BR7801935A - PROCESS FOR A SPEAKER-CONTROLLED PHONE - Google Patents
PROCESS FOR A SPEAKER-CONTROLLED PHONEInfo
- Publication number
- BR7801935A BR7801935A BR7801935A BR7801935A BR7801935A BR 7801935 A BR7801935 A BR 7801935A BR 7801935 A BR7801935 A BR 7801935A BR 7801935 A BR7801935 A BR 7801935A BR 7801935 A BR7801935 A BR 7801935A
- Authority
- BR
- Brazil
- Prior art keywords
- speaker
- controlled phone
- phone
- controlled
- Prior art date
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
- H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Circuit For Audible Band Transducer (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2714132A DE2714132C3 (en) | 1977-03-30 | 1977-03-30 | Circuit arrangement for a voice-controlled loudspeaker device |
Publications (1)
Publication Number | Publication Date |
---|---|
BR7801935A true BR7801935A (en) | 1979-05-22 |
Family
ID=6005133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR7801935A BR7801935A (en) | 1977-03-30 | 1978-03-29 | PROCESS FOR A SPEAKER-CONTROLLED PHONE |
Country Status (6)
Country | Link |
---|---|
AU (1) | AU501638B1 (en) |
BE (1) | BE865523A (en) |
BR (1) | BR7801935A (en) |
DE (1) | DE2714132C3 (en) |
FI (1) | FI64730C (en) |
IT (1) | IT1093691B (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3063165D1 (en) * | 1979-10-11 | 1983-06-16 | Marconi Co Ltd | A voice detector |
DE3148305A1 (en) * | 1981-12-03 | 1983-06-09 | Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin | CIRCUIT ARRANGEMENT FOR A HANDS-FREE UNIT |
DE3332305C2 (en) * | 1983-09-07 | 1987-03-05 | Siemens AG, 1000 Berlin und 8000 München | Method for controllable attenuation of digital signals |
US4715062A (en) * | 1985-03-22 | 1987-12-22 | Tie/Communications, Inc. | Speakerphone control circuit having low gain states and method for controlling gain of speakerphone |
DE3541794A1 (en) * | 1985-11-26 | 1987-05-27 | Siemens Ag | VOICE CONTROL IN A TELEPHONE STATION |
DE3728109C1 (en) * | 1987-08-22 | 1989-03-16 | Telefonbau & Normalzeit Gmbh | Method for voice-controlled attenuation control in telephone transmission circuits |
DE3908282A1 (en) * | 1989-03-14 | 1990-09-20 | Siemens Ag | SPEAK DIRECTION DETECTION IN A DIGITAL TELEPHONE STATION |
DE3908283C2 (en) * | 1989-03-14 | 1996-04-25 | Siemens Ag | Control of voice-controlled speech direction recognition |
DE3919345A1 (en) * | 1989-06-13 | 1990-12-20 | Siemens Ag | Attenuation control circuit for hands-free telephone station - has extra second comparator, whose minus input is coupled to tap for meter value |
DE4012354C2 (en) * | 1990-04-18 | 1995-06-22 | Siemens Ag | Handsfree telephone station |
DE19525705A1 (en) * | 1995-07-14 | 1997-01-16 | Bahram Adniazar | Optical wave guide telephone set - has automatic switching within each telephone device between transmission and reception modes depending on received speech signals |
-
1977
- 1977-03-30 DE DE2714132A patent/DE2714132C3/en not_active Expired
-
1978
- 1978-03-22 IT IT21471/78A patent/IT1093691B/en active
- 1978-03-29 BR BR7801935A patent/BR7801935A/en unknown
- 1978-03-29 FI FI780951A patent/FI64730C/en not_active IP Right Cessation
- 1978-03-30 AU AU34606/78A patent/AU501638B1/en not_active Expired
- 1978-03-30 BE BE186434A patent/BE865523A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
IT1093691B (en) | 1985-07-26 |
FI780951A (en) | 1978-10-01 |
FI64730C (en) | 1983-12-12 |
DE2714132A1 (en) | 1978-10-05 |
BE865523A (en) | 1978-10-02 |
AU501638B1 (en) | 1979-06-28 |
FI64730B (en) | 1983-08-31 |
DE2714132B2 (en) | 1979-06-13 |
IT7821471A0 (en) | 1978-03-22 |
DE2714132C3 (en) | 1980-02-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
PT67906B (en) | PROCESS FOR THE PREPARATION OF CEFEMIC DERIVATIVES. | |
BR7704895A (en) | TELEMERIZATION PROCESS FOR DIENOSES | |
BR7808130A (en) | PROCESS FOR PREPARING A TIRE | |
BR7807673A (en) | PROCESS FOR PREPARING NITRO-DIARYL-AMINE | |
IT7830237A0 (en) | PROCESS FOR PREPARING HYDROCARBONS. | |
BR7803953A (en) | PROCESS FOR ETHILATING A MONO-ALKYL-BENZENE | |
IT7822548A0 (en) | METANATION PROCESS. | |
IT7827253A0 (en) | PROCESS FOR CATALYST RECOVERY. | |
BR7801046A (en) | PROCESS FOR PREPARING ETERSULPHONATES | |
BR7801935A (en) | PROCESS FOR A SPEAKER-CONTROLLED PHONE | |
BR7802464A (en) | PROCESS FOR DE-NITROUSING N-NITROUS COMPOUNDS | |
YU41015B (en) | Process for obtainig 2-formqequinoxaline -1,4-dioxyde cyanoacetylhydrazone | |
BR7803631A (en) | HYDROCARBON RECOVERY PROCESS | |
BR7801867A (en) | PROCESS FOR THE PREPARATION OF 1-AZOLYL-3,3-DIMETHYL-1-PHENOXY-BUTANE-2-ONAS | |
IT7829061A0 (en) | PROCESS FOR PREPARING AROMATIC HYDROCARBONS. | |
BR7803346A (en) | PROCESS FOR OBTAINING TRIARYLMETAN DYES | |
BR7802624A (en) | PROCESS FOR OBTAINING POLYAMIDES DISCONTINUED | |
BR7802140A (en) | PROCESS FOR THE PREPARATION OF 2,3-DIMETHYLPENTANAL | |
BR7706639A (en) | PROCESS FOR THE PREPARATION OF ARALIFATIC, ANIONIC COMPOUNDS | |
BR7706374A (en) | PROCESS FOR PREPARING A COPOLIMER | |
IT7828803A0 (en) | PROCESS FOR PREPARING AROMATIC HYDROCARBONS. | |
BR7700240A (en) | PROCESS FOR OBTAINING REPLACED CYCLEALCANOPIRAZOILS | |
IT7820254A0 (en) | SAY SEPARATION PROCESS. | |
BR7807330A (en) | PROCESS FOR PREPARING CYCLE-PENTADIENE | |
BR7906029A (en) | PROCESS FOR OBTAINING N, N-DIMETHYLAMINOACETRILA |