EP0054450A1 - Hörhilfsgeräte - Google Patents

Hörhilfsgeräte Download PDF

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Publication number
EP0054450A1
EP0054450A1 EP19810401782 EP81401782A EP0054450A1 EP 0054450 A1 EP0054450 A1 EP 0054450A1 EP 19810401782 EP19810401782 EP 19810401782 EP 81401782 A EP81401782 A EP 81401782A EP 0054450 A1 EP0054450 A1 EP 0054450A1
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EP
European Patent Office
Prior art keywords
bands
frequency
approximately
amplitude
image
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
EP19810401782
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English (en)
French (fr)
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EP0054450B1 (de
Inventor
Jean-Claude Lafon
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Individual
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Individual
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Publication date
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Publication of EP0054450A1 publication Critical patent/EP0054450A1/de
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Publication of EP0054450B1 publication Critical patent/EP0054450B1/de
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/35—Electric hearing aids using translation techniques
    • H04R25/353—Frequency, e.g. frequency shift or compression

Definitions

  • the invention is intended for hearing aid devices, devices intended to remedy deafness by enabling deaf people to understand human speech, and it relates more particularly, but not exclusively, among these devices, those intended to remedy insufficiency hearing impairment of severely affected deaf or "deep deaf” deaf people by making speech intelligible to them.
  • the deep deaf perceive only the sounds whose amplitude is sufficiently high and whose frequency is relatively low and generally located in the range of frequencies between 20 and 1000 Hz, range which will be designated hereinafter by the expression "spectrum audible by the deaf”.
  • Prosthesis devices based on this principle give great satisfaction and allow to solve, to a certain extent, the problem of deep deafness.
  • the above formula amounts to transforming the acoustic components having frequencies 2000 and 3000 Hz respectively into strictly identical information. , to know in two identical fractions and superimposed of the same grave sound of transposition.
  • the main object of the present invention is to remedy this loss of information.
  • the hearing aid devices of the above type according to the invention are characterized in that they comprise means for transposing the different sections, of the overall acoustic signal received at each instant, contained respectively in the different useful bands, in as many slices of images situated in the spectrum audible by the deaf and constituting respectively faithful images amplified in amplitude, but compressed and reduced in frequency, of said slices, the amplitude modulation of each image being similar to that of the slice corresponding, but the frequency at each point of this image being equal to a fraction 1 / n of the frequency at the corresponding point of said section and the reduction rate n being a number greater than 1, preferably an integer, which is the same for all the points of a given slice and in that the time constant adopted for the sampling of the amplitude envelope, of each slice, intended to modulate the amplitude of the corresponding image slice is between 0.8 and 1.2 ms.
  • the invention includes, apart from these main provisions, certain other provisions which are preferably used at the same time and which will be more explicitly discussed below.
  • Figure 1 is a gra phique to explain an application of the invention to a hearing aid for the deaf.
  • FIG. 2 is a graph relating to a variant application of the invention concerning the treatment of less deep deafness than the previous one.
  • these signals are of two types, developed respectively from the information sound mations contained respectively in two useful bands C and D of the spectrum inaudible to the deaf.
  • band C these two bands are here those comprised respectively between 1500 and 2400 Hz (band C) and between 4800 and 6000 Hz (band D).
  • the first image slice c 1 corresponds to a faithful image of the slice CI but amplified in amplitude and "compressed in frequency" with a reduction rate of 3.
  • this image c l has an amplitude modulation similar to that of the slice C 1 that it reproduces, but at each of the points m of this image, the amplitude is higher and the frequency f is equal to a third. from frequency F to the corresponding point M of said section C 1 .
  • the image c 1 corresponds to the slice C 1 amplified in amplitude and divided by three in frequency.
  • this image c 1 As for the amplitude modulation of this image c 1 , it is carried out from the envelope of the amplitude of the signal slice C 1 and this envelope is taken with a time constant of less than 1 , 2 ms: in other words, the vibrational quality of the por tions of original acoustic signals, the periodicity of which is less than 1.2 ms, that is to say the laryngeal vibrations of these portions, which are characteristic of the height of the human voice.
  • time constant in question is given a value between 0.8 and 1.2 ms.
  • the constant time is similarly chosen for the various amplifications, for the same reason as above.
  • the image d 1 is formed from the signal slice D 1 by means of an amplification of amplitude and a frequency division of the latter, but here by the factor 6 .
  • the amplified sound message thus reconstructed is reveals to be very rich in information and particularly suitable for understanding human speech.
  • the graph of FIG. 1 - just like that of FIG. 2 - is only a diagram making it possible to explain the frequency divisions carried out according to the invention: the bands c and d are not hatched on this diagram only to distinguish them from other bands; it is also for the sake of distinction that they have been given a higher amplitude than that of the other bands.
  • the amplitudes of the image signals c 1 and d should not be counted from the x-axis, but from the amplitudes of the signals (not shown) which are directly received in the corresponding range. between 500 and 1000 Hz, the two amplitudes considered overlapping.
  • each fraction of a slice corresponding to one of the defined sub-bands is transformed above in a coded train of pulses the number of which is linked to the frequency of said fraction, then a certain number of these pulses are suppressed (namely n-1 over n, if one wishes to ensure a division by the factor n) and finally an amplification is carried out as in the previous case of a signal whose reduced frequency is linked to the number of remaining pulses.
  • FIG. 2 The embodiment shown schematically in FIG. 2 is based on the same principles as the previous schematized in FIG. 1.
  • This second embodiment differs from the previous one in that the number of useful bands of the spectrum inaudible to the deaf is here equal to 3 and no longer to 2 and in that the reduced-frequency images reconstructed from the signal slices included in these three useful bands occupy here the frequency band between 600 and 2000 Hz.
  • the three image bands r, s and t corresponding respectively to the three image slices follow one another in the frequency band between 600 Hz and 2000 Hz without overlapping.

