FR2370376A1 - Dispositif destine a amplifier des signaux acoustiques et muni de moyens pour supprimer des signaux parasites indesirables - Google Patents

Dispositif destine a amplifier des signaux acoustiques et muni de moyens pour supprimer des signaux parasites indesirables

Info

Publication number
FR2370376A1
FR2370376A1 FR7733527A FR7733527A FR2370376A1 FR 2370376 A1 FR2370376 A1 FR 2370376A1 FR 7733527 A FR7733527 A FR 7733527A FR 7733527 A FR7733527 A FR 7733527A FR 2370376 A1 FR2370376 A1 FR 2370376A1
Authority
FR
France
Prior art keywords
signals
detector
device intended
remove undesirable
amplify acoustic
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.)
Granted
Application number
FR7733527A
Other languages
English (en)
French (fr)
Other versions
FR2370376B1 (en:Method
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2370376A1 publication Critical patent/FR2370376A1/fr
Application granted granted Critical
Publication of FR2370376B1 publication Critical patent/FR2370376B1/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
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/45—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
    • H04R25/453—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback electronically

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Amplifiers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
FR7733527A 1976-11-08 1977-11-08 Dispositif destine a amplifier des signaux acoustiques et muni de moyens pour supprimer des signaux parasites indesirables Granted FR2370376A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7612358A NL7612358A (nl) 1976-11-08 1976-11-08 Versterkerinrichting voor akoestische signalen voorzien van middelen voor het onderdrukken van ongewenste stoorsignalen.

Publications (2)

Publication Number Publication Date
FR2370376A1 true FR2370376A1 (fr) 1978-06-02
FR2370376B1 FR2370376B1 (en:Method) 1983-03-25

Family

ID=19827181

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7733527A Granted FR2370376A1 (fr) 1976-11-08 1977-11-08 Dispositif destine a amplifier des signaux acoustiques et muni de moyens pour supprimer des signaux parasites indesirables

Country Status (10)

Country Link
US (2) US4525856A (en:Method)
JP (1) JPS6051810B2 (en:Method)
AT (1) AT362834B (en:Method)
CA (1) CA1107355A (en:Method)
DE (1) DE2747821C2 (en:Method)
DK (1) DK491677A (en:Method)
FR (1) FR2370376A1 (en:Method)
GB (1) GB1545445A (en:Method)
IT (1) IT1091946B (en:Method)
NL (1) NL7612358A (en:Method)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2505587A1 (fr) * 1981-05-08 1982-11-12 Trt Telecom Radio Electr Dispositif destine a eviter des oscillations entretenues genantes dans un systeme boucle
EP0065335A1 (fr) * 1981-05-08 1982-11-24 Telecommunications Radioelectriques Et Telephoniques T.R.T. Dispositif destiné à éviter des oscillations entretenues gênantes dans un système bouclé et poste téléphonique à haut-parleur utilisant ce dispositif
FR2507848A1 (fr) * 1981-06-11 1982-12-17 Telephonie Ind Commerciale Procede de suppression d'oscillations entretenues par effet larsen et poste telephonique a circuit suppresseur appliquant ce procede
EP0234651A1 (en) * 1986-02-18 1987-09-02 Koninklijke Philips Electronics N.V. Amplifier with automatic gain control
EP0280909A1 (de) * 1987-02-17 1988-09-07 Siemens Aktiengesellschaft Schaltungsanordnung zum Erkennen von Schwingungen
EP0641070A1 (de) * 1993-08-27 1995-03-01 Blaupunkt-Werke GmbH Verfahren und Einrichtung zum Anpassen der Lautstärke eines mobilen Wiedergabegerätes an das Umgebungsgeräusch

