FR696247A - Improvements to sound production or reproduction devices - Google Patents

Improvements to sound production or reproduction devices

Info

Publication number
FR696247A
FR696247A FR696247DA FR696247A FR 696247 A FR696247 A FR 696247A FR 696247D A FR696247D A FR 696247DA FR 696247 A FR696247 A FR 696247A
Authority
FR
France
Prior art keywords
sound production
reproduction devices
reproduction
devices
sound
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
Francois-Xavier-Loui
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 FR696247A publication Critical patent/FR696247A/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
    • H04R7/12—Non-planar diaphragms or cones

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR696247D 1929-09-07 1929-09-07 Improvements to sound production or reproduction devices Expired FR696247A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR696247T 1929-09-07

Publications (1)

Publication Number Publication Date
FR696247A true FR696247A (en) 1930-12-27

Family

ID=9046546

Family Applications (1)

Application Number Title Priority Date Filing Date
FR696247D Expired FR696247A (en) 1929-09-07 1929-09-07 Improvements to sound production or reproduction devices

Country Status (1)

Country Link
FR (1) FR696247A (en)

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