FR2449364B1 - - Google Patents

Info

Publication number
FR2449364B1
FR2449364B1 FR8003270A FR8003270A FR2449364B1 FR 2449364 B1 FR2449364 B1 FR 2449364B1 FR 8003270 A FR8003270 A FR 8003270A FR 8003270 A FR8003270 A FR 8003270A FR 2449364 B1 FR2449364 B1 FR 2449364B1
Authority
FR
France
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
FR8003270A
Other languages
French (fr)
Other versions
FR2449364A1 (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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of FR2449364A1 publication Critical patent/FR2449364A1/fr
Application granted granted Critical
Publication of FR2449364B1 publication Critical patent/FR2449364B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/32—Automatic control in amplifiers having semiconductor devices the control being dependent upon ambient noise level or sound level
FR8003270A 1979-02-16 1980-02-14 Procede et agencement de commande d'une source de son utile Granted FR2449364A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792906072 DE2906072A1 (de) 1979-02-16 1979-02-16 Verfahren und einrichtung zur steuerung einer nutzschallquelle

Publications (2)

Publication Number Publication Date
FR2449364A1 FR2449364A1 (fr) 1980-09-12
FR2449364B1 true FR2449364B1 (zh) 1983-05-27

Family

ID=6063127

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8003270A Granted FR2449364A1 (fr) 1979-02-16 1980-02-14 Procede et agencement de commande d'une source de son utile

Country Status (5)

Country Link
JP (1) JPS55113097A (zh)
DE (1) DE2906072A1 (zh)
FR (1) FR2449364A1 (zh)
GB (1) GB2042295A (zh)
IT (1) IT1140556B (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257317A (en) * 1991-06-26 1993-01-06 Damian Rupert Lindley Automatic volume control for car stereo
EP1744450A1 (en) * 2005-07-14 2007-01-17 Harman Becker Automotive Systems GmbH Electronic device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB520915A (en) * 1938-11-04 1940-05-07 Kolster Brandes Ltd Improvements in or relating to sound reproducing apparatus such as radio receivers
JPS4940048A (zh) * 1972-08-16 1974-04-15
GB1518574A (en) * 1976-06-02 1978-07-19 Mueller U Sound reproducing system

Also Published As

Publication number Publication date
JPS55113097A (en) 1980-09-01
IT8019849A0 (it) 1980-02-12
IT1140556B (it) 1986-10-01
GB2042295A (en) 1980-09-17
FR2449364A1 (fr) 1980-09-12
DE2906072A1 (de) 1980-08-21

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Legal Events

Date Code Title Description
ST Notification of lapse