FR820968A - Method and apparatus for recording sound - Google Patents

Method and apparatus for recording sound

Info

Publication number
FR820968A
FR820968A FR820968DA FR820968A FR 820968 A FR820968 A FR 820968A FR 820968D A FR820968D A FR 820968DA FR 820968 A FR820968 A FR 820968A
Authority
FR
France
Prior art keywords
recording sound
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)
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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 RCA Corp, Radio Corporation of America filed Critical RCA Corp
Application granted granted Critical
Publication of FR820968A publication Critical patent/FR820968A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/04—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having discharge tubes
    • H03G9/10—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having discharge tubes for tone control and volume expansion or compression
FR820968D 1936-04-30 1937-04-23 Method and apparatus for recording sound Expired FR820968A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US820968XA 1936-04-30 1936-04-30

Publications (1)

Publication Number Publication Date
FR820968A true FR820968A (en) 1937-11-24

Family

ID=22169040

Family Applications (1)

Application Number Title Priority Date Filing Date
FR820968D Expired FR820968A (en) 1936-04-30 1937-04-23 Method and apparatus for recording sound

Country Status (1)

Country Link
FR (1) FR820968A (en)

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