FR2397750A1 - Procede et dispositif pour la commande et la regulation d'une source de sons utiles - Google Patents
Procede et dispositif pour la commande et la regulation d'une source de sons utilesInfo
- Publication number
- FR2397750A1 FR2397750A1 FR7821019A FR7821019A FR2397750A1 FR 2397750 A1 FR2397750 A1 FR 2397750A1 FR 7821019 A FR7821019 A FR 7821019A FR 7821019 A FR7821019 A FR 7821019A FR 2397750 A1 FR2397750 A1 FR 2397750A1
- Authority
- FR
- France
- Prior art keywords
- sounds
- useful
- source
- parasitic noise
- amplifier
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title abstract 2
- 230000003071 parasitic effect Effects 0.000 abstract 3
- 238000005259 measurement Methods 0.000 abstract 2
- 230000003321 amplification Effects 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
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
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2731971A DE2731971B2 (de) | 1977-07-15 | 1977-07-15 | Verfahren und Einrichtung zur Steuerung bzw. Regelung einer Nutzschallquelle |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2397750A1 true FR2397750A1 (fr) | 1979-02-09 |
Family
ID=6013982
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7821019A Withdrawn FR2397750A1 (fr) | 1977-07-15 | 1978-07-13 | Procede et dispositif pour la commande et la regulation d'une source de sons utiles |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS5430817A (de) |
DE (1) | DE2731971B2 (de) |
FR (1) | FR2397750A1 (de) |
GB (1) | GB2001220A (de) |
IT (1) | IT1097222B (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55147015A (en) * | 1979-05-07 | 1980-11-15 | Hitachi Ltd | Audio unit mounting on car |
DE2931604C2 (de) * | 1979-08-03 | 1982-04-29 | Siemens AG, 1000 Berlin und 8000 München | Störgeräuschkompensierte Mikrofonschaltung |
EP0156826B1 (de) * | 1983-09-14 | 1988-11-09 | Peiker, Andreas | Einrichtung zur sprachübertragung |
US4582414A (en) * | 1984-05-01 | 1986-04-15 | Eastman Kodak Company | Magnetic brush development apparatus |
WO1986000133A1 (en) * | 1984-06-08 | 1986-01-03 | Plessey Australia Pty. Limited | Adaptive speech detector system |
NL8403200A (nl) * | 1984-10-22 | 1986-05-16 | Philips Nv | Lawaaiafhankelijke- en spraakonafhankelijke volumeregeling. |
JPH04113399A (ja) * | 1990-09-03 | 1992-04-14 | Nec Ic Microcomput Syst Ltd | 音声増幅装置 |
GB2257317A (en) * | 1991-06-26 | 1993-01-06 | Damian Rupert Lindley | Automatic volume control for car stereo |
FR2765610B1 (fr) * | 1997-07-04 | 2003-08-15 | Kiekert Ag | Vehicule automobile avec un systeme de fermeture a ouvrir ou a verrouiller au moyen d'une telecommande |
US11295718B2 (en) * | 2018-11-02 | 2022-04-05 | Bose Corporation | Ambient volume control in open audio device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH244200A (de) * | 1945-08-23 | 1946-08-31 | Siemens Ag Albis | Elektroakustische Übertragungsanlage für lärmgestörte Wiedergabeorte. |
US2501327A (en) * | 1946-12-06 | 1950-03-21 | Rca Corp | Noise operated automatic volume control |
GB667694A (en) * | 1949-07-28 | 1952-03-05 | Gen Electric Co Ltd | Improvements in or relating to electrical sound reproducing apparatus |
US3410958A (en) * | 1965-03-25 | 1968-11-12 | Executone Inf Sys Inc | Noise controlled sound reproducing system |
DE2646232A1 (de) * | 1975-10-28 | 1977-05-05 | Orlik Henri | Schallwiedergabevorrichtung |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4984313A (de) * | 1972-12-18 | 1974-08-13 | ||
JPS5093761A (de) * | 1973-12-20 | 1975-07-26 | ||
JPS5267545A (en) * | 1975-12-03 | 1977-06-04 | Nippon Telegr & Teleph Corp <Ntt> | Automatic volume adjusting circuit |
-
1977
- 1977-07-15 DE DE2731971A patent/DE2731971B2/de not_active Withdrawn
-
1978
- 1978-07-12 GB GB7829651A patent/GB2001220A/en not_active Withdrawn
- 1978-07-13 IT IT25641/78A patent/IT1097222B/it active
- 1978-07-13 FR FR7821019A patent/FR2397750A1/fr not_active Withdrawn
- 1978-07-14 JP JP8526378A patent/JPS5430817A/ja active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH244200A (de) * | 1945-08-23 | 1946-08-31 | Siemens Ag Albis | Elektroakustische Übertragungsanlage für lärmgestörte Wiedergabeorte. |
US2501327A (en) * | 1946-12-06 | 1950-03-21 | Rca Corp | Noise operated automatic volume control |
GB667694A (en) * | 1949-07-28 | 1952-03-05 | Gen Electric Co Ltd | Improvements in or relating to electrical sound reproducing apparatus |
US3410958A (en) * | 1965-03-25 | 1968-11-12 | Executone Inf Sys Inc | Noise controlled sound reproducing system |
DE2646232A1 (de) * | 1975-10-28 | 1977-05-05 | Orlik Henri | Schallwiedergabevorrichtung |
Also Published As
Publication number | Publication date |
---|---|
IT1097222B (it) | 1985-08-26 |
GB2001220A (en) | 1979-01-24 |
IT7825641A0 (it) | 1978-07-13 |
JPS5430817A (en) | 1979-03-07 |
DE2731971A1 (de) | 1979-01-18 |
DE2731971B2 (de) | 1980-05-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |