FR738053A - Improvements in sound recording and reproduction - Google Patents

Improvements in sound recording and reproduction

Info

Publication number
FR738053A
FR738053A FR738053DA FR738053A FR 738053 A FR738053 A FR 738053A FR 738053D A FR738053D A FR 738053DA FR 738053 A FR738053 A FR 738053A
Authority
FR
France
Prior art keywords
reproduction
sound recording
sound
recording
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
James Fleming Herd
Frederick Edward Lutkin
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 FR738053A publication Critical patent/FR738053A/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
FR738053D 1931-06-04 1932-06-02 Improvements in sound recording and reproduction Expired FR738053A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB738053X 1931-06-04

Publications (1)

Publication Number Publication Date
FR738053A true FR738053A (en) 1932-12-20

Family

ID=10495828

Family Applications (1)

Application Number Title Priority Date Filing Date
FR738053D Expired FR738053A (en) 1931-06-04 1932-06-02 Improvements in sound recording and reproduction

Country Status (1)

Country Link
FR (1) FR738053A (en)

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