EP2337378A2 - Procédé de transposition de fréquence dans un appareil auditif et appareil auditif - Google Patents

Procédé de transposition de fréquence dans un appareil auditif et appareil auditif Download PDF

Info

Publication number
EP2337378A2
EP2337378A2 EP10192004A EP10192004A EP2337378A2 EP 2337378 A2 EP2337378 A2 EP 2337378A2 EP 10192004 A EP10192004 A EP 10192004A EP 10192004 A EP10192004 A EP 10192004A EP 2337378 A2 EP2337378 A2 EP 2337378A2
Authority
EP
European Patent Office
Prior art keywords
frequency
transposition
sound
hearing aid
transposed
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Withdrawn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
EP10192004A
Other languages
German (de)
English (en)
Other versions
EP2337378A3 (fr
Inventor
Andreas Tiefenau
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.)
Sivantos Pte Ltd
Original Assignee
Siemens Medical Instruments Pte Ltd
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 Medical Instruments Pte Ltd filed Critical Siemens Medical Instruments Pte Ltd
Publication of EP2337378A2 publication Critical patent/EP2337378A2/fr
Publication of EP2337378A3 publication Critical patent/EP2337378A3/fr
Withdrawn legal-status Critical Current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; 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 relates to a method for frequency transposition in a hearing aid device and to a hearing aid device for carrying out the method.
  • An example of a continuous transposition function with a linear frequency compression above 2 kHz shows the characteristic according to FIG. 1 , Below the knee-point frequency of 2 kHz, no frequency transposition occurs in this example. From 2 kHz, a linear compression with the compression factor 2/3, so that, for example, an input signal with a frequency of 5 kHz is output with the output frequency 4 kHz.
  • a method for frequency transposition in a hearing aid device and a hearing aid device for carrying out a frequency transposition are disclosed in the document EP 1 441 562 A2 known.
  • Pure sine tones are virtually nonexistent in nature. At most they can be created artificially by means of a synthesizer. However, humans perceive sounds composed of a fundamental and one or more harmonic overtones as (natural) sound, that is, as an acoustic signal of a particular frequency.
  • the harmonic overtones are characterized by the fact that their frequency corresponds to an integer multiple of the fundamental frequency.
  • the natural sound or sound has vibration components at different frequencies.
  • a nonlinear and / or limited to only a portion of the audible frequency range frequency transposition therefore has the consequence that the perception of natural sounds or sounds is disturbed.
  • a shift in the overtone spectrum can lead to the perception of virtual, that is, in the acoustic signal non-existent fundamental tones, on the other hand, it may also happen that no associated fundamental tone is perceived for a compressed overtone spectrum.
  • the determination of sounds, that is, of fundamental tones and associated harmonics, from an acoustic input signal is for example from the document JP2004109742 A known.
  • a hearing aid with a transposition device known.
  • a specific frequency range of the input signal can be shifted to a different frequency range of the output signal.
  • the shift is preferably carried out for each frequency of the frequency range to be shifted by a semitone or integer multiples of a half tone, for example by a frequency doubling or halving.
  • the sound characteristic is retained even after the transposition of sounds present in the input signal.
  • Object of the present invention is to avoid caused by a frequency transposition perception disorders in sounds.
  • This object is achieved by a method for frequency transposition in a hearing aid with the method steps mentioned in claim 1. Furthermore, the object is achieved by a hearing aid according to claim 6.
  • a hearing aid device is understood to mean any device which provides or helps to provide an output signal perceptible by a user as an audible signal, and which has means which help or compensate for an individual hearing loss of the user.
  • this is a hearing aid that can be worn on the body or on the head, in particular on or in the ear, as well as being fully or partially implantable.
  • such devices are also included, whose primary purpose is not to compensate for hearing loss, such as consumer electronics (TVs, hi-fi systems, MP3 players, etc.), or communication devices (mobile phones, PDAs, headsets etc), but over Have means to compensate for an individual hearing loss.
  • a hearing aid typically includes an input transducer for receiving an input signal.
  • the input transducer is designed, for example, as a microphone which picks up an acoustic signal and converts it into an electrical input signal.
  • input transducers are also units into consideration, which have a coil or an antenna and receive an electromagnetic signal and convert it into an electrical input signal.
  • a hearing device usually comprises a signal processing unit for processing and frequency-dependent amplification of the electrical input signal.
  • DSP digital signal processor
  • the mode of operation of the signal processing unit can be adapted both to the individual hearing loss of a hearing aid wearer and to the current hearing situation in which the hearing aid is currently being operated.
  • the thus changed electrical input signal is finally fed to an output transducer.
  • This is usually designed as a handset, which converts the electrical output signal into an acoustic signal.
  • an implantable output transducer which is directly connected to a ossicle and this stimulates to vibrate.
  • the hearing aid has means for detecting sounds contained in the electrical input signal, e.g. of vowels, nasals or music sounds.
  • Each sound is composed of the fundamental frequency (the fundamental tone) and several harmonics whose frequency is an integer multiple of the fundamental frequency.
  • the determination takes place in particular by means of a spectral analysis.
  • the electrical input signal is preferably transformed from the time domain to the frequency domain, e.g. by means of an FFT (Fast Fourier Transformation).
  • FFT Fast Fourier Transformation
  • a frequency transposition is performed by the hearing aid according to the invention. Except for the exceptional case of a linear frequency transposition, which extends over the entire transmittable frequency range, existing sounds in the input signal are usually destroyed because after the frequency transposition the overtones of an originally present sound no longer an integer multiple of (possibly also transposed ) Have fundamental frequency.
