FR2514595B3 - - Google Patents
Info
- Publication number
- FR2514595B3 FR2514595B3 FR8119155A FR8119155A FR2514595B3 FR 2514595 B3 FR2514595 B3 FR 2514595B3 FR 8119155 A FR8119155 A FR 8119155A FR 8119155 A FR8119155 A FR 8119155A FR 2514595 B3 FR2514595 B3 FR 2514595B3
- Authority
- FR
- France
- 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
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)
- Circuit For Audible Band Transducer (AREA)
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8119155A FR2514595A1 (fr) | 1981-10-12 | 1981-10-12 | Poste telephonique " mains libres " a gains commutables sur les deux voies de parole |
| CA000402425A CA1190984A (en) | 1981-05-08 | 1982-05-06 | Arrangement for avoiding undsirable oscillations in a closed-loop system and loud-speaking telephone set employing this arrangement |
| EP19820200544 EP0065335B1 (fr) | 1981-05-08 | 1982-05-06 | Dispositif destiné à éviter des oscillations entretenues gênantes dans un système bouclé et poste téléphonique à haut-parleur utilisant ce dispositif |
| DE8282200544T 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 |
| AU83469/82A AU547891B2 (en) | 1981-05-08 | 1982-05-06 | Closed loop gain control |
| US06/376,888 US4454384A (en) | 1981-10-12 | 1982-05-10 | Hands free telephone with switchable gain in the two speech signal paths |
| JP7717191A JPH0662104A (ja) | 1981-05-08 | 1991-03-18 | 拡声電話機 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8119155A FR2514595A1 (fr) | 1981-10-12 | 1981-10-12 | Poste telephonique " mains libres " a gains commutables sur les deux voies de parole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2514595A1 FR2514595A1 (fr) | 1983-04-15 |
| FR2514595B3 true FR2514595B3 (US07534539-20090519-C00280.png) | 1984-05-25 |
Family
ID=9262955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8119155A Granted FR2514595A1 (fr) | 1981-05-08 | 1981-10-12 | Poste telephonique " mains libres " a gains commutables sur les deux voies de parole |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4454384A (US07534539-20090519-C00280.png) |
| FR (1) | FR2514595A1 (US07534539-20090519-C00280.png) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4629829A (en) * | 1984-12-14 | 1986-12-16 | Motorola, Inc. | Full duplex speakerphone for radio and landline telephones |
| US4724386A (en) * | 1985-09-30 | 1988-02-09 | Picker International, Inc. | Centrally ordered phase encoding |
| WO1987001546A1 (en) * | 1985-09-03 | 1987-03-12 | Motorola, Inc. | Hands-free control system for a radiotelephone |
| FR2731123B1 (fr) * | 1995-02-27 | 1997-05-09 | Prescom Sarl | Correction de gain de haut-parleur pour un terminal telephonique mains-libres |
| US9780752B2 (en) | 2011-06-01 | 2017-10-03 | Tdk Corporation | Assembly with an analog data processing unit and method of using same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3825843A (en) * | 1973-06-08 | 1974-07-23 | Bell Telephone Labor Inc | Selective distortion compensation circuit |
| US4081622A (en) * | 1976-10-29 | 1978-03-28 | Technex International Ltd. | Electronic circuit for a speakerphone |
| US4064462A (en) * | 1976-12-29 | 1977-12-20 | Dukane Corporation | Acoustic feedback peak elimination unit |
| US4081620A (en) * | 1977-05-20 | 1978-03-28 | Bell Telephone Laboratories, Incorporated | Sidetone control circuit for a telephone set |
| DE3261682D1 (en) * | 1981-05-08 | 1985-02-07 | Trt Telecom Radio Electr | Device for avoiding sustained disturbing oscillations in a closed-loop system and loud-speaking telephone apparatus utilising this device |
| US4382398A (en) * | 1981-05-29 | 1983-05-10 | Peavey Electronics Corp. | Method and apparatus for eliminating feedback in stage monitors |
-
1981
- 1981-10-12 FR FR8119155A patent/FR2514595A1/fr active Granted
-
1982
- 1982-05-10 US US06/376,888 patent/US4454384A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US4454384A (en) | 1984-06-12 |
| FR2514595A1 (fr) | 1983-04-15 |
