BE738074A - - Google Patents

Info

Publication number
BE738074A
BE738074A BE738074DA BE738074A BE 738074 A BE738074 A BE 738074A BE 738074D A BE738074D A BE 738074DA BE 738074 A BE738074 A BE 738074A
Authority
BE
Belgium
Application number
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 NO336968A external-priority patent/NO123134B/no
Application filed filed Critical
Publication of BE738074A publication Critical patent/BE738074A/xx

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)
  • Circuit For Audible Band Transducer (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Amplifiers (AREA)
BE738074D 1968-08-29 1969-08-27 BE738074A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO336968A NO123134B (xx) 1968-08-29

Publications (1)

Publication Number Publication Date
BE738074A true BE738074A (xx) 1970-02-27

Family

ID=19879568

Family Applications (1)

Application Number Title Priority Date Filing Date
BE738074D BE738074A (xx) 1968-08-29 1969-08-27

Country Status (8)

Country Link
US (1) US3660603A (xx)
BE (1) BE738074A (xx)
CH (1) CH499934A (xx)
DK (1) DK132640C (xx)
FR (1) FR2016608A1 (xx)
GB (1) GB1250380A (xx)
NL (1) NL6912967A (xx)
SE (1) SE351350B (xx)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5242643B2 (xx) * 1973-10-18 1977-10-26
US4028506A (en) * 1973-12-12 1977-06-07 Nippon Electric Company, Ltd. Maximum value tracing circuit for digitized voice signals
JPS5411203B2 (xx) * 1974-05-02 1979-05-12
US3970786A (en) * 1974-06-27 1976-07-20 Stromberg-Carlson Corporation Loudspeaking telephone with improved receive sensitivity
US3963868A (en) * 1974-06-27 1976-06-15 Stromberg-Carlson Corporation Loudspeaking telephone hysteresis and ambient noise control
US3953676A (en) * 1974-12-12 1976-04-27 Northern Electric Company, Limited Digital control of a loudspeaking telephone system
US4025728A (en) * 1976-01-29 1977-05-24 Sava Jacobson Speaker telephone
US4465902A (en) * 1982-10-08 1984-08-14 Zenith Electronics Corporation Digital space phone system
US4542263A (en) * 1984-03-07 1985-09-17 Oki Electric Industry Co., Ltd. Speech control circuit
US4980908A (en) * 1989-05-30 1990-12-25 Voicetek Corporation Voice-switched gain control for voice communication equipment connected to telephone lines
JPH06338934A (ja) * 1993-05-25 1994-12-06 Exar Corp 事象駆動型制御回路を有するスピーカーホーン

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB668858A (en) * 1949-04-29 1952-03-26 Telephone Mfg Co Ltd Improvements in and relating to electrical communication systems
US3075045A (en) * 1960-08-29 1963-01-22 Bell Telephone Labor Inc Speakerphone
US3113181A (en) * 1960-11-25 1963-12-03 Ericsson Telefon Ab L M Amplifier arrangement
DE1281499B (de) * 1966-03-23 1968-10-31 Siemens Ag Schaltungsanordnung fuer sprachgesteuerte Freisprechgeraete mit veraenderbarem Daempfungshub

Also Published As

Publication number Publication date
DE1942814A1 (de) 1970-05-06
NL6912967A (xx) 1970-03-03
GB1250380A (xx) 1971-10-20
CH499934A (de) 1970-11-30
SE351350B (xx) 1972-11-20
US3660603A (en) 1972-05-02
DK132640C (da) 1976-06-08
FR2016608A1 (xx) 1970-05-08
DK132640B (da) 1976-01-12
DE1942814B2 (de) 1976-10-14

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Legal Events

Date Code Title Description
RE20 Patent expired

Owner name: N.V. PHILIPS GLOEILAMPENFABRIEKEN

Effective date: 19890827