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  • 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)
  • Stereophonic System (AREA)
EP19810401782 1980-11-28 1981-11-10 Hörhilfsgeräte Expired EP0054450B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8025323 1980-11-28
FR8025323A FR2494988B1 (fr) 1980-11-28 1980-11-28 Perfectionnements aux dispositifs de prothese auditive

Publications (2)

Publication Number Publication Date
EP0054450A1 true EP0054450A1 (de) 1982-06-23
EP0054450B1 EP0054450B1 (de) 1984-07-04

Family

ID=9248469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810401782 Expired EP0054450B1 (de) 1980-11-28 1981-11-10 Hörhilfsgeräte

Country Status (3)

Country Link
EP (1) EP0054450B1 (de)
DE (1) DE3164606D1 (de)
FR (1) FR2494988B1 (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4499339A (en) * 1982-11-24 1985-02-12 Baptist Medical Center Of Oklahoma, Inc. Amplitude modulation apparatus and method
US4617536A (en) * 1982-11-24 1986-10-14 Baptist Medical Center Of Oklahoma, Inc. Amplitude modulation apparatus and method
EP0246970A1 (de) * 1986-05-23 1987-11-25 Université de Franche-Comté Hörgerätanordnungen
US5014319A (en) * 1988-02-15 1991-05-07 Avr Communications Ltd. Frequency transposing hearing aid
WO1999014986A1 (en) * 1997-09-19 1999-03-25 University Of Iowa Research Foundation Hearing aid with proportional frequency compression and shifting of audio signals
EP1333700A3 (de) * 2003-03-06 2003-09-17 Phonak Ag Verfahren zur Frequenzunsetzung in einem Hörgerät und ein solches Hörgerät
WO2007000161A1 (en) * 2005-06-27 2007-01-04 Widex A/S Hearing aid with enhanced high frequency reproduction and method for processing an audio signal
EP1796082A1 (de) * 2005-12-09 2007-06-13 QNX Software Systems (Wavemakers), Inc. System zur Verbesserung der Sprachverständlichkeit durch Kompression hoher Frequenzen
US7248711B2 (en) 2003-03-06 2007-07-24 Phonak Ag Method for frequency transposition and use of the method in a hearing device and a communication device
EP1661434A4 (de) * 2003-08-11 2007-08-22 Vast Audio Pty Ltd Klangverbesserung für hörbehinderte zuhörer
USRE41005E1 (en) * 1996-11-06 2009-11-24 Sequenom, Inc. Beads bound to a solid support and to nucleic acids
US7813931B2 (en) 2005-04-20 2010-10-12 QNX Software Systems, Co. System for improving speech quality and intelligibility with bandwidth compression/expansion
EP2375782A1 (de) * 2010-04-09 2011-10-12 Oticon A/S Verbesserungen in der Geräuschwahrnehmung mittels Frequenztransposition durch Verschiebung des Tonumfangs
US8249861B2 (en) 2005-04-20 2012-08-21 Qnx Software Systems Limited High frequency compression integration
EP3128765A1 (de) * 2015-08-07 2017-02-08 Tain-Tzu Chang Verfahren zum verarbeiten eines sound tracks
EP2437521B2 (de) † 2010-09-29 2017-09-13 Sivantos Pte. Ltd. Verfahren zur Frequenzkompression mit harmonischer Korrektur und entsprechende Vorrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1762185A1 (de) * 1967-06-03 1970-04-16 Biondi Dr Ing Emanuele Verfahren und Vorrichtung zur Hoerbarmachung von natuerlichen Lauten fuer hochgradig Schwerhoerige
FR2142807A1 (de) * 1971-06-25 1973-02-02 Anvar

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1762185A1 (de) * 1967-06-03 1970-04-16 Biondi Dr Ing Emanuele Verfahren und Vorrichtung zur Hoerbarmachung von natuerlichen Lauten fuer hochgradig Schwerhoerige
FR2142807A1 (de) * 1971-06-25 1973-02-02 Anvar