  • the basic idea of the invention is now in, at the sounds, whose sound characteristic is lost by the frequency transposition to restore them by an adaptive control of the frequency transposition.
  • the frequency transposition takes place in dependence on the fundamental frequency of a detected sound.
  • the harmonics of a sound are shifted in terms of their signal frequency that they fall back to an integer multiple of - possibly also shifted - fundamental frequency.
  • a sound present in the input signal is again perceived as a sound after the frequency transposition, but only at a different frequency.
  • FIG. 1 shows a compression characteristic of a hearing aid, in which an input signal (IN) above the knee point of 2000 Hz (2 kHz) is compressed in terms of signal frequency.
  • the frequency range from 2000 Hz to 5000 Hz is mapped to the frequency range 2000 Hz to 4000 Hz of the output signal (OUT).
  • FIG. 2 shows in a simplified block diagram the structure of a hearing aid according to the prior art.
  • Hearing aids have in principle as essential components one or more input transducers, an amplifier and an output transducer.
  • the input transducer is usually a sound receiver, z. As a microphone, or an electromagnetic receiver, for. B. an induction coil.
  • the output transducer is usually used as an electroacoustic transducer, z. As miniature speaker or handset, or as an electromechanical transducer, z. B. bone conduction, realized.
  • the amplifier is usually integrated in a signal processing unit. This basic structure is in FIG. 2 shown using the example of a behind-the-ear hearing aid.
  • a hearing aid housing 1 for carrying behind the ear, one or more microphones 2 for receiving the sound from the environment are installed.
  • a signal processing unit 3 which is also integrated in the hearing aid housing 1, processes the microphone signals and amplifies them.
  • the output signal of the signal processing unit 3 is transmitted to a loudspeaker or earpiece 4, which outputs an acoustic signal.
  • the sound is optionally transmitted via a sound tube, which is fixed with an earmold in the ear canal, to the eardrum of the device carrier.
  • the power supply of the hearing device and in particular the signal processing unit 3 is effected by a likewise integrated into the hearing aid housing 1 battery. 5
  • FIG. 3 are the effects of a frequency transposition according to FIG. 1 to a sound having a fundamental frequency GF at 400 Hz and overtones at 800 Hz, 1,200 Hz, 1,600 Hz, 2,000 Hz, 2,400 Hz, 2,800 Hz, 3,200 Hz, 3,600 Hz, 4,000 Hz, 4,400 Hz and 4,800 Hz by circles at the respective signal frequency and associated signal level P. Also shown are in the form of black squares transposed above 2 kHz overtones at the frequencies 2267 Hz, 2533 Hz, 2800 Hz, 3067 Hz, 3333 Hz, 3600 Hz and 3867 Hz (on integer values rounded). However, this harmonic spectrum would include a virtual fundamental frequency not present in the original sound at 267 Hz (rounded). The perception of the originally existing sound is thus disturbed by the frequency transposition.
  • a first possibility of the invention consists in assigning the transposed overtones of the sound back to the originally existing 400 Hz raster, such that each transposed overtone is shifted to the nearest frequency in the 400 Hz raster. Accordingly, the transposed harmonics at 2267 Hz and 2533 Hz are shifted to the signal frequency 2400 Hz, the transposed harmonics at 3067 Hz and 3333 Hz to the signal frequency 3200 Hz and the transposed overtone at 3867 Hz to the signal frequency 4000 Hz.
  • the transposed harmonics at 2800 Hz and 3600 Hz are already on the 400 Hz pitch of the sound and therefore do not need to be shifted.
  • the spectrum of the original sound and the sound transposed according to the embodiment are shown in FIG FIG. 4 shown.
  • At least one sound is determined in a sound signal and a frequency transposition is performed in dependence on a determined fundamental frequency of the sound such that at least one frequency range is transposed into another frequency range as a function of a transposition function and transposed harmonics of the sound towards the nearest integer multiple the fundamental frequency are shifted.
  • the fundamental frequency it can be to the fundamental frequency of the original sound or to a deviating from this fundamental frequency fundamental frequency of the transposed sound act.
  • a frequency transposition according to a certain transposition function thus initially takes place for an input signal as before.
  • a further frequency transposition takes place as a function of a determined fundamental frequency of a sound.
  • the last-mentioned possibility for example by programming the hearing aid, either switched on or off.
  • a further possibility of the invention is to shift the overtones transposed initially according to a transposition function to the respectively lower frequency of the original 400 Hz raster of the sound. Accordingly, the transposed overtone at 2267 Hz to the signal frequency 2000 Hz, the transposed overtone at 2533 Hz to the signal frequency 2400 Hz, the transposed overtone at 3067 Hz to the signal frequency 2800 Hz, the transposed overtone at 3333 Hz to the signal frequency 3200 Hz and the transposed overtone at 3867 Hz shifted to the signal frequency 3600 Hz.
  • the spectrum of the original sound and the transposed sound according to this embodiment are shown in FIG FIG. 5 shown.
  • At least one sound is determined in a sound signal and a frequency transposition in dependence on a determined fundamental frequency of the sound is performed such that at least one frequency range is transposed into another frequency range as a function of a transposition function and transposed overtones of the sound are shifted to the next lower integer multiple of the fundamental frequency become.
  • Another possibility of the invention is to shift the overtone spectrum of a sound in a certain frequency range as a whole. This is in FIG. 6 represented, wherein all originally existing overtones are shifted above 2 kHz by twice the fundamental frequency, ie in the exemplary embodiment by 800 Hz, towards lower frequencies.
  • the signal processing in the hearing aid in particular the finding of sounds in the input signal, the frequency transposition as well as the adjustment according to the invention of the signal frequency of the transposed harmonics to obtain the sound property are preferably carried out in the frequency domain.
  • a transformation of the input signal in the frequency domain and a subsequent inverse transformation are preferably carried out in the signal processing.

