JPH0313762B2 - - Google Patents

Info

Publication number
JPH0313762B2
JPH0313762B2 JP56022420A JP2242081A JPH0313762B2 JP H0313762 B2 JPH0313762 B2 JP H0313762B2 JP 56022420 A JP56022420 A JP 56022420A JP 2242081 A JP2242081 A JP 2242081A JP H0313762 B2 JPH0313762 B2 JP H0313762B2
Authority
JP
Japan
Prior art keywords
volume
signal
amplification factor
amplification
circuit
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
JP56022420A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57136811A (en
Inventor
Fukashi Sugasawa
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP56022420A priority Critical patent/JPS57136811A/ja
Priority to US06/348,257 priority patent/US4479237A/en
Publication of JPS57136811A publication Critical patent/JPS57136811A/ja
Publication of JPH0313762B2 publication Critical patent/JPH0313762B2/ja
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

Landscapes

  • Control Of Amplification And Gain Control (AREA)
JP56022420A 1981-02-18 1981-02-18 Automatic controller of sound volume Granted JPS57136811A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56022420A JPS57136811A (en) 1981-02-18 1981-02-18 Automatic controller of sound volume
US06/348,257 US4479237A (en) 1981-02-18 1982-02-12 Automatic sound level control system for audio equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56022420A JPS57136811A (en) 1981-02-18 1981-02-18 Automatic controller of sound volume

Publications (2)

Publication Number Publication Date
JPS57136811A JPS57136811A (en) 1982-08-24
JPH0313762B2 true JPH0313762B2 (US07935154-20110503-C00006.png) 1991-02-25

Family

ID=12082177

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56022420A Granted JPS57136811A (en) 1981-02-18 1981-02-18 Automatic controller of sound volume

Country Status (2)

Country Link
US (1) US4479237A (US07935154-20110503-C00006.png)
JP (1) JPS57136811A (US07935154-20110503-C00006.png)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6095721U (ja) * 1983-12-07 1985-06-29 パイオニア株式会社 電子ボリユ−ム回路
GB2187581B (en) * 1985-04-10 1989-06-21 Matsushita Electric Ind Co Ltd Control circuit
JPH0170417U (US07935154-20110503-C00006.png) * 1987-10-29 1989-05-10
JP3306600B2 (ja) * 1992-08-05 2002-07-24 三菱電機株式会社 自動音量調整装置
BE1007188A3 (fr) * 1993-06-30 1995-04-18 Staar Sa Procede automatique de reglage du volume de reproduction sonore.
DE4328798C2 (de) * 1993-08-27 1997-01-16 Blaupunkt Werke Gmbh Verfahren und Einrichtung zum Anpassen der Lautstärke eines mobilen Wiedergabegerätes an das Umgebungsgeräusch
DE4407032A1 (de) * 1994-03-03 1995-09-07 Sel Alcatel Ag Vorrichtung zur Sprachsignalverarbeitung
US5907622A (en) * 1995-09-21 1999-05-25 Dougherty; A. Michael Automatic noise compensation system for audio reproduction equipment
US5872852A (en) * 1995-09-21 1999-02-16 Dougherty; A. Michael Noise estimating system for use with audio reproduction equipment
GB0023207D0 (en) * 2000-09-21 2000-11-01 Royal College Of Art Apparatus for acoustically improving an environment
US20040125962A1 (en) * 2000-04-14 2004-07-01 Markus Christoph Method and apparatus for dynamic sound optimization
DE10018666A1 (de) 2000-04-14 2001-10-18 Harman Audio Electronic Sys Vorrichtung und Verfahren zum geräuschabhängigen Anpassen eines akustischen Nutzsignals
DE10107385A1 (de) * 2001-02-16 2002-09-05 Harman Audio Electronic Sys Vorrichtung zum geräuschabhängigen Einstellen der Lautstärken
KR20030059624A (ko) * 2002-01-03 2003-07-10 삼성전자주식회사 휴대용컴퓨터의 볼륨제어시스템 및 볼륨제어방법
US20040258254A1 (en) * 2003-06-17 2004-12-23 Mollon Eric L. Automotive audio system adapted to roadway conditions
US7333618B2 (en) * 2003-09-24 2008-02-19 Harman International Industries, Incorporated Ambient noise sound level compensation
US7606376B2 (en) 2003-11-07 2009-10-20 Harman International Industries, Incorporated Automotive audio controller with vibration sensor
DE602004004242T2 (de) * 2004-03-19 2008-06-05 Harman Becker Automotive Systems Gmbh System und Verfahren zur Verbesserung eines Audiosignals
EP1619793B1 (en) * 2004-07-20 2015-06-17 Harman Becker Automotive Systems GmbH Audio enhancement system and method
US7715574B2 (en) * 2004-08-04 2010-05-11 James E. Aikins Audio apparatus for vessel
TW200620817A (en) * 2004-12-10 2006-06-16 Quanta Comp Inc Audio output method and device for portable communication apparatus
US8170221B2 (en) * 2005-03-21 2012-05-01 Harman Becker Automotive Systems Gmbh Audio enhancement system and method
EP1720249B1 (en) 2005-05-04 2009-07-15 Harman Becker Automotive Systems GmbH Audio enhancement system and method
US7760893B1 (en) 2006-07-26 2010-07-20 Starmark, Inc. Automatic volume control to compensate for speech interference noise
US7908134B1 (en) 2006-07-26 2011-03-15 Starmark, Inc. Automatic volume control to compensate for speech interference noise
US9037276B2 (en) * 2011-04-06 2015-05-19 International Business Machines Corporation Dynamic setting of increments on an amplitude scale
US9025793B2 (en) * 2011-06-21 2015-05-05 Rohm Co., Ltd. Audio signal processing circuit
DE102020114762B4 (de) 2020-06-03 2023-11-16 Audi Aktiengesellschaft Verfahren und System zur Kompensation von Umgebungs- und Eigengeräuschen eines Kraftfahrzeugs
CN113655983B (zh) * 2021-07-27 2023-09-08 深圳市冠旭电子股份有限公司 音频播放方法、装置、音频播放设备及可读存储介质

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889059A (en) * 1973-03-26 1975-06-10 Northern Electric Co Loudspeaking communication terminal apparatus and method of operation
GB2029141A (en) * 1978-08-26 1980-03-12 Viva Co Gain control arrangements

Also Published As

Publication number Publication date
JPS57136811A (en) 1982-08-24
US4479237A (en) 1984-10-23

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