FR681303A - Method and apparatus for recording and reproducing sound - Google Patents

Method and apparatus for recording and reproducing sound

Info

Publication number
FR681303A
FR681303A FR681303DA FR681303A FR 681303 A FR681303 A FR 681303A FR 681303D A FR681303D A FR 681303DA FR 681303 A FR681303 A FR 681303A
Authority
FR
France
Prior art keywords
recording
reproducing sound
reproducing
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)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
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 by Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Application granted granted Critical
Publication of FR681303A publication Critical patent/FR681303A/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
FR681303D 1928-09-07 1929-09-04 Method and apparatus for recording and reproducing sound Expired FR681303A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB681303X 1928-09-07

Publications (1)

Publication Number Publication Date
FR681303A true FR681303A (en) 1930-05-13

Family

ID=10492467

Family Applications (1)

Application Number Title Priority Date Filing Date
FR681303D Expired FR681303A (en) 1928-09-07 1929-09-04 Method and apparatus for recording and reproducing sound

Country Status (1)

Country Link
FR (1) FR681303A (en)

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