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)
  • Circuit For Audible Band Transducer (AREA)
EP10192004A 2009-12-16 2010-11-22 Procédé de transposition de fréquence dans un appareil auditif et appareil auditif Withdrawn EP2337378A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009058415A DE102009058415B4 (de) 2009-12-16 2009-12-16 Verfahren zur Frequenztransposition bei einem Hörhilfegerät sowie Hörhilfegerät

Publications (2)

Publication Number Publication Date
EP2337378A2 true EP2337378A2 (fr) 2011-06-22
EP2337378A3 EP2337378A3 (fr) 2013-01-09

Family

ID=43756364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10192004A Withdrawn EP2337378A3 (fr) 2009-12-16 2010-11-22 Procédé de transposition de fréquence dans un appareil auditif et appareil auditif

Country Status (3)

Country Link
US (1) US20110142271A1 (fr)
EP (1) EP2337378A3 (fr)
DE (1) DE102009058415B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2437521B2 (fr) † 2010-09-29 2017-09-13 Sivantos Pte. Ltd. Procédé de compression fréquentielle à l'aide d'une correction harmonique et dispositif correspondant

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011085036A1 (de) 2011-10-21 2013-04-25 Siemens Medical Instruments Pte. Ltd. Verfahren zum Ermitteln einer Kompressionskennlinie
WO2014114337A1 (fr) * 2013-01-24 2014-07-31 Advanced Bionics Ag Système auditif comprenant une prothèse auditive et une aide auditive
US10390147B2 (en) * 2015-02-24 2019-08-20 Gn Hearing A/S Frequency mapping for hearing devices