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
AICA: Conference on Hybrid Computation; Seventh Internationale Analogue Computation Meetings, 27-31 Aout 1973 Prague (CS) A. BURON et al. "Speech Translation Analog Unit", pages 253 a 255 *page 253, ligne 1 a page 255, alinea 3; figure 1* *
Journal of the Audio Engineering Society, Volume 18, No. 1, Fevrier 1970, New York (US) I.B. THOMAS et al. "The Intelligibility of Speech Transposed Downward in Frequency by One Octave", pages 56 a 62 *page 57, colonne de droite, dernier alinea a page 58, colonne de droite, alinea 1; page 61, colonne de gauche, dernier alinea a colonne de droite, ligne 18; figures 1 a 4* *

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4617536A (en) * 1982-11-24 1986-10-14 Baptist Medical Center Of Oklahoma, Inc. Amplitude modulation apparatus and method
US4499339A (en) * 1982-11-24 1985-02-12 Baptist Medical Center Of Oklahoma, Inc. Amplitude modulation apparatus and method
EP0246970A1 (de) * 1986-05-23 1987-11-25 Université de Franche-Comté Hörgerätanordnungen
US4843623A (en) * 1986-05-23 1989-06-27 University De Franche-Comte Hearing aid devices in which high frequency signal portions are transposed in low frequency compenstion signal portions
US5014319A (en) * 1988-02-15 1991-05-07 Avr Communications Ltd. Frequency transposing hearing aid
EP0329383A3 (de) * 1988-02-15 1991-10-16 Avr Communications Ltd. Frequenztranspositionshörhilfe
USRE41005E1 (en) * 1996-11-06 2009-11-24 Sequenom, Inc. Beads bound to a solid support and to nucleic acids
WO1999014986A1 (en) * 1997-09-19 1999-03-25 University Of Iowa Research Foundation Hearing aid with proportional frequency compression and shifting of audio signals
EP1333700A3 (de) * 2003-03-06 2003-09-17 Phonak Ag Verfahren zur Frequenzunsetzung in einem Hörgerät und ein solches Hörgerät
US7248711B2 (en) 2003-03-06 2007-07-24 Phonak Ag Method for frequency transposition and use of the method in a hearing device and a communication device
EP1661434A4 (de) * 2003-08-11 2007-08-22 Vast Audio Pty Ltd Klangverbesserung für hörbehinderte zuhörer
US8086451B2 (en) 2005-04-20 2011-12-27 Qnx Software Systems Co. System for improving speech intelligibility through high frequency compression
US8249861B2 (en) 2005-04-20 2012-08-21 Qnx Software Systems Limited High frequency compression integration
US8219389B2 (en) 2005-04-20 2012-07-10 Qnx Software Systems Limited System for improving speech intelligibility through high frequency compression
US7813931B2 (en) 2005-04-20 2010-10-12 QNX Software Systems, Co. System for improving speech quality and intelligibility with bandwidth compression/expansion
US8031892B2 (en) 2005-06-27 2011-10-04 Widex A/S Hearing aid with enhanced high frequency reproduction and method for processing an audio signal
WO2007000161A1 (en) * 2005-06-27 2007-01-04 Widex A/S Hearing aid with enhanced high frequency reproduction and method for processing an audio signal
CN101208991B (zh) * 2005-06-27 2012-01-11 唯听助听器公司 具有加强的高频再现功能的助听器以及处理声频信号的方法
AU2005333866B2 (en) * 2005-06-27 2009-04-23 Widex A/S Hearing aid with enhanced high frequency reproduction and method for processing an audio signal
JP2008544660A (ja) * 2005-06-27 2008-12-04 ヴェーデクス・アクティーセルスカプ 高周波数再生が強化された補聴器および音声信号処理方法
EP1796082A1 (de) * 2005-12-09 2007-06-13 QNX Software Systems (Wavemakers), Inc. System zur Verbesserung der Sprachverständlichkeit durch Kompression hoher Frequenzen
EP2375782A1 (de) * 2010-04-09 2011-10-12 Oticon A/S Verbesserungen in der Geräuschwahrnehmung mittels Frequenztransposition durch Verschiebung des Tonumfangs
US8949113B2 (en) 2010-04-09 2015-02-03 Oticon A/S Sound perception using frequency transposition by moving the envelope
EP2437521B2 (de) † 2010-09-29 2017-09-13 Sivantos Pte. Ltd. Verfahren zur Frequenzkompression mit harmonischer Korrektur und entsprechende Vorrichtung
EP3128765A1 (de) * 2015-08-07 2017-02-08 Tain-Tzu Chang Verfahren zum verarbeiten eines sound tracks

Also Published As

Publication number Publication date
DE3164606D1 (en) 1984-08-09
EP0054450B1 (de) 1984-07-04
FR2494988A1 (fr) 1982-06-04
FR2494988B1 (fr) 1985-07-05

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