BE770227A - Perfectionnement dans les postes telephoniques avec emission par microphone avec amplificateur et reception par - Google Patents

Perfectionnement dans les postes telephoniques avec emission par microphone avec amplificateur et reception par

Info

Publication number
BE770227A
BE770227A BE770227A BE770227A BE770227A BE 770227 A BE770227 A BE 770227A BE 770227 A BE770227 A BE 770227A BE 770227 A BE770227 A BE 770227A BE 770227 A BE770227 A BE 770227A
Authority
BE
Belgium
Prior art keywords
microphone
amplifier
reception
improvement
transmission
Prior art date
Application number
BE770227A
Other languages
English (en)
French (fr)
Original Assignee
Barok Albert
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 Barok Albert filed Critical Barok Albert
Publication of BE770227A publication Critical patent/BE770227A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Circuit For Audible Band Transducer (AREA)
BE770227A 1970-08-06 1971-07-20 Perfectionnement dans les postes telephoniques avec emission par microphone avec amplificateur et reception par BE770227A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7029610A FR2102614A5 (OSRAM) 1970-08-06 1970-08-06

Publications (1)

Publication Number Publication Date
BE770227A true BE770227A (fr) 1971-12-01

Family

ID=9060098

Family Applications (1)

Application Number Title Priority Date Filing Date
BE770227A BE770227A (fr) 1970-08-06 1971-07-20 Perfectionnement dans les postes telephoniques avec emission par microphone avec amplificateur et reception par

Country Status (8)

Country Link
US (1) US3787621A (OSRAM)
BE (1) BE770227A (OSRAM)
CA (1) CA976287A (OSRAM)
CH (1) CH546524A (OSRAM)
DE (1) DE2136313A1 (OSRAM)
ES (1) ES393619A1 (OSRAM)
FR (1) FR2102614A5 (OSRAM)
GB (1) GB1360227A (OSRAM)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2314631A1 (fr) * 1975-06-11 1977-01-07 Jeumont Schneider Procede et dispositif d'elimination de l'effet local d'un poste telephonique
FR2376576A1 (fr) * 1976-12-31 1978-07-28 Girard J Philippe Perfectionnements aux postes telephoniques a mains libres
JPS5489403A (en) * 1977-12-27 1979-07-16 Matsushita Electric Ind Co Ltd Signal control circuit
DE3213968C2 (de) * 1982-04-16 1984-06-14 Deutsche Fernsprecher Gesellschaft Mbh Marburg, 3550 Marburg Fernsprechapparat
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
FI78373C (fi) * 1988-01-18 1989-07-10 Sostel Oy Telefontrafik- eller dataoeverfoeringssystem.
US5020101A (en) * 1989-04-10 1991-05-28 Gregory R. Brotz Musicians telephone interface

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL125146C (OSRAM) * 1958-12-29
US3594507A (en) * 1969-10-22 1971-07-20 William T Clark Feedback eliminating device for audio amplifying systems
US3665106A (en) * 1970-04-28 1972-05-23 Research Corp Intercommunication system

Also Published As

Publication number Publication date
DE2136313A1 (de) 1972-02-10
GB1360227A (en) 1974-07-17
CA976287A (en) 1975-10-14
ES393619A1 (es) 1974-07-01
US3787621A (en) 1974-01-22
FR2102614A5 (OSRAM) 1972-04-07
CH546524A (fr) 1974-02-28

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