AU535815B2 - Acoustic feedback suppression circuit - Google Patents

Acoustic feedback suppression circuit

Info

Publication number
AU535815B2
AU535815B2 AU67534/81A AU6753481A AU535815B2 AU 535815 B2 AU535815 B2 AU 535815B2 AU 67534/81 A AU67534/81 A AU 67534/81A AU 6753481 A AU6753481 A AU 6753481A AU 535815 B2 AU535815 B2 AU 535815B2
Authority
AU
Australia
Prior art keywords
suppression circuit
acoustic feedback
feedback suppression
acoustic
circuit
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.)
Ceased
Application number
AU67534/81A
Other versions
AU6753481A (en
Inventor
Alexander Balanescu
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of AU6753481A publication Critical patent/AU6753481A/en
Application granted granted Critical
Publication of AU535815B2 publication Critical patent/AU535815B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)
  • Amplifiers (AREA)
AU67534/81A 1980-02-29 1981-02-23 Acoustic feedback suppression circuit Ceased AU535815B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803007632 DE3007632A1 (en) 1980-02-29 1980-02-29 CIRCUIT ARRANGEMENT FOR PREVENTING FEEDBACK IN TELEPHONE APPARATUS WITH HANDS-FREE AND / OR COLLECTIBILITY
DE30076325 1980-02-29

Publications (2)

Publication Number Publication Date
AU6753481A AU6753481A (en) 1981-09-03
AU535815B2 true AU535815B2 (en) 1984-04-05

Family

ID=6095850

Family Applications (1)

Application Number Title Priority Date Filing Date
AU67534/81A Ceased AU535815B2 (en) 1980-02-29 1981-02-23 Acoustic feedback suppression circuit

Country Status (4)

Country Link
AU (1) AU535815B2 (en)
DE (1) DE3007632A1 (en)
GB (1) GB2073555A (en)
NZ (1) NZ196279A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3510352C1 (en) * 1985-03-22 1986-09-11 ANT Nachrichtentechnik GmbH, 7150 Backnang Intercom transmission device
DE3917296A1 (en) * 1989-05-27 1990-11-29 Emmerich Christoph Gmbh Co Kg Electric hybrid circuit for telephone installations - has electronic changeover switch for transmitter and receiver coupling to two=wire line
DE4021206A1 (en) * 1990-07-03 1992-01-09 Emmerich Christoph Gmbh Co Kg Two=way communication system - provides link between door located microphone and loudspeaker and telephone to serve as entry phone
FR2690806A1 (en) * 1992-05-04 1993-11-05 Piccaluga Pierre Method and apparatus for mitigating the disadvantages of the feedback or echo effect and improving the sound definition of acoustic transducers.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944743A (en) * 1974-01-07 1976-03-16 Plantronics, Inc. Method and apparatus for feedback suppression
DE2439740C3 (en) * 1974-08-19 1978-08-24 Siemens Ag, 1000 Berlin Und 8000 Muenchen Circuit arrangement for voice-controlled hands-free devices with different attenuation levels depending on the voice voltages for each voice channel and each direction of speech
NO134477C (en) * 1974-10-29 1976-10-13 Manus Max
US4025728A (en) * 1976-01-29 1977-05-24 Sava Jacobson Speaker telephone

Also Published As

Publication number Publication date
DE3007632A1 (en) 1981-09-10
NZ196279A (en) 1983-11-18
AU6753481A (en) 1981-09-03
GB2073555A (en) 1981-10-14

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