EP1333700A2 - Procédé de transposition de fréquence dans une prothèse auditive et une telle prothèse auditive - Google Patents

Procédé de transposition de fréquence dans une prothèse auditive et une telle prothèse auditive Download PDF

Info

Publication number
EP1333700A2
EP1333700A2 EP03005047A EP03005047A EP1333700A2 EP 1333700 A2 EP1333700 A2 EP 1333700A2 EP 03005047 A EP03005047 A EP 03005047A EP 03005047 A EP03005047 A EP 03005047A EP 1333700 A2 EP1333700 A2 EP 1333700A2
Authority
EP
European Patent Office
Prior art keywords
frequency
transposition
function
hearing device
frequency transposition
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Withdrawn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
EP03005047A
Other languages
German (de)
English (en)
Other versions
EP1333700A3 (fr
Inventor
Silvia Allegro
Olegs Timms
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.)
Sonova Holding AG
Original Assignee
Phonak AG
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 Phonak AG filed Critical Phonak AG
Priority to EP03005047A priority Critical patent/EP1333700A3/fr
Publication of EP1333700A2 publication Critical patent/EP1333700A2/fr
Publication of EP1333700A3 publication Critical patent/EP1333700A3/fr
Priority to EP20040005270 priority patent/EP1441562B1/fr
Priority to DK04005270T priority patent/DK1441562T3/da
Priority to DE200460026233 priority patent/DE602004026233D1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • H04R25/35—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
    • 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
    • G10L21/0316—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude
    • G10L21/0364—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude for improving intelligibility
    • 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
    • G10L21/06—Transformation of speech into a non-audible representation, e.g. speech visualisation or speech processing for tactile aids
    • G10L2021/065—Aids for the handicapped in understanding
    • 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

