FR748993A - Improvement in methods and devices for recording sounds - Google Patents

Improvement in methods and devices for recording sounds

Info

Publication number
FR748993A
FR748993A FR748993DA FR748993A FR 748993 A FR748993 A FR 748993A FR 748993D A FR748993D A FR 748993DA FR 748993 A FR748993 A FR 748993A
Authority
FR
France
Prior art keywords
improvement
methods
devices
recording sounds
sounds
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
Henry Joseph Round
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 FR748993A publication Critical patent/FR748993A/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
FR748993D 1932-01-12 1933-01-12 Improvement in methods and devices for recording sounds Expired FR748993A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB748993X 1932-01-12

Publications (1)

Publication Number Publication Date
FR748993A true FR748993A (en) 1933-07-13

Family

ID=10496177

Family Applications (1)

Application Number Title Priority Date Filing Date
FR748993D Expired FR748993A (en) 1932-01-12 1933-01-12 Improvement in methods and devices for recording sounds

Country Status (1)

Country Link
FR (1) FR748993A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE755392C (en) * 1937-04-30 1954-02-15 Klangfilm G M B H Frequency film for checking the gap in sound film devices while the film is running

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE755392C (en) * 1937-04-30 1954-02-15 Klangfilm G M B H Frequency film for checking the gap in sound film devices while the film is running

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