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4736432A (en) * 1985-12-09 1988-04-05 Motorola Inc. Electronic siren audio notch filter for transmitters
US4879749A (en) * 1986-06-26 1989-11-07 Audimax, Inc. Host controller for programmable digital hearing aid system
US4759065A (en) * 1986-09-22 1988-07-19 Harman International Industries, Incorporated Automotive sound system
US4815140A (en) * 1987-02-17 1989-03-21 Siemens Aktiengesellschaft Circuit arrangement for suppressing oscillations
US5016280A (en) * 1988-03-23 1991-05-14 Central Institute For The Deaf Electronic filters, hearing aids and methods
US5225836A (en) * 1988-03-23 1993-07-06 Central Institute For The Deaf Electronic filters, repeated signal charge conversion apparatus, hearing aids and methods
JPH02155398A (ja) * 1988-12-07 1990-06-14 Biiba Kk ハウリング防止装置
US5187741A (en) * 1990-11-30 1993-02-16 At&T Bell Laboratories Enhanced acoustic calibration procedure for a voice switched speakerphone
US5263019A (en) * 1991-01-04 1993-11-16 Picturetel Corporation Method and apparatus for estimating the level of acoustic feedback between a loudspeaker and microphone
US5305307A (en) * 1991-01-04 1994-04-19 Picturetel Corporation Adaptive acoustic echo canceller having means for reducing or eliminating echo in a plurality of signal bandwidths
US5412734A (en) * 1993-09-13 1995-05-02 Thomasson; Samuel L. Apparatus and method for reducing acoustic feedback
US5493620A (en) * 1993-12-20 1996-02-20 Pulfrey; Robert E. High fidelity sound reproducing system
US6252967B1 (en) * 1999-01-21 2001-06-26 Acoustic Technologies, Inc. Reducing acoustic feedback with digital modulation
DE10228826A1 (de) * 2002-06-27 2004-01-29 Siemens Audiologische Technik Gmbh Akustikmodul für ein Hörhilfsgerät
US7627129B2 (en) * 2002-11-21 2009-12-01 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Apparatus and method for suppressing feedback
US9236837B2 (en) 2011-08-25 2016-01-12 Infineon Technologies Ag System and method for low distortion capacitive signal source amplifier
US8638249B2 (en) 2012-04-16 2014-01-28 Infineon Technologies Ag System and method for high input capacitive signal amplifier
EP3185588A1 (en) * 2015-12-22 2017-06-28 Oticon A/s A hearing device comprising a feedback detector
US10530936B1 (en) 2019-03-15 2020-01-07 Motorola Solutions, Inc. Method and system for acoustic feedback cancellation using a known full band sequence

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3405237A (en) * 1965-06-01 1968-10-08 Bell Telephone Labor Inc Apparatus for determining the periodicity and aperiodicity of a complex wave
GB1228795A (en:Method) * 1967-05-31 1971-04-21
US3920931A (en) * 1974-09-25 1975-11-18 Jr Paul Yanick Hearing aid amplifiers employing selective gain control circuits
US4079199A (en) * 1977-05-25 1978-03-14 Patronis Jr Eugene T Acoustic feedback detector and automatic gain control

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2505587A1 (fr) * 1981-05-08 1982-11-12 Trt Telecom Radio Electr Dispositif destine a eviter des oscillations entretenues genantes dans un systeme boucle
EP0065335A1 (fr) * 1981-05-08 1982-11-24 Telecommunications Radioelectriques Et Telephoniques T.R.T. Dispositif destiné à éviter des oscillations entretenues gênantes dans un système bouclé et poste téléphonique à haut-parleur utilisant ce dispositif
FR2507848A1 (fr) * 1981-06-11 1982-12-17 Telephonie Ind Commerciale Procede de suppression d'oscillations entretenues par effet larsen et poste telephonique a circuit suppresseur appliquant ce procede
EP0234651A1 (en) * 1986-02-18 1987-09-02 Koninklijke Philips Electronics N.V. Amplifier with automatic gain control
EP0280909A1 (de) * 1987-02-17 1988-09-07 Siemens Aktiengesellschaft Schaltungsanordnung zum Erkennen von Schwingungen
EP0641070A1 (de) * 1993-08-27 1995-03-01 Blaupunkt-Werke GmbH Verfahren und Einrichtung zum Anpassen der Lautstärke eines mobilen Wiedergabegerätes an das Umgebungsgeräusch
US5550922A (en) * 1993-08-27 1996-08-27 Blaupunkt-Werke Gmbh Vehicle radio automatic volume adjustment system

Also Published As

Publication number Publication date
US4525856A (en) 1985-06-25
ATA792177A (de) 1980-11-15
JPS5358704A (en) 1978-05-26
US4747144A (en) 1988-05-24
CA1107355A (en) 1981-08-18
GB1545445A (en) 1979-05-10
JPS6051810B2 (ja) 1985-11-15
DE2747821A1 (de) 1978-05-11
DK491677A (da) 1978-05-09
NL7612358A (nl) 1978-05-10
FR2370376B1 (en:Method) 1983-03-25
AT362834B (de) 1981-06-25
DE2747821C2 (de) 1986-11-27
IT1091946B (it) 1985-07-06

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Legal Events

Date Code Title Description
ST Notification of lapse