Definitions

  • the present invention relates to a method for frequency transposition in a hearing device according to the pre-characterizing part of claim 1, to a hearing device according to the pre-characterizing part of claim 7 as well as to a use of the method for a binaural hearing device.
  • frequency shifting The many techniques for frequency transposition reported previously can be subdivided into three broad types: frequency shifting, frequency compression, and reducing the playback speed of recorded audio signals while discarding portions of the signal in order to preserve the original duration.
  • frequency-transposing hearing instruments available commercially are those manufactured by AVR Ltd., a company based in Israel and Minnesota, USA (see http://www.avrsono.com ).
  • the reported-algorithm multiplies each frequency bin by a constant factor (less than 1) to produce the desired output signal in the frequency domain.
  • a constant factor less than 1
  • Data loss resulting from this compression of the spectrum is minimized by linear interpolation across frequencies.
  • the output signal is then converted back into the time domain by means of an inverse FFT (IFFT).
  • IFFT inverse FFT
  • a feature extraction and signal resynthesis procedure and system based on a vocoder have been described by Thomson CSF, Paris in EP-1 006 511. Information about pitch, voicing, energy, and spectral shape is extracted from the input signal. These features are modified (e.g. by compressing the formant frequencies in the frequency domain) and then used for synthesis of the output signal by means of a vocoder (i.e. a relatively efficient electronic or computational device or technique for synthesizing speech signals).
  • a vocoder i.e. a relatively efficient electronic or computational device or technique for synthesizing speech signals.
  • a very similar approach has also been described by Strong and Palmer in US-4 051 331. Their signal synthesis is also based on modified speech features. However, it synthesizes voiced components using tones, and unvoiced components using narrow-band noises. Thus, these techniques are spectrum-destroying rather than spectrum-preserving.
  • a phase vocoder system for frequency transposition is described in a paper by H. J. McDermott and M. R. Dean ("Speech perception with steeply sloping hearing loss", British Journal of Audiology, vol 34, pp 353-361, December 2000).
  • a non-real-time implementation is disclosed using a computer program. Digitally recorded speech signals were low pass filtered, down sampled and windowed, and then processed by a FFT. The phase values from successive FFTs were used to estimate a more precise frequency for each FFT bin, which was used to tune an oscillator corresponding to each FFT bin. Frequency lowering was achieved by multiplying the frequency estimates for each FFT-bin by a constant factor.
  • a problem with each of the above feature-extraction and resynthesis processing schemes is that it is technically extremely difficult to obtain reliable estimates of speech features (such as fundamental frequency and voicing) in a wearable, real-time hearing instrument, especially in unfavorable listening conditions such as when noise or reverberation is present.
  • EP-0 054 450 describes the transposition and amplification of two or three different bands of the frequency spectrum into lower-frequency bands within the audible range.
  • the number of "image" bands equals the number of original bands.
  • the frequency compression ratio can be different across bands, but is constant within each band.
  • the image bands are arranged contiguously, and transposed to frequencies above 500 Hz. In order to free this part of the spectrum for the image bands, the amplification for frequencies between 500 and 1000 Hz decreases gradually with increasing frequency. Frequencies below 500 Hz in the original signal are amplified with a constant gain.
  • the input signal is subjected to adaptive noise canceling before filtering into at least two pass-bands takes place. Frequency compression is then carried out in at least one frequency band.
  • frequency transposition is a potential means for providing profoundly hearing impaired patients with signals in their residual range.
  • the process of frequency transposition is illustrated in Fig. 1, wherein the magnitude spectrum
  • a frequency band FB is transposed by a frequency transposition function to obtain a transposed magnitude spectrum
  • linear frequency transposition (as it is shown in Figs. 3 and 4 by the dashed line), or linear frequency transposition applied to only parts of the spectrum of a acoustic signal, is the only meaningful scheme since all nonlinear frequency transposition methods of the state of the art distort the signal in such a manner that potential subjects reject the processing.
  • the application of linear frequency transposition is however limited in that in order to preserve a reasonable intelligibility of the speech signal, the frequency span of the compressed signal should not be less that 60 to 70% of the original bandwidth.
  • Nonlinear transposition schemes were not considered so far because the distortion of the harmonic relationship in lower frequencies has a detrimental effect on vowel recognition and is therefore totally unacceptable.
  • Fig. 2 shows a simplified block diagram of a digital hearing device according to the present invention comprising a microphone 1, an analog-to-digital converter unit 2, a transformation unit 3, a signal processing unit 4, an inverse transformation unit 5, a digital-to-analog converter unit 5 and a loudspeaker 7, also called receiver.
  • the invention is not only suitable for implementation in a digital hearing device but can also readily be implemented in an analog hearing device. In the latter case, the analog-to-digital converter unit 2 and the digital-to-analog converter unit 6 are not necessary.
  • a so called VOCODER is used in which the output signal is synthesized.
  • VOCODER for further information regarding the functioning of a VOCODER, reference is made to H. J. McDermott and M. R. Dean ("Speech perception with steeply sloping hearing loss", British Journal of Audiology, vol 34, pp 353-361, December 2000).
  • an implementation of the invention is not only limited to conventional hearing devices, such as BTE-(behind the ear), CIC-(completely in the canal) or ITE-(in the ear) hearing devices.
  • An implementation in implantable devices is also possible.
  • a transducer is used instead of the loudspeaker 7 which transducer is either operationally connected to the signal processing unit 4, or to the inverse transformation unit 5, or to the digital-to-analog converter unit 6, and which transducer is made for direct transmitting acoustical information to the middle or inner ear of the patient.
  • the sampled acoustic signal s(n) is transformed into the frequency domain by an appropriate frequency transformation function in order to obtain the discrete spectrum S(m).
  • a Fast Fourier Transformation is applied in the transformation unit 3.
  • a frequency transposition is being applied to the spectrum S(m) in order to obtain a transposed spectrum S'(m'), whereby the frequency transposition is being defined by a nonlinear frequency transposition function.
  • the nonlinear frequency transposition function has a perception-based scale, such as the Bark, ERB or SPINC scale.
  • Bark reference is made to E. Zwicker and H. Fastl in "Psychoacoustics - Facts and Models” (2nd edition, Springer, 1999)
  • ERB reference is made to B. C. J. Moore and B. R. Glasberg in "Suggested formulae for calculating auditory-filter bandwidths and excitation patterns" (J. Acoust. Soc. Am., Vol. 74, no. 3, pp.
  • Figs. 3 and 4 show different frequency transposition functions and transposition factors, wherein the horizontal axis represents the input frequency f and the vertical axis represents the corresponding output frequency f'.
  • the graphs drawn by a dotted line represent different frequency transposition functions according to the present invention.
  • the graphs drawn by solid and dashed lines are for comparison and show corresponding state of the art frequency transposition functions.
  • the frequency transposition function is stored in a look-up table which is provided in the signal processing unit 4, or which look-up table can be easily accessed by the signal processing unit 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Quality & Reliability (AREA)
  • Computational Linguistics (AREA)
  • Multimedia (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
EP03005047A 2003-03-06 2003-03-06 Procédé de transposition de fréquence dans une prothèse auditive et une telle prothèse auditive Withdrawn EP1333700A3 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP03005047A EP1333700A3 (fr) 2003-03-06 2003-03-06 Procédé de transposition de fréquence dans une prothèse auditive et une telle prothèse auditive
EP20040005270 EP1441562B1 (fr) 2003-03-06 2004-03-05 Procédé de transposition de fréquence et utilisation du procédé dans une prothèse auditive et un dispositif de communication
DK04005270T DK1441562T3 (da) 2003-03-06 2004-03-05 Fremgangsmåde til frekvenstransposition og anvendelse af fremgangsmåden i et høreapparat og et kommunikationsapparat
DE200460026233 DE602004026233D1 (de) 2003-03-06 2004-03-05 Verfahren zur Frequenzumsetzung und Nutzung des Verfahrens in einem Hörgerät und einer Kommunikationsvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03005047A EP1333700A3 (fr) 2003-03-06 2003-03-06 Procédé de transposition de fréquence dans une prothèse auditive et une telle prothèse auditive

