BE506590A - - Google Patents

Info

Publication number
BE506590A
BE506590A BE506590DA BE506590A BE 506590 A BE506590 A BE 506590A BE 506590D A BE506590D A BE 506590DA BE 506590 A BE506590 A BE 506590A
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.)
Publication of BE506590A publication Critical patent/BE506590A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive loop type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00—Public address systems
    • H04R27/02—Amplifying systems for the deaf
BE506590D 1949-07-27 BE506590A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1974849A GB674753A (en) 1949-07-27 1949-07-27 Improvements relating to sound-reproducing systems

Publications (1)

Publication Number Publication Date
BE506590A true BE506590A (fr)

Family

ID=10134543

Family Applications (1)

Application Number Title Priority Date Filing Date
BE506590D BE506590A (fr) 1949-07-27

Country Status (4)

Country Link
BE (1) BE506590A (fr)
DE (1) DE969603C (fr)
FR (1) FR1022470A (fr)
GB (1) GB674753A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0296092A2 (fr) * 1987-06-19 1988-12-21 George Geladakis Dispositif pour écouteurs sans fil, sans batterie et circuits électroniques applicables dans des systèmes audio ou audio-visuels

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3255903B1 (fr) 2009-08-03 2022-12-07 IMAX Corporation Systèmes et procédés permettant de surveiller des haut-parleurs de cinéma et compenser les problèmes de qualité

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB498468A (en) * 1937-07-05 1939-01-05 Joseph Poliakoff Improved method of and apparatus for the transmission of speech and other sounds

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0296092A2 (fr) * 1987-06-19 1988-12-21 George Geladakis Dispositif pour écouteurs sans fil, sans batterie et circuits électroniques applicables dans des systèmes audio ou audio-visuels
EP0296092A3 (fr) * 1987-06-19 1989-08-16 George Geladakis Dispositif pour écouteurs sans fil, sans batterie et circuits électroniques applicables dans des systèmes audio ou audio-visuels

Also Published As

Publication number Publication date
FR1022470A (fr) 1953-03-05
DE969603C (de) 1958-06-26
GB674753A (en) 1952-07-02

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