FR852164A - Improvements in photoelectric devices for recording and reproducing sound - Google Patents

Improvements in photoelectric devices for recording and reproducing sound

Info

Publication number
FR852164A
FR852164A FR852164DA FR852164A FR 852164 A FR852164 A FR 852164A FR 852164D A FR852164D A FR 852164DA FR 852164 A FR852164 A FR 852164A
Authority
FR
France
Prior art keywords
recording
reproducing sound
photoelectric devices
photoelectric
reproducing
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
Gunnar Erik Magnus Corin
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 FR852164A publication Critical patent/FR852164A/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
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/008—Transducers other than those covered by groups H04R9/00 - H04R21/00 using optical signals for detecting or generating sound

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR852164D 1938-03-28 1939-03-27 Improvements in photoelectric devices for recording and reproducing sound Expired FR852164A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE852164X 1938-03-28

Publications (1)

Publication Number Publication Date
FR852164A true FR852164A (en) 1940-01-25

Family

ID=20362685

Family Applications (1)

Application Number Title Priority Date Filing Date
FR852164D Expired FR852164A (en) 1938-03-28 1939-03-27 Improvements in photoelectric devices for recording and reproducing sound

Country Status (1)

Country Link
FR (1) FR852164A (en)

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