Publications (2)

Publication Number Publication Date
EP1333700A2 true EP1333700A2 (fr) 2003-08-06
EP1333700A3 EP1333700A3 (fr) 2003-09-17

Family

ID=8185870

Family Applications (2)

Application Number Title Priority Date Filing Date
EP03005047A Withdrawn EP1333700A3 (fr) 2003-03-06 2003-03-06 Procédé de transposition de fréquence dans une prothèse auditive et une telle prothèse auditive
EP20040005270 Expired - Lifetime EP1441562B1 (fr) 2003-03-06 2004-03-05 Procédé de transposition de fréquence et utilisation du procédé dans une prothèse auditive et un dispositif de communication

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20040005270 Expired - Lifetime EP1441562B1 (fr) 2003-03-06 2004-03-05 Procédé de transposition de fréquence et utilisation du procédé dans une prothèse auditive et un dispositif de communication

Country Status (3)

Country Link
EP (2) EP1333700A3 (fr)
DE (1) DE602004026233D1 (fr)
DK (1) DK1441562T3 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1661434A1 (fr) * 2003-08-11 2006-05-31 Vast Audio Pty Ltd Procede d'augmentation du son pour malentendants
DE102008049466A1 (de) * 2008-09-29 2010-04-08 Siemens Medical Instruments Pte. Ltd. Verfahren zum Betrieb einer Hörhilfe und Hörhilfe
DE102008064382A1 (de) * 2008-12-22 2010-07-08 Siemens Medical Instruments Pte. Ltd. Hörvorrichtung mit Transpositionsmöglichkeit und entsprechendes Verfahren
EP2252081A2 (fr) 2009-05-14 2010-11-17 Siemens Medical Instruments Pte. Ltd. Appareil auditif binaural et procédé de fonctionnement d'un tel dispositif auditif binaural avec ajustement fréquentiel non linéaire
AU2004201374B2 (en) * 2004-04-01 2010-12-23 Phonak Ag Audio amplification apparatus
EP2372707A1 (fr) 2010-03-15 2011-10-05 Svox AG Transformation spectrale adaptative pour signaux vocaux acoustiques
EP2375782A1 (fr) * 2010-04-09 2011-10-12 Oticon A/S Améliorations de la perception sonore utilisant une transposition de fréquence en déplaçant l'enveloppe
DE102010041653A1 (de) 2010-09-29 2012-03-29 Siemens Medical Instruments Pte. Ltd. Verfahren und Vorrichtung zur Frequenzkompression mit selektiver Frequenzverschiebung
EP2337378A3 (fr) * 2009-12-16 2013-01-09 Siemens Medical Instruments Pte. Ltd. Procédé de transposition de fréquence dans un appareil auditif et appareil auditif
US9179222B2 (en) 2013-06-06 2015-11-03 Cochlear Limited Signal processing for hearing prostheses

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2005201813B2 (en) * 2005-04-29 2011-03-24 Phonak Ag Sound processing with frequency transposition
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
DK1941782T3 (en) 2005-10-18 2018-08-20 Widex As EQUIPMENT FOR PROGRAMMING A HEARING AND HEARING
WO2007135198A2 (fr) 2007-07-31 2007-11-29 Phonak Ag Procédé de réglage d'un appareil auditif par transposition de fréquence et ensemble correspondant
DE102010041643B4 (de) 2010-09-29 2014-01-30 Siemens Medical Instruments Pte. Ltd. Hörhilfegerät zur Frequenzkompression
DE102011006148B4 (de) * 2010-11-04 2015-01-08 Siemens Medical Instruments Pte. Ltd. Kommunikationssystem mit Telefon und Hörvorrichtung sowie Übertragungsverfahren
DE102011006511B4 (de) 2011-03-31 2016-07-14 Sivantos Pte. Ltd. Hörhilfegerät sowie Verfahren zum Betrieb eines Hörhilfegeräts
DE102011006472B4 (de) 2011-03-31 2013-08-14 Siemens Medical Instruments Pte. Ltd. Verfahren zur Verbesserung der Sprachverständlichkeit mit einem Hörhilfegerät sowie Hörhilfegerät
DE102011006515A1 (de) 2011-03-31 2012-10-04 Siemens Medical Instruments Pte. Ltd. Verfahren zur Verbesserung der Sprachverständlichkeit mit einem Hörhilfegerät sowie Hörhilfegerät
US9319804B2 (en) * 2011-06-23 2016-04-19 Sonova Ag Method for operating a hearing device as well as a hearing device
US10129659B2 (en) 2015-05-08 2018-11-13 Doly International AB Dialog enhancement complemented with frequency transposition
US11184715B1 (en) 2020-10-05 2021-11-23 Sonova Ag Hearing devices and methods for implementing an adaptively adjusted cut-off frequency
US11962980B2 (en) 2021-01-28 2024-04-16 Sonova Ag Hearing evaluation systems and methods implementing a spectro-temporally modulated audio signal

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0054450A1 (fr) * 1980-11-28 1982-06-23 Jean-Claude Lafon Perfectionnements aux dispositifs de prothèse auditive
US4982434A (en) * 1989-05-30 1991-01-01 Center For Innovative Technology Supersonic bone conduction hearing aid and method
WO1999014986A1 (fr) * 1997-09-19 1999-03-25 University Of Iowa Research Foundation Prothese auditive avec compression de frequence proportionnelle et decalage de signaux audio
WO2000075920A1 (fr) * 1999-06-03 2000-12-14 Telefonaktiebolaget Lm Ericsson (Publ) Procede permettant d'ameliorer l'intelligibilite d'un signal sonore, et dispositif de reproduction d'un signal sonore

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT398670B (de) * 1991-11-13 1995-01-25 Viennatone Gmbh Verfahren zur verschiebung der frequenz von signalen
FR2706103B1 (fr) * 1993-06-03 1997-01-31 Ericsson Ge Mobile Communicat Appareil radiotéléphonique.
US5479522A (en) * 1993-09-17 1995-12-26 Audiologic, Inc. Binaural hearing aid

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0054450A1 (fr) * 1980-11-28 1982-06-23 Jean-Claude Lafon Perfectionnements aux dispositifs de prothèse auditive
US4982434A (en) * 1989-05-30 1991-01-01 Center For Innovative Technology Supersonic bone conduction hearing aid and method
WO1999014986A1 (fr) * 1997-09-19 1999-03-25 University Of Iowa Research Foundation Prothese auditive avec compression de frequence proportionnelle et decalage de signaux audio
WO2000075920A1 (fr) * 1999-06-03 2000-12-14 Telefonaktiebolaget Lm Ericsson (Publ) Procede permettant d'ameliorer l'intelligibilite d'un signal sonore, et dispositif de reproduction d'un signal sonore

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
XUEDONG HUANG, ALEX ACERO, HSIAO-WUEN HON: "Spoken Language Processing" 2001 , PRENTICE HALL PTR , UPPER SADDLE RIVER, NEW JERSEY XP002248543 ISBN: 0-13-022616-5 * page 29, line 1 - page 36, line 8 * *

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1661434A4 (fr) * 2003-08-11 2007-08-22 Vast Audio Pty Ltd Procede d'augmentation du son pour malentendants
EP1661434A1 (fr) * 2003-08-11 2006-05-31 Vast Audio Pty Ltd Procede d'augmentation du son pour malentendants
US8351626B2 (en) 2004-04-01 2013-01-08 Phonak Ag Audio amplification apparatus
AU2004201374B2 (en) * 2004-04-01 2010-12-23 Phonak Ag Audio amplification apparatus
DE102008049466A1 (de) * 2008-09-29 2010-04-08 Siemens Medical Instruments Pte. Ltd. Verfahren zum Betrieb einer Hörhilfe und Hörhilfe
DE102008064382A1 (de) * 2008-12-22 2010-07-08 Siemens Medical Instruments Pte. Ltd. Hörvorrichtung mit Transpositionsmöglichkeit und entsprechendes Verfahren
EP2252081A2 (fr) 2009-05-14 2010-11-17 Siemens Medical Instruments Pte. Ltd. Appareil auditif binaural et procédé de fonctionnement d'un tel dispositif auditif binaural avec ajustement fréquentiel non linéaire
DE102009021310A1 (de) * 2009-05-14 2010-12-30 Siemens Medical Instruments Pte. Ltd. Binaurale Hörvorrichtung und Verfahren zum Betrieb einer binauralen Hörvorrichtung mit Frequenzverzerrung
DE102009021310B4 (de) * 2009-05-14 2011-02-24 Siemens Medical Instruments Pte. Ltd. Binaurale Hörvorrichtung und Verfahren zum Betrieb einer binauralen Hörvorrichtung mit Frequenzverzerrung
US8611571B2 (en) 2009-05-14 2013-12-17 Siemens Medical Instruments Pte. Ltd. Binaural hearing apparatus and method for operating a binaural hearing apparatus with frequency distortion
EP2337378A3 (fr) * 2009-12-16 2013-01-09 Siemens Medical Instruments Pte. Ltd. Procédé de transposition de fréquence dans un appareil auditif et appareil auditif
EP2372707A1 (fr) 2010-03-15 2011-10-05 Svox AG Transformation spectrale adaptative pour signaux vocaux acoustiques
CN102354497A (zh) * 2010-04-09 2012-02-15 奥迪康有限公司 使用频率变换通过移动包络对声音感知的改进
EP2375782A1 (fr) * 2010-04-09 2011-10-12 Oticon A/S Améliorations de la perception sonore utilisant une transposition de fréquence en déplaçant l'enveloppe
US8949113B2 (en) 2010-04-09 2015-02-03 Oticon A/S Sound perception using frequency transposition by moving the envelope
CN102354497B (zh) * 2010-04-09 2015-08-12 奥迪康有限公司 使用频率变换通过移动包络对声音感知的改进
EP2437258A2 (fr) 2010-09-29 2012-04-04 Siemens Medical Instruments Pte. Ltd. Procédé et dispositif de compression de fréquence à décalage de fréquence sélectif
DE102010041653A1 (de) 2010-09-29 2012-03-29 Siemens Medical Instruments Pte. Ltd. Verfahren und Vorrichtung zur Frequenzkompression mit selektiver Frequenzverschiebung
EP2437258A3 (fr) * 2010-09-29 2013-09-04 Siemens Medical Instruments Pte. Ltd. Procédé et dispositif de compression de fréquence à décalage de fréquence sélectif
DE102010041653B4 (de) * 2010-09-29 2015-04-02 Siemens Medical Instruments Pte. Ltd. Verfahren und Vorrichtung zur Frequenzkompression mit selektiver Frequenzverschiebung
US9031269B2 (en) 2010-09-29 2015-05-12 Siemens Medical Instruments Pte. Ltd. Method and device for frequency compression with selective frequency shifting
US9179222B2 (en) 2013-06-06 2015-11-03 Cochlear Limited Signal processing for hearing prostheses
US9794698B2 (en) 2013-06-06 2017-10-17 Cochlear Limited Signal processing for hearing prostheses

Also Published As

Publication number Publication date
EP1441562A2 (fr) 2004-07-28
EP1333700A3 (fr) 2003-09-17
EP1441562A3 (fr) 2007-11-21
DK1441562T3 (da) 2010-07-19
DE602004026233D1 (de) 2010-05-12
EP1441562B1 (fr) 2010-03-31

Similar Documents

Publication Publication Date Title
US7248711B2 (en) Method for frequency transposition and use of the method in a hearing device and a communication device
EP1333700A2 (fr) Procédé de transposition de fréquence dans une prothèse auditive et une telle prothèse auditive
US20040175010A1 (en) Method for frequency transposition in a hearing device and a hearing device
US7343022B2 (en) Spectral enhancement using digital frequency warping
US8098859B2 (en) Methods, devices and systems using signal processing algorithms to improve speech intelligibility and listening comfort
EP1661434B1 (fr) Procede d'augmentation du son pour malentendants
JP4759052B2 (ja) 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
US6212496B1 (en) Customizing audio output to a user's hearing in a digital telephone
EP1236377B1 (fr) Dispositif d'aide a l'audition incorporant des techniques de traitement des signaux
CN111107478B (zh) 一种声音增强方法及声音增强系统
AU2002300314B2 (en) Apparatus And Method For Frequency Transposition In Hearing Aids
US20090257609A1 (en) Method for Noise Reduction and Associated Hearing Device
EP2675191B1 (fr) Translation de fréquence dans des dispositifs d'assistance auditive par synthèse spectrale additive
DK2584795T3 (da) Fremgangsmåde til bestemmelse af en kompressionskarakteristik
EP2337378A2 (fr) Procédé de transposition de fréquence dans un appareil auditif et appareil auditif
Muñoz et al. Frequency lowering processing for listeners with significant hearing loss
US9258655B2 (en) Method and device for frequency compression with harmonic correction
JPH07146700A (ja) ピッチ強調方法および装置ならびに聴力補償装置
DE102011006472B4 (de) Verfahren zur Verbesserung der Sprachverständlichkeit mit einem Hörhilfegerät sowie Hörhilfegerät
Marotta et al. Comparison of two frequency lowering algorithms for digital hearing aids.
WO2017025107A2 (fr) Dispositif auditif spécifique du langage, de l'âge et du genre de l'interlocuteur
Madhusudhanan et al. Vlsi Based Performance Improvement in Digital Hearing Aid Using Reconfigurable Filter
WO2004059614A2 (fr) Procede et appareil permettant d'augmenter la qualite de perception de signaux de parole synthetises

Legal Events

Date Code Title Description
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

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO

17P Request for examination filed

Effective date: 20031129

17Q First examination report despatched

Effective date: 20040212

AKX Designation fees paid

Designated state(s): CH DE DK LI

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: 20040623