPS5952874B2 JPS5952874B2 (en) 1984-12-21

Family

ID=14041120

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9196077A Expired JPS5952874B2 (en) 1977-07-29 1977-07-29 Howling prevention device

Country Status (1)

Country Link
JP (1) JPS5952874B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61286243A (en) * 1985-06-07 1986-12-16 Tatsuta Electric Wire & Cable Co Ltd Preparation of optical fiber
JPH0626380B1 (en) * 1988-12-16 1994-04-06 Nippon Electric Co

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61286243A (en) * 1985-06-07 1986-12-16 Tatsuta Electric Wire & Cable Co Ltd Preparation of optical fiber
JPH0626380B1 (en) * 1988-12-16 1994-04-06 Nippon Electric Co

Also Published As

Publication number Publication date
JPS5952874B2 (en) 1984-12-21

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