BE478694A - - Google Patents

Info

Publication number
BE478694A
BE478694A BE478694DA BE478694A BE 478694 A BE478694 A BE 478694A BE 478694D A BE478694D A BE 478694DA BE 478694 A BE478694 A BE 478694A
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
Application filed filed Critical
Publication of BE478694A publication Critical patent/BE478694A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • H04R3/08—Circuits for transducers, loudspeakers or microphones for correcting frequency response of electromagnetic transducers
    • 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
    • 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
    • H04M9/087—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using different frequency bands for transmitting and receiving paths ; using phase shifting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Acoustics & Sound (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
BE478694D 1945-03-29 1947-12-24 BE478694A (cg-RX-API-DMAC7.html)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2606252X 1945-03-29
GB8031/45A GB597170A (en) 1945-03-29 1947-08-08 Improvements in loud-speaking telephone arrangements

Publications (1)

Publication Number Publication Date
BE478694A true BE478694A (cg-RX-API-DMAC7.html) 1948-06-24

Family

ID=32232360

Family Applications (1)

Application Number Title Priority Date Filing Date
BE478694D BE478694A (cg-RX-API-DMAC7.html) 1945-03-29 1947-12-24

Country Status (6)

Country Link
US (1) US2606252A (cg-RX-API-DMAC7.html)
BE (1) BE478694A (cg-RX-API-DMAC7.html)
CH (1) CH266245A (cg-RX-API-DMAC7.html)
DE (1) DE828710C (cg-RX-API-DMAC7.html)
FR (1) FR1015515A (cg-RX-API-DMAC7.html)
GB (1) GB597170A (cg-RX-API-DMAC7.html)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2606252A (en) * 1945-03-29 1952-08-05 Hartford Nat Bank & Trust Co Loud-speaking telephone arrangement

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2205142A (en) * 1937-02-03 1940-06-18 Holtzer Cabot Electric Co Loudspeaking telephone system
GB508031A (en) * 1937-12-23 1939-06-23 Automatic Telephone & Elect Improvements in or relating to telephone systems
US2199220A (en) * 1939-07-18 1940-04-30 French Hubert Interstation communication system
US2264311A (en) * 1939-08-14 1941-12-02 Associated Electric Lab Inc Transmission system
BE467440A (cg-RX-API-DMAC7.html) * 1942-03-12
US2606252A (en) * 1945-03-29 1952-08-05 Hartford Nat Bank & Trust Co Loud-speaking telephone arrangement

Also Published As

Publication number Publication date
DE828710C (de) 1952-01-21
FR1015515A (fr) 1952-10-28
GB597170A (en) 1948-01-20
US2606252A (en) 1952-08-05
CH266245A (de) 1950-01-15

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