DE3261682D1 - Device for avoiding sustained disturbing oscillations in a closed-loop system and loud-speaking telephone apparatus utilising this device - Google Patents

Device for avoiding sustained disturbing oscillations in a closed-loop system and loud-speaking telephone apparatus utilising this device

Info

Publication number
DE3261682D1
DE3261682D1 DE8282200544T DE3261682T DE3261682D1 DE 3261682 D1 DE3261682 D1 DE 3261682D1 DE 8282200544 T DE8282200544 T DE 8282200544T DE 3261682 T DE3261682 T DE 3261682T DE 3261682 D1 DE3261682 D1 DE 3261682D1
Authority
DE
Germany
Prior art keywords
loud
closed
loop system
telephone apparatus
apparatus utilising
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
Application number
DE8282200544T
Other languages
English (en)
Inventor
Gilbert Ferrieu
Yves Hetet
Jacques Balch
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.)
Telecommunications Radioelectriques et Telephoniques SA TRT
Original Assignee
Telecommunications Radioelectriques et Telephoniques SA TRT
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
Priority claimed from FR8109190A external-priority patent/FR2505587A1/fr
Priority claimed from FR8119155A external-priority patent/FR2514595A1/fr
Application filed by Telecommunications Radioelectriques et Telephoniques SA TRT filed Critical Telecommunications Radioelectriques et Telephoniques SA TRT
Application granted granted Critical
Publication of DE3261682D1 publication Critical patent/DE3261682D1/de
Expired 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
    • 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

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)
DE8282200544T 1981-05-08 1982-05-06 Device for avoiding sustained disturbing oscillations in a closed-loop system and loud-speaking telephone apparatus utilising this device Expired DE3261682D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8109190A FR2505587A1 (fr) 1981-05-08 1981-05-08 Dispositif destine a eviter des oscillations entretenues genantes dans un systeme boucle
FR8119155A FR2514595A1 (fr) 1981-10-12 1981-10-12 Poste telephonique " mains libres " a gains commutables sur les deux voies de parole

Publications (1)

Publication Number Publication Date
DE3261682D1 true DE3261682D1 (en) 1985-02-07

Family

ID=26222382

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8282200544T Expired DE3261682D1 (en) 1981-05-08 1982-05-06 Device for avoiding sustained disturbing oscillations in a closed-loop system and loud-speaking telephone apparatus utilising this device

Country Status (5)

Country Link
EP (1) EP0065335B1 (de)
JP (1) JPH0662104A (de)
AU (1) AU547891B2 (de)
CA (1) CA1190984A (de)
DE (1) DE3261682D1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2514595A1 (fr) * 1981-10-12 1983-04-15 Trt Telecom Radio Electr Poste telephonique " mains libres " a gains commutables sur les deux voies de parole
FR2505587A1 (fr) * 1981-05-08 1982-11-12 Trt Telecom Radio Electr Dispositif destine a eviter des oscillations entretenues genantes dans un systeme boucle
DE3875650D1 (de) * 1987-05-15 1992-12-10 Standard Elektrik Lorenz Ag Schaltungsanordnung zur sprachsteuerung fuer ein endgeraet der nachrichtentechnik.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1156113B (de) * 1958-02-28 1963-10-24 Siemens Ag Schaltungsanordnung fuer Fernsprechanlagen mit einer sprachgesteuerten Rueckkopplungssperre
GB1349734A (en) * 1969-11-07 1974-04-10 Post Office Arrangements for amplifying and reproducing audio frequency signals
JPS5529676Y2 (de) * 1975-07-03 1980-07-15
NL7612358A (nl) * 1976-11-08 1978-05-10 Philips Nv Versterkerinrichting voor akoestische signalen voorzien van middelen voor het onderdrukken van ongewenste stoorsignalen.

Also Published As

Publication number Publication date
JPH0662104A (ja) 1994-03-04
CA1190984A (en) 1985-07-23
AU547891B2 (en) 1985-11-07
AU8346982A (en) 1982-11-11
EP0065335A1 (de) 1982-11-24
EP0065335B1 (de) 1984-12-27

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Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee