EP0124798A1 - Resonant peak control - Google Patents

Resonant peak control Download PDF

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Publication number
EP0124798A1
EP0124798A1 EP84104123A EP84104123A EP0124798A1 EP 0124798 A1 EP0124798 A1 EP 0124798A1 EP 84104123 A EP84104123 A EP 84104123A EP 84104123 A EP84104123 A EP 84104123A EP 0124798 A1 EP0124798 A1 EP 0124798A1
Authority
EP
European Patent Office
Prior art keywords
hearing aid
resonant peak
peak control
feedback
frequency response
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.)
Withdrawn
Application number
EP84104123A
Other languages
German (de)
English (en)
French (fr)
Inventor
Knud Ammitzboll
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens 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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0124798A1 publication Critical patent/EP0124798A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/502—Customised settings for obtaining desired overall acoustical characteristics using analog signal processing
    • 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
    • H04R25/70—Adaptation of deaf aid to hearing loss, e.g. initial electronic fitting

Definitions

  • This invention relates to a hearing aid in which acoustic feedback is controlled.
  • a high frequency cutoff circuit can be used to eliminate feedback, but it also entirely eliminates the high frequency response of the hearing aid.
  • Accurate ear impressions coupled with precise duplication at the laboratory can provide a precise fit for the hearing aid which is helpful in reducing feedback.
  • the hearing aid must be returned to the laboratory for minor corrections due to inaccuracies in the original impressions or in the duplications.
  • the invention features, in one aspect, a hearing aid having receiving means for receiving sound, amplifying means, connected to the receiving means, for amplifying sound, and a resonant peak control connected oetween the receiving and amplifying means, for reducing feedback by varying the amplifying means frequency response.
  • the resonant peak control of the hearing aid allows the frequency response to be tailored to reduce feedback without substantial reduction in high frequency amplification by the amplifying means;
  • the resonant peak control is an R-C circuit;
  • the R-C circuit is a series R-C circuit having a variable resistor and a capacitor.
  • the hearing aid has an adjustable vent which can be used to reduce feedback; the adjustable vent and the resonant peak control are coordinated to reduce feedback.
  • the invention features a method of reducing feedback in a hearing aid, having the steps of adjusting the volume of the hearing aid to the most comfortable level and tailoring the frequency response of the hearing aid output to reduce feedback.
  • the tailoring of the frequency response is accomplished by tuning a series R-C circuit in parallel with a hearing aid output.
  • This invention is a very significant step in the elimination of acoustic feedback in hearing aids because it allows the hearing aid to be adjusted for the elimination of feedback at the time of fitting.
  • Adjustment of the resonant peak control flattens out the frequency response ano shifts the frequency response curve to a lower frequency range, resulting in almost no loss in high frequency amplification and only a minimal change in saturation levels.
  • this hearing aid provides the advantage of being adjustable at the time of fitting without any significant sacrifice in operational characteristics.
  • Hearing aid 10 designed to be mounted in the user's ear, has microphone 12 for picking up external sounds, integrated circuit 14, typically an LTI 505 integrated circuit, for amplifying external souna, and receiver 16, typically a Knowles Electronics 1913 receiver for imparting the amplified sound to the user.
  • integrated circuit 14 typically an LTI 505 integrated circuit
  • receiver 16 typically a Knowles Electronics 1913 receiver for imparting the amplified sound to the user.
  • Micropnone 12 is connected to integrated circuit 14 by gain control 18, wnicn can be a potentiometer in series with capacitor 20, for adjusting the gain of the microphone.
  • Volume control 22 which can also be a potentiometer, allows variable aajustment of the amplified audio output of integrated circuit 14.
  • Receiver 16 connected in parallel with integrated circuit 14, is also connected in parallel with a series R-C circuit which includes capacitor 24 and resonant peak control (RPC) 26.
  • RPC resonant peak control
  • the resonant peak control is a variable potentiometer which when adjusted acts in conjunction with capacitor 24 and the inductance of receiver 16 to tailor the frequency response of the amplifier (integrated circuit 14) to reduce instability due to feedback.
  • frequency response curves A and B show the two extreme conditions between which the frequency response can be tailored by adjusting the resonant peak control.
  • the aojustment of the resonant peak control varies its electrical output which tunes or tailors the frequency response resulting in shifting and flattening of the peaks of the frequency response curve which reduces feedback with only a slight reduction in high frequency amplification and only a minimal change in the saturation curve.
  • curves C and D show the limits of the change in the saturation curve due to adjustment of the resonant peak control.
  • anc volume control 22 is adjusted to the most comfortable level for the particular user.
  • resonant peak control 26 is adjusted until feedback is eliminated. Then, if required volume control 22 can be further increaseo to again reach the most comfortable level.
  • Siemens Custom In-The-Ear Hearing Aid 007 sold by Siemens Hearing Instruments, Inc., 685 Liberty Avenue, Union, New Jersey, incorporates the inventive concept described in this application.
  • the size of the hearing aid vent opening can be changed to effect a change in amplifier instability (integrated circuit 14) due to feedback.
  • This modification of the opening is especially useful when a maximum resonant peak control adjustment is reached and feedback still occurs.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Circuit For Audible Band Transducer (AREA)
EP84104123A 1983-04-28 1984-04-12 Resonant peak control Withdrawn EP0124798A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/489,653 US4689818A (en) 1983-04-28 1983-04-28 Resonant peak control
US489653 1983-04-28

Publications (1)

Publication Number Publication Date
EP0124798A1 true EP0124798A1 (en) 1984-11-14

Family

ID=23944721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84104123A Withdrawn EP0124798A1 (en) 1983-04-28 1984-04-12 Resonant peak control

Country Status (3)

Country Link
US (1) US4689818A (enrdf_load_stackoverflow)
EP (1) EP0124798A1 (enrdf_load_stackoverflow)
JP (1) JPS59174800U (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6404488B1 (en) 1999-09-06 2002-06-11 University Of Liege Photometer
EP1398993A3 (de) * 2002-09-13 2009-03-25 Siemens Audiologische Technik GmbH Vorrichtung und Verfahren zur Rückkopplungskompensation in einem akustischen Verstärkungssystem, insbesondere in einem Hörnhilfsgerät
EP2056624A1 (en) 2008-04-10 2009-05-06 Oticon A/S Method of controlling a hearing device and hearing device
WO2012153296A3 (en) * 2011-05-12 2013-01-31 Cochlear Limited Identifying hearing prosthesis actuator resonance peak(s)
US11245991B2 (en) 2013-03-15 2022-02-08 Cochlear Limited Determining impedance-related phenomena in vibrating actuator and identifying device system characteristics based thereon

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JPH0683305B2 (ja) * 1987-03-12 1994-10-19 日本電気株式会社 拡声電話機
DE3734946A1 (de) * 1987-10-15 1989-05-03 Siemens Ag Hoergeraet mit moeglichkeit zum telefonieren
US4864611A (en) * 1987-11-24 1989-09-05 Helmuth Keld T Telephone handset attachment for use in-the-ear hearing aids
US5014319A (en) * 1988-02-15 1991-05-07 Avr Communications Ltd. Frequency transposing hearing aid
US5091952A (en) * 1988-11-10 1992-02-25 Wisconsin Alumni Research Foundation Feedback suppression in digital signal processing hearing aids
US5745587A (en) * 1995-06-07 1998-04-28 Bausch & Lomb Incorporated Hearing aid amplifier circuitry
US6072884A (en) * 1997-11-18 2000-06-06 Audiologic Hearing Systems Lp Feedback cancellation apparatus and methods
US6434246B1 (en) 1995-10-10 2002-08-13 Gn Resound As Apparatus and methods for combining audio compression and feedback cancellation in a hearing aid
US6219427B1 (en) 1997-11-18 2001-04-17 Gn Resound As Feedback cancellation improvements
US6498858B2 (en) * 1997-11-18 2002-12-24 Gn Resound A/S Feedback cancellation improvements
US6831986B2 (en) 2000-12-21 2004-12-14 Gn Resound A/S Feedback cancellation in a hearing aid with reduced sensitivity to low-frequency tonal inputs
US6937738B2 (en) * 2001-04-12 2005-08-30 Gennum Corporation Digital hearing aid system
US6633202B2 (en) 2001-04-12 2003-10-14 Gennum Corporation Precision low jitter oscillator circuit
DE60209161T2 (de) * 2001-04-18 2006-10-05 Gennum Corp., Burlington Mehrkanal Hörgerät mit Übertragungsmöglichkeiten zwischen den Kanälen
CA2382358C (en) * 2001-04-18 2007-01-09 Gennum Corporation Digital quasi-rms detector
US20020191800A1 (en) * 2001-04-19 2002-12-19 Armstrong Stephen W. In-situ transducer modeling in a digital hearing instrument
US7277554B2 (en) * 2001-08-08 2007-10-02 Gn Resound North America Corporation Dynamic range compression using digital frequency warping
ATE526792T1 (de) * 2001-08-15 2011-10-15 Sound Design Technologies Ltd Rekonfigurierbare hörhilfevorrichtung mit niedrigem leistungsverbrauch
US7657049B2 (en) * 2003-06-11 2010-02-02 Able Planet, Incorporated Telephone handset
US7978867B2 (en) * 2003-06-11 2011-07-12 Able Planet, Incorporated Audio signal system
US20070106530A1 (en) * 2004-05-26 2007-05-10 Blamey Peter J Oscillation suppression
WO2008098258A2 (en) * 2007-02-09 2008-08-14 Able Planet, Incorporated Method and apparatus for modifying an audio signal
EP2284833A1 (en) * 2009-08-03 2011-02-16 Bernafon AG A method for monitoring the influence of ambient noise on an adaptive filter for acoustic feedback cancellation
US9084048B1 (en) * 2010-06-17 2015-07-14 Shindig, Inc. Audio systems and methods employing an array of transducers optimized for particular sound frequencies
EP3917167A3 (en) 2013-06-14 2022-03-09 Oticon A/s A hearing assistance device with brain computer interface
US9414165B2 (en) * 2014-01-27 2016-08-09 Invensense, Inc. Acoustic sensor resonant peak reduction

