FR685841A - Improvements to sound reproduction devices - Google Patents

Improvements to sound reproduction devices

Info

Publication number
FR685841A
FR685841A FR685841DA FR685841A FR 685841 A FR685841 A FR 685841A FR 685841D A FR685841D A FR 685841DA FR 685841 A FR685841 A FR 685841A
Authority
FR
France
Prior art keywords
sound reproduction
reproduction devices
devices
sound
reproduction
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
Pietro Anelli
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 FR685841A publication Critical patent/FR685841A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR685841D 1929-08-07 1929-11-30 Improvements to sound reproduction devices Expired FR685841A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT685841X 1929-08-07

Publications (1)

Publication Number Publication Date
FR685841A true FR685841A (en) 1930-07-17

Family

ID=11309934

Family Applications (1)

Application Number Title Priority Date Filing Date
FR685841D Expired FR685841A (en) 1929-08-07 1929-11-30 Improvements to sound reproduction devices

Country Status (1)

Country Link
FR (1) FR685841A (en)

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