JPS6051810B2 - スプリアス信号抑制用回路 - Google Patents

スプリアス信号抑制用回路

Info

Publication number
JPS6051810B2
JPS6051810B2 JP52132986A JP13298677A JPS6051810B2 JP S6051810 B2 JPS6051810 B2 JP S6051810B2 JP 52132986 A JP52132986 A JP 52132986A JP 13298677 A JP13298677 A JP 13298677A JP S6051810 B2 JPS6051810 B2 JP S6051810B2
Authority
JP
Japan
Prior art keywords
signal
circuit
counter
detector
periodicity
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
JP52132986A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5358704A (en
Inventor
ダニエル・ヨハネス・ハインデリカス・アドミラ−ル
ベンジヤミン・ロ−プス・カルドゾ
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
Koninklijke Philips Electronics 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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of JPS5358704A publication Critical patent/JPS5358704A/ja
Publication of JPS6051810B2 publication Critical patent/JPS6051810B2/ja
Expired 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)
JP52132986A 1976-11-08 1977-11-05 スプリアス信号抑制用回路 Expired JPS6051810B2 (ja)

Applications Claiming Priority (2)

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.
NL7612358 1976-11-08

Publications (2)

Publication Number Publication Date
JPS5358704A JPS5358704A (en) 1978-05-26
JPS6051810B2 true JPS6051810B2 (ja) 1985-11-15

Family

ID=19827181

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52132986A Expired JPS6051810B2 (ja) 1976-11-08 1977-11-05 スプリアス信号抑制用回路

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)

Families Citing this family (25)

* 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
DE3261682D1 (en) * 1981-05-08 1985-02-07 Trt Telecom Radio Electr Device for avoiding sustained disturbing oscillations in a closed-loop system and loud-speaking telephone apparatus utilising this device
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
US4815140A (en) * 1987-02-17 1989-03-21 Siemens Aktiengesellschaft Circuit arrangement for suppressing oscillations
EP0280909B1 (de) * 1987-02-17 1991-10-30 Siemens Aktiengesellschaft Schaltungsanordnung zum Erkennen von Schwingungen
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
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 (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

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
DE2747821A1 (de) 1978-05-11
DK491677A (da) 1978-05-09
NL7612358A (nl) 1978-05-10
FR2370376A1 (fr) 1978-06-02
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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