FR596667A - telephone headphones, loudspeakers, phonographs and similar apparatus - Google Patents

telephone headphones, loudspeakers, phonographs and similar apparatus

Info

Publication number
FR596667A
FR596667A FR596667DA FR596667A FR 596667 A FR596667 A FR 596667A FR 596667D A FR596667D A FR 596667DA FR 596667 A FR596667 A FR 596667A
Authority
FR
France
Prior art keywords
phonographs
loudspeakers
similar apparatus
headphones
telephone
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
Other languages
French (fr)
Inventor
Maurice Loiseau
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
Application granted granted Critical
Publication of FR596667A publication Critical patent/FR596667A/en
Expired legal-status Critical Current

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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR596667D 1925-03-11 1925-03-11 telephone headphones, loudspeakers, phonographs and similar apparatus Expired FR596667A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR596667T 1925-03-11

Publications (1)

Publication Number Publication Date
FR596667A true FR596667A (en) 1925-10-29

Family

ID=8967697

Family Applications (1)

Application Number Title Priority Date Filing Date
FR596667D Expired FR596667A (en) 1925-03-11 1925-03-11 telephone headphones, loudspeakers, phonographs and similar apparatus

Country Status (1)

Country Link
FR (1) FR596667A (en)

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