FR2558668B1 - Appareil pour l'integration d'une multiplicite de systemes a audiofrequences - Google Patents

Appareil pour l'integration d'une multiplicite de systemes a audiofrequences

Info

Publication number
FR2558668B1
FR2558668B1 FR8500688A FR8500688A FR2558668B1 FR 2558668 B1 FR2558668 B1 FR 2558668B1 FR 8500688 A FR8500688 A FR 8500688A FR 8500688 A FR8500688 A FR 8500688A FR 2558668 B1 FR2558668 B1 FR 2558668B1
Authority
FR
France
Prior art keywords
multiplicity
integrating
audio frequency
frequency systems
systems
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
FR8500688A
Other languages
English (en)
Other versions
FR2558668A1 (fr
Inventor
William L Meisenheimer
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.)
Water Jet Corp
Original Assignee
Water Jet Corp
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 Water Jet Corp filed Critical Water Jet Corp
Publication of FR2558668A1 publication Critical patent/FR2558668A1/fr
Application granted granted Critical
Publication of FR2558668B1 publication Critical patent/FR2558668B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • 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
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/348—Muting in response to a mechanical action or to power supply variations, e.g. during tuning; Click removal circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Amplifiers (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Stereo-Broadcasting Methods (AREA)
FR8500688A 1984-01-20 1985-01-18 Appareil pour l'integration d'une multiplicite de systemes a audiofrequences Expired FR2558668B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/572,701 US4560838A (en) 1984-01-20 1984-01-20 Apparatus for integrating a plurality of audio systems

Publications (2)

Publication Number Publication Date
FR2558668A1 FR2558668A1 (fr) 1985-07-26
FR2558668B1 true FR2558668B1 (fr) 1988-10-14

Family

ID=24288990

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8500688A Expired FR2558668B1 (fr) 1984-01-20 1985-01-18 Appareil pour l'integration d'une multiplicite de systemes a audiofrequences

Country Status (9)

Country Link
US (1) US4560838A (fr)
JP (1) JPS60203099A (fr)
AU (1) AU3778685A (fr)
BE (1) BE901529A (fr)
DE (1) DE3501472A1 (fr)
ES (1) ES8602329A1 (fr)
FR (1) FR2558668B1 (fr)
GB (1) GB2153610B (fr)
IT (1) IT1199931B (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4679240A (en) * 1985-04-15 1987-07-07 Richards Medical Company Touch sensitive hearing aid volume control circuit
US4979217A (en) * 1986-05-08 1990-12-18 Shipley Robert T Programmed audio controller
JPS6386907A (ja) * 1986-09-30 1988-04-18 Yamaha Corp 利得調整回路
US4953222A (en) * 1988-06-01 1990-08-28 Peavey Electronics Corporation Multiple channel gated amplifier system
DE4023244A1 (de) * 1990-07-21 1992-01-30 Fliesenhof Bookhorn Inh Ralf P Schaltvorrichtung an einrichtungen in feuchtraeumen, insbesondere bade- oder whirlpoolwannen usw.
US5524056A (en) * 1993-04-13 1996-06-04 Etymotic Research, Inc. Hearing aid having plural microphones and a microphone switching system
JP2928754B2 (ja) * 1995-02-22 1999-08-03 三星電子株式会社 電話機能付きコンピュータ接続装置
US6091812A (en) * 1996-11-12 2000-07-18 Siemens Information And Communication Networks, Inc. Apparatus and method for automatically switching a headset between a telephone and a second audio source
US20020131611A1 (en) * 2001-03-13 2002-09-19 Hoover Alan Anderson `Audio surround sound power management switching
US20070071251A1 (en) * 2005-09-21 2007-03-29 Macduff Ian Audio switch

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2332211C3 (de) * 1973-06-25 1978-12-14 Siemens Ag, 1000 Berlin Und 8000 Muenchen Gerät zum Auswerten von elektrischen Signalen
JPS54125013A (en) * 1978-03-23 1979-09-28 Nippon Gakki Seizo Kk Signal selecting circuit
US4217573A (en) * 1979-04-05 1980-08-12 Norris Elwood G Switching unit for selectively connecting together various combinations of audio subsystems
JPS5617506A (en) * 1979-07-23 1981-02-19 Sony Corp Digital type gain control device
US4306114A (en) * 1980-01-21 1981-12-15 Summa-Nova Corporation Automatic audio mixing selector device

Also Published As

Publication number Publication date
IT8547547A1 (it) 1987-05-13
US4560838A (en) 1985-12-24
AU3778685A (en) 1985-08-01
GB8500897D0 (en) 1985-02-20
FR2558668A1 (fr) 1985-07-26
GB2153610B (en) 1987-09-23
IT1199931B (it) 1989-01-05
ES539691A0 (es) 1985-11-16
ES8602329A1 (es) 1985-11-16
BE901529A (fr) 1985-05-17
JPS60203099A (ja) 1985-10-14
IT8547547A0 (it) 1985-01-16
GB2153610A (en) 1985-08-21
DE3501472A1 (de) 1985-08-01

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Legal Events

Date Code Title Description
ST Notification of lapse