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 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

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

Publications (1)

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

Family

ID=19879568

Family Applications (1)

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

Country Status (8)

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

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5242643B2 (enrdf_load_stackoverflow) * 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 (enrdf_load_stackoverflow) * 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
SE351350B (enrdf_load_stackoverflow) 1972-11-20
DE1942814B2 (de) 1976-10-14
DK132640C (da) 1976-06-08
NL6912967A (enrdf_load_stackoverflow) 1970-03-03
DE1942814A1 (de) 1970-05-06
DK132640B (da) 1976-01-12
GB1250380A (enrdf_load_stackoverflow) 1971-10-20
US3660603A (en) 1972-05-02
FR2016608A1 (enrdf_load_stackoverflow) 1970-05-08
CH499934A (de) 1970-11-30

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Legal Events

Date Code Title Description
RE20 Patent expired

Owner name: N.V. PHILIPS GLOEILAMPENFABRIEKEN

Effective date: 19890827