AT362834B - Anordnung zur unterdrueckung unerwuenschter signale - Google Patents

Anordnung zur unterdrueckung unerwuenschter signale

Info

Publication number
AT362834B
AT362834B AT0792177A AT792177A AT362834B AT 362834 B AT362834 B AT 362834B AT 0792177 A AT0792177 A AT 0792177A AT 792177 A AT792177 A AT 792177A AT 362834 B AT362834 B AT 362834B
Authority
AT
Austria
Prior art keywords
arrangement
unwanted signals
suppressing unwanted
suppressing
signals
Prior art date
Application number
AT0792177A
Other languages
English (en)
Other versions
ATA792177A (de
Original Assignee
Philips 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 Nv filed Critical Philips Nv
Publication of ATA792177A publication Critical patent/ATA792177A/de
Application granted granted Critical
Publication of AT362834B publication Critical patent/AT362834B/de

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • 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 without distortion of the input signal
    • 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
AT0792177A 1976-11-08 1977-11-07 Anordnung zur unterdrueckung unerwuenschter signale AT362834B (de)

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
ATA792177A ATA792177A (de) 1980-11-15
AT362834B true AT362834B (de) 1981-06-25

Family

ID=19827181

Family Applications (1)

Application Number Title Priority Date Filing Date
AT0792177A AT362834B (de) 1976-11-08 1977-11-07 Anordnung zur unterdrueckung unerwuenschter signale

Country Status (10)

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

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0065335B1 (de) * 1981-05-08 1984-12-27 Telecommunications Radioelectriques Et Telephoniques T.R.T. Einrichtung zur Vermeidung störender ungedämpfter Schwingungen in einem Schleifensystem und diese Einrichtung verwendender Fernsprechapparat mit Lautsprecher
FR2505587A1 (fr) * 1981-05-08 1982-11-12 Trt Telecom Radio Electr Dispositif destine a eviter des oscillations entretenues genantes dans un systeme boucle
FR2507848B1 (fr) * 1981-06-11 1987-09-25 Telephonie Ind Commerciale Procede de suppression d'oscillations entretenues par effet larsen et poste telephonique a circuit suppresseur appliquant ce procede
US4736432A (en) * 1985-12-09 1988-04-05 Motorola Inc. Electronic siren audio notch filter for transmitters
NL8600405A (nl) * 1986-02-18 1987-09-16 Philips Nv Versterker met automatische regeling van de versterking.
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
DE3865859D1 (de) * 1987-02-17 1991-12-05 Siemens Ag Schaltungsanordnung zum erkennen von schwingungen.
DE3865319D1 (de) * 1987-02-17 1991-11-14 Siemens Ag Schaltungsanordnung zum unterdruecken von schwingungen.
US5225836A (en) * 1988-03-23 1993-07-06 Central Institute For The Deaf Electronic filters, repeated signal charge conversion apparatus, hearing aids and methods
US5016280A (en) * 1988-03-23 1991-05-14 Central Institute For The Deaf Electronic filters, 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
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
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
DE4328798C2 (de) * 1993-08-27 1997-01-16 Blaupunkt Werke Gmbh Verfahren und Einrichtung zum Anpassen der Lautstärke eines mobilen Wiedergabegerätes an das Umgebungsgeräusch
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 (de) * 2015-12-22 2017-06-28 Oticon A/s Hörgerät mit einem rückkopplungsdetektor
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 (de) * 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

Also Published As

Publication number Publication date
IT1091946B (it) 1985-07-06
JPS6051810B2 (ja) 1985-11-15
FR2370376A1 (fr) 1978-06-02
DE2747821A1 (de) 1978-05-11
GB1545445A (en) 1979-05-10
JPS5358704A (en) 1978-05-26
NL7612358A (nl) 1978-05-10
DK491677A (da) 1978-05-09
FR2370376B1 (de) 1983-03-25
CA1107355A (en) 1981-08-18
US4747144A (en) 1988-05-24
DE2747821C2 (de) 1986-11-27
US4525856A (en) 1985-06-25
ATA792177A (de) 1980-11-15

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee