FR840988A - Method and apparatus for preparing so-called <<silent>> sound recordings of the variable width type or of the variable intensity type - Google Patents

Method and apparatus for preparing so-called <<silent>> sound recordings of the variable width type or of the variable intensity type

Info

Publication number
FR840988A
FR840988A FR840988DA FR840988A FR 840988 A FR840988 A FR 840988A FR 840988D A FR840988D A FR 840988DA FR 840988 A FR840988 A FR 840988A
Authority
FR
France
Prior art keywords
type
variable
silent
preparing
called
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.)
ELECTRICAL FONO FILMS Co
Original Assignee
ELECTRICAL FONO FILMS Co
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 ELECTRICAL FONO FILMS Co filed Critical ELECTRICAL FONO FILMS Co
Application granted granted Critical
Publication of FR840988A publication Critical patent/FR840988A/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
FR840988D 1937-07-22 1938-07-21 Method and apparatus for preparing so-called <<silent>> sound recordings of the variable width type or of the variable intensity type Expired FR840988A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK840988X 1937-07-22

Publications (1)

Publication Number Publication Date
FR840988A true FR840988A (en) 1939-05-08

Family

ID=8153225

Family Applications (1)

Application Number Title Priority Date Filing Date
FR840988D Expired FR840988A (en) 1937-07-22 1938-07-21 Method and apparatus for preparing so-called <<silent>> sound recordings of the variable width type or of the variable intensity type

Country Status (1)

Country Link
FR (1) FR840988A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE761604C (en) * 1941-12-23 1952-10-27 Tobis Tonbild Syndikat G M B H Process for pure tone control for the production of sound recordings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE761604C (en) * 1941-12-23 1952-10-27 Tobis Tonbild Syndikat G M B H Process for pure tone control for the production of sound recordings

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