EP0054450B1 - Hörhilfsgeräte - Google Patents

Hörhilfsgeräte Download PDF

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Publication number
EP0054450B1
EP0054450B1 EP19810401782 EP81401782A EP0054450B1 EP 0054450 B1 EP0054450 B1 EP 0054450B1 EP 19810401782 EP19810401782 EP 19810401782 EP 81401782 A EP81401782 A EP 81401782A EP 0054450 B1 EP0054450 B1 EP 0054450B1
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EP
European Patent Office
Prior art keywords
bands
frequency
band
amplitude
image
Prior art date
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Expired
Application number
EP19810401782
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English (en)
French (fr)
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EP0054450A1 (de
Inventor
Jean-Claude Lafon
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Individual
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Individual
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    • 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
    • H04R25/35—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception 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 loss of severely disabled deaf or "deep deaf in them.” making said speech intelligible.
  • 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 2,000 and 3,000 Hz respectively strictly identical information, knowing in two identical fractions and superimposed with the same serious transposition sound.
  • the invention according to claim 1 aims, above all, to remedy the loss of information observed in these different known transposition formulas.
  • the hearing aid devices of the above type according to the invention include means for transposing the different slices of the overall acoustic signal received at each instant, contained respectively in the different useful bands, into as many image slices located in the spectrum audible by the deaf and respectively constituting 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 corresponding slice, but the frequency in 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 section given, the different image slices are staggered in the spectrum audible by the deaf, which corresponds to different reduction rates n for c
  • the sampling time adopted for the removal of the amplitude envelope from 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.
  • these signals are of two types, developed respectively from the sound information contained respectively in two useful bands C and D of the spectrum inaudible to the deaf.
  • 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 1 has an amplitude modulation similar to that of the slice Ci which it reproduces, but at each of the points m of this image, the amplitude is higher and the frequency f is equal to one third of the frequency F at 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.
  • the acoustic transposition carried out corresponds to a change of octave preserving the “tonal quality of the transposed acoustic information: the“ notes remain the same , but are changed octave.
  • this image c 1 As regards 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 sampling time of less than 1 , 2 ms: in other words, in the transposition performed, the vibrational quality is preserved, portions 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.
  • sampling time in question is given a value between 0.8 and 1.2 ms.
  • the image d 1 is formed from the signal slice D 1 by means of amplification of amplitude and a frequency division of the latter, but here by the factor 6.
  • the amplified sound message thus reconstituted proves to be very rich in information and particularly suited to the understanding of 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 that to clearly 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 C1 and d 1 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 of the slices C 1 and D i a certain number of successive and contiguous frequency sub-bands selected using appropriate filters, then transform the signal fractions contained in each of the sub -bands thus selected into an alternating electrical signal, after which the frequency of this signal is divided by the reduction rate n desired for the section considered by removing, in said alternating signal, n-1 alternations over n, and finally the reduced frequency signal thus obtained so as not only to compensate for the loss of energy due to the above suppression, but also to reach the zone audible by the deaf.
  • each fraction of a slice corresponding to one of the sub-bands defined above is transformed into a coded train of pulses whose number is linked to the frequency of said fraction, then a certain number of these are deleted.
  • pulses (know n-1 over n, if one wishes to ensure a division by the factor n) and finally one proceeds to an amplification as in the preceding case of a signal whose reduced frequency is related to the number of the remaining pulses.
  • FIG. 2 The embodiment shown diagrammatically in FIG. 2 is based on the same principles as the previous diagram shown 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 in that the reduced-frequency images reconstructed from the signal slices included in these three useful bands here occupy 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)

Claims (4)

1. Hörhilfsgerät, mit Einrichtungen zum Abnehmen akustischer Signalabschnitte (C,D,R,S, T), die in jeweils verschiedenen nützlichen Frequenzbändern vorliegen, die in dem für Schwerhörige nicht hörbaren Spektrum liegen und zum Umsetzen der Signalabschnitte in akustische Signale mit ausreichender Amplitude und mit einer Frequenz, die in dem für Schwerhörige hörbaren Spektrum liegt, dadurch gekennzeichnet, dass diese Einrichtungen so ausgebildet sind, dass sie den letztgenannten Signalabschnitten die Form von Abbildern (c,d,r,s,t) der zuerst erwähnten Abschnitte (C,D,R,S,T) geben, wobei es sich um getreue Abbilder mit verstärkter Amplitude handelt, deren Frequenz jedoch komprimiert und reduziert ist, wobei die Modulation der Amplitude jedes Abbildes ähnlich der des entsprechenden Abschnittes ist, aber die Frequenz in jedem Punkt des Abbildes einen Bruchteil 1/n der Frequenz in dem entsprechenden Punkt des Abschnittes beträgt und der Reduktionsgrad n eine Zahl, vorzugsweise eine ganze Zahl ist, die grösser als 1 and für alle Punkte eines gegebenen Abschnittes gleich ist, dass die verschiedenen Abschnitts-Abbilder (c,d,r,s,t) sich lückenlos in dem für den Schwerhörigen hörbaren Spektrum aneinanderreihen, so dass sich unterschiedliche Reduktionsgrade n für die verschiedenen Abbilder ergeben und dass die Probenahme- oder Abnahmezeit für die Abnahme der Hüllkurve der Amplitude jedes Abschnittes, der dazu dient, die Amplitude des entsprechenden Abbild-Abschnittes zu modulieren, zwischen 0,8 und 1,2 ms liegt.
2. Hörhilfsgerät nach Anspruch 1, dadurch gekennzeichnet, dass zwei nützliche Frequenzbänder benutzt werden, deren Frequenzen zwischen etwa 1 500 und 2400 Hz bzw. zwischen etwa 4800 und 6 000 Hz liegen und dass der Reduktionsgrad für die beiden Bänder 3 bzw. 6 beträgt.
3. Hörhilfsgerät nach Anspruch 1, dadurch gekennzeichnet, dass drei nützliche Frequenzbänder benutzt werden, deren Frequenzen zwischen etwa 1 200 und 2 000 Hz, zwischen etwa 3 000 und 4 500 Hz bzw. zwischen etwa 6 000 und 8 000 Hz liegen und dass der Reduktionsgrad für die drei Bänder 2, 3 bzw. 4 beträgt.
4. Hörhilfsgerät nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass es Einrichtungen zum Verstärken aller akustischen Anteile der normalerweise empfangenen Töne, deren Frequenz unterhalb etwa 500 Hz liegt, um einen relativ hohen Verstärkungsgrad und zum progressiven Reduzieren des Verstärkungsgrades bis auf 1 000 Hz und darüber enthält, wobei die Probenahme- oder Abnahmezeit für die verstärkten Abschnitte zwischen 0,8 und 1,2 ms liegt.
EP19810401782 1980-11-28 1981-11-10 Hörhilfsgeräte Expired EP0054450B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

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EP19810401782 Expired EP0054450B1 (de) 1980-11-28 1981-11-10 Hörhilfsgeräte

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4759052B2 (ja) * 2005-06-27 2011-08-31 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

Families Citing this family (15)

* 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
FR2598909B1 (fr) * 1986-05-23 1988-08-26 Franche Comte Universite Perfectionnements aux dispositifs de prothese auditive
US5014319A (en) * 1988-02-15 1991-05-07 Avr Communications Ltd. Frequency transposing hearing aid
US6133436A (en) * 1996-11-06 2000-10-17 Sequenom, Inc. Beads bound to a solid support and to nucleic acids
US6577739B1 (en) * 1997-09-19 2003-06-10 University Of Iowa Research Foundation Apparatus and methods for proportional audio compression and frequency shifting
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
EP1333700A3 (de) * 2003-03-06 2003-09-17 Phonak Ag Verfahren zur Frequenzunsetzung in einem Hörgerät und ein solches Hörgerät
AU2003904207A0 (en) * 2003-08-11 2003-08-21 Vast Audio Pty Ltd Enhancement of sound externalization and separation for hearing-impaired listeners: a spatial hearing-aid
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
US7813931B2 (en) 2005-04-20 2010-10-12 QNX Software Systems, Co. System for improving speech quality and intelligibility with bandwidth compression/expansion
EP2375782B1 (de) * 2010-04-09 2018-12-12 Oticon A/S Verbesserungen in der Geräuschwahrnehmung mittels Frequenztransposition durch Verschiebung des Tonumfangs
DE102010041644B4 (de) † 2010-09-29 2019-07-11 Sivantos Pte. Ltd. Verfahren zur Frequenzkompression mit harmonischer Korrektur und Vorrichtung
EP3128765A1 (de) * 2015-08-07 2017-02-08 Tain-Tzu Chang Verfahren zum verarbeiten eines sound tracks

Family Cites Families (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
FR2142807B1 (de) * 1971-06-25 1973-06-29 Anvar

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4759052B2 (ja) * 2005-06-27 2011-08-31 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

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Publication number Publication date
FR2494988B1 (fr) 1985-07-05
FR2494988A1 (fr) 1982-06-04
DE3164606D1 (en) 1984-08-09
EP0054450A1 (de) 1982-06-23

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