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368644A (en) * 1966-03-28 1968-02-13 John D. Henderson Hearing aid tone tuning device and method
CH474200A (de) * 1969-01-17 1969-06-15 Elektro Akustik Ag F Kopf-Hörgerät

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US2390794A (en) * 1944-02-21 1945-12-11 Zenith Radio Corp Frequency response control
US2393184A (en) * 1944-10-14 1946-01-15 Zenith Radio Corp Tone control
DE1252747B (enrdf_load_stackoverflow) * 1965-08-18 1967-10-26
US3317671A (en) * 1965-09-07 1967-05-02 Nat Semiconductor Corp Electrical amplifier with input circuit direct-current-limiting means
US3571514A (en) * 1969-01-07 1971-03-16 Zenith Radio Corp Hearing aid tone control
DE2013365B2 (de) * 1970-03-20 1972-08-03 Robert Bosch Elektronik Gmbh, 1000 Berlin Und 7000 Stuttgart Mehrstufiger transistorverstaerker fuer schwerhoerigengeraete
US3849602A (en) * 1971-12-23 1974-11-19 G Gendin Earphone with frequency correction
US3995114A (en) * 1974-05-09 1976-11-30 Dahlberg Electronics, Inc. Ultra low current amplifier
US4046960A (en) * 1975-12-31 1977-09-06 Veale John R Audio fidelity frequency equalizer system
US4211898A (en) * 1977-07-11 1980-07-08 Matsushita Electric Industrial Co., Ltd. Headphone with two resonant peaks for simulating loudspeaker reproduction
DE2807452A1 (de) * 1978-02-22 1979-08-23 Uwe Zink Rueckkopplungsausschalter
GB1597501A (en) * 1978-05-12 1981-09-09 Nat Res Dev Acoustic feedback suppression
JPS5538733A (en) * 1978-09-08 1980-03-18 Matsushita Electric Ind Co Ltd Bone conduction hearing aid
JPS55124999U (enrdf_load_stackoverflow) * 1979-02-27 1980-09-04
JPS5769000A (en) * 1980-10-15 1982-04-27 Shigeru Egashira Frequency division hearing aid
DE3047691A1 (de) * 1980-12-18 1982-07-08 Robert Bosch Gmbh, 7000 Stuttgart "aktive tonblende fuer einen zwei- oder mehrstufigen transistor-hoergeraeteverstaerker"
US4426622A (en) * 1981-08-25 1984-01-17 The United States Of America As Represented By The Secretary Of The Army Frequency discriminator
US4538298A (en) * 1982-09-29 1985-08-27 Bose Corporation Fixed bandpass tone controlling
US4543453A (en) * 1983-03-30 1985-09-24 Beltone Electronics Corporation Electronic hearing aid control circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368644A (en) * 1966-03-28 1968-02-13 John D. Henderson Hearing aid tone tuning device and method
CH474200A (de) * 1969-01-17 1969-06-15 Elektro Akustik Ag F Kopf-Hörgerät

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6404488B1 (en) 1999-09-06 2002-06-11 University Of Liege Photometer
EP1398993A3 (de) * 2002-09-13 2009-03-25 Siemens Audiologische Technik GmbH Vorrichtung und Verfahren zur Rückkopplungskompensation in einem akustischen Verstärkungssystem, insbesondere in einem Hörnhilfsgerät
EP2056624A1 (en) 2008-04-10 2009-05-06 Oticon A/S Method of controlling a hearing device and hearing device
WO2012153296A3 (en) * 2011-05-12 2013-01-31 Cochlear Limited Identifying hearing prosthesis actuator resonance peak(s)
US9729981B2 (en) 2011-05-12 2017-08-08 Cochlear Limited Identifying hearing prosthesis actuator resonance peak(s)
US11245991B2 (en) 2013-03-15 2022-02-08 Cochlear Limited Determining impedance-related phenomena in vibrating actuator and identifying device system characteristics based thereon

Also Published As

Publication number Publication date
JPS59174800U (ja) 1984-11-21
JPH0445360Y2 (enrdf_load_stackoverflow) 1992-10-26
US4689818A (en) 1987-08-25

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH DE FR GB IT LI NL

17P Request for examination filed

Effective date: 19841221

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19860130

RIN1 Information on inventor provided before grant (corrected)

Inventor name: AMMITZBOLL, KNUD