DE3685474D1 - Adaptive rauschunterdrueckungseinrichtung. - Google Patents

Adaptive rauschunterdrueckungseinrichtung.

Info

Publication number
DE3685474D1
DE3685474D1 DE8686113983T DE3685474T DE3685474D1 DE 3685474 D1 DE3685474 D1 DE 3685474D1 DE 8686113983 T DE8686113983 T DE 8686113983T DE 3685474 T DE3685474 T DE 3685474T DE 3685474 D1 DE3685474 D1 DE 3685474D1
Authority
DE
Germany
Prior art keywords
noise reduction
reduction device
adaptive noise
adaptive
reduction
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 - Lifetime
Application number
DE8686113983T
Other languages
English (en)
Inventor
Douglas Chabries
Gary R Kenworthy
Richard W Christiansen
Douglas Lynn
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of DE3685474D1 publication Critical patent/DE3685474D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters
    • H03H21/0025—Particular filtering methods
    • H03H21/0027—Particular filtering methods filtering in the frequency domain
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/43—Signal processing in hearing aids to enhance the speech intelligibility
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback

Landscapes

  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Human Computer Interaction (AREA)
  • Quality & Reliability (AREA)
  • Computational Linguistics (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Inorganic Insulating Materials (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Noise Elimination (AREA)
DE8686113983T 1985-10-10 1986-10-09 Adaptive rauschunterdrueckungseinrichtung. Expired - Lifetime DE3685474D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/785,999 US4658426A (en) 1985-10-10 1985-10-10 Adaptive noise suppressor

Publications (1)

Publication Number Publication Date
DE3685474D1 true DE3685474D1 (de) 1992-07-02

Family

ID=25137296

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686113983T Expired - Lifetime DE3685474D1 (de) 1985-10-10 1986-10-09 Adaptive rauschunterdrueckungseinrichtung.

Country Status (7)

Country Link
US (1) US4658426A (de)
EP (1) EP0220563B1 (de)
JP (1) JPS62155606A (de)
AU (1) AU582018B2 (de)
CA (1) CA1250348A (de)
DE (1) DE3685474D1 (de)
DK (1) DK485986A (de)

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Also Published As

Publication number Publication date
DK485986A (da) 1987-04-11
US4658426A (en) 1987-04-14
DK485986D0 (da) 1986-10-10
JPS62155606A (ja) 1987-07-10
AU6365386A (en) 1987-04-16
EP0220563A1 (de) 1987-05-06
AU582018B2 (en) 1989-03-09
CA1250348A (en) 1989-02-21
EP0220563B1 (de) 1992-05-27

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