FR664391A - Improvements to the processes and devices used for sound reproduction - Google Patents

Improvements to the processes and devices used for sound reproduction

Info

Publication number
FR664391A
FR664391A FR664391DA FR664391A FR 664391 A FR664391 A FR 664391A FR 664391D A FR664391D A FR 664391DA FR 664391 A FR664391 A FR 664391A
Authority
FR
France
Prior art keywords
processes
devices used
sound reproduction
reproduction
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
Alfred Lanser
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 FR664391A publication Critical patent/FR664391A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
FR664391D 1928-11-21 1928-11-21 Improvements to the processes and devices used for sound reproduction Expired FR664391A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR664391T 1928-11-21

Publications (1)

Publication Number Publication Date
FR664391A true FR664391A (en) 1929-09-02

Family

ID=9012636

Family Applications (1)

Application Number Title Priority Date Filing Date
FR664391D Expired FR664391A (en) 1928-11-21 1928-11-21 Improvements to the processes and devices used for sound reproduction

Country Status (1)

Country Link
FR (1) FR664391A (en)

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