BR7801935A - PROCESS FOR A SPEAKER-CONTROLLED PHONE - Google Patents

PROCESS FOR A SPEAKER-CONTROLLED PHONE

Info

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
Application number
BR7801935A
Other languages
Portuguese (pt)
Inventor
K Walla
S Guntersdorfer
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of BR7801935A publication Critical patent/BR7801935A/en

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
BR7801935A 1977-03-30 1978-03-29 PROCESS FOR A SPEAKER-CONTROLLED PHONE BR7801935A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0027343B1 (en) * 1979-10-11 1983-05-11 The Marconi Company Limited 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
DE3332305A1 (en) * 1983-09-07 1985-04-04 Siemens AG, 1000 Berlin und 8000 München Method of controllably attenuating 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
DE3908283C2 (en) * 1989-03-14 1996-04-25 Siemens Ag Control of voice-controlled speech direction recognition
DE3908282A1 (en) * 1989-03-14 1990-09-20 Siemens Ag SPEAK DIRECTION DETECTION IN A DIGITAL TELEPHONE STATION
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

Also Published As

Publication number Publication date
DE2714132A1 (en) 1978-10-05
DE2714132C3 (en) 1980-02-07
FI64730C (en) 1983-12-12
IT7821471A0 (en) 1978-03-22
IT1093691B (en) 1985-07-26
FI64730B (en) 1983-08-31
DE2714132B2 (en) 1979-06-13
FI780951A (en) 1978-10-01
BE865523A (en) 1978-10-02
AU501638B1 (en) 1979-06-28

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