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004109742A (ja) 2002-09-20 2004-04-08 Nippon Telegr & Teleph Corp <Ntt> 調波構造区間推定方法及び装置、調波構造区間推定プログラム及びそのプログラムを記録した記録媒体、調波構造区間推定の閾値決定方法及び装置、調波構造区間推定の閾値決定プログラム及びそのプログラムを記録した記録媒体
EP1441562A2 (fr) 2003-03-06 2004-07-28 Phonak Ag Procédé de transposition de fréquence et utilisation du procédé dans une prothèse auditive et un dispositif de communication
DE102006019728A1 (de) 2006-04-27 2007-11-15 Siemens Audiologische Technik Gmbh Zeit-adaptives Einstellen einer Hörhilfevorrichtung und entsprechendes Verfahren
DE102008064382A1 (de) 2008-12-22 2010-07-08 Siemens Medical Instruments Pte. Ltd. Hörvorrichtung mit Transpositionsmöglichkeit und entsprechendes Verfahren

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4366349A (en) * 1980-04-28 1982-12-28 Adelman Roger A Generalized signal processing hearing aid
US6577739B1 (en) * 1997-09-19 2003-06-10 University Of Iowa Research Foundation Apparatus and methods for proportional audio compression and frequency shifting
US20040175010A1 (en) * 2003-03-06 2004-09-09 Silvia Allegro Method for frequency transposition in a hearing device and a hearing device
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
WO2009143898A1 (fr) * 2008-05-30 2009-12-03 Phonak Ag Procédé permettant l’adaptation du son par modification de fréquence dans une prothèse auditive, et prothèse auditive

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004109742A (ja) 2002-09-20 2004-04-08 Nippon Telegr & Teleph Corp <Ntt> 調波構造区間推定方法及び装置、調波構造区間推定プログラム及びそのプログラムを記録した記録媒体、調波構造区間推定の閾値決定方法及び装置、調波構造区間推定の閾値決定プログラム及びそのプログラムを記録した記録媒体
EP1441562A2 (fr) 2003-03-06 2004-07-28 Phonak Ag Procédé de transposition de fréquence et utilisation du procédé dans une prothèse auditive et un dispositif de communication
DE102006019728A1 (de) 2006-04-27 2007-11-15 Siemens Audiologische Technik Gmbh Zeit-adaptives Einstellen einer Hörhilfevorrichtung und entsprechendes Verfahren
DE102008064382A1 (de) 2008-12-22 2010-07-08 Siemens Medical Instruments Pte. Ltd. Hörvorrichtung mit Transpositionsmöglichkeit und entsprechendes Verfahren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2437521B2 (fr) † 2010-09-29 2017-09-13 Sivantos Pte. Ltd. Procédé de compression fréquentielle à l'aide d'une correction harmonique et dispositif correspondant

Also Published As

Publication number Publication date
DE102009058415B4 (de) 2012-12-06
EP2337378A3 (fr) 2013-01-09
US20110142271A1 (en) 2011-06-16
DE102009058415A1 (de) 2011-06-22

Similar Documents

Publication Publication Date Title
DE102007046437B4 (de) Vollautomatisches Ein-/Ausschalten bei Hörhilfegeräten
EP2180726B2 (fr) Localisation du son avec des prothèses auditives binauriculaires
DE69933141T2 (de) Tonprozessor zur adaptiven dynamikbereichsverbesserung
US7248711B2 (en) Method for frequency transposition and use of the method in a hearing device and a communication device
DE102011006471B4 (de) Hörhilfegerät sowie Hörgerätesystem mit einem Richtmikrofonsystem sowie Verfahren zum Einstellen eines Richtmikrofons bei einem Hörhilfegerät
EP2229010B1 (fr) Appareil auditif et procédé de compensation du bruit dans un appareil auditif
EP2437258B1 (fr) Procédé et dispositif de compression de fréquence à décalage de fréquence sélectif
EP2811762B1 (fr) Système binaural de formation de faisceau fondé sur la logique
DE102009058415B4 (de) Verfahren zur Frequenztransposition bei einem Hörhilfegerät sowie Hörhilfegerät
EP2822300B1 (fr) Reconnaissance de situations d&#39;écoute à l&#39;aide de différentes sources de signal
DE102012203349B4 (de) Verfahren zum Anpassen einer Hörvorrichtung anhand des Sensory Memory und Anpassvorrichtung
EP2373062A2 (fr) Procédé de réglage double pour un système auditif
EP2584795B1 (fr) Procédé de détermination d&#39;une ligne caractéristique de compression
EP2437521B2 (fr) Procédé de compression fréquentielle à l&#39;aide d&#39;une correction harmonique et dispositif correspondant
DE102011006472B4 (de) Verfahren zur Verbesserung der Sprachverständlichkeit mit einem Hörhilfegerät sowie Hörhilfegerät
EP2648424A2 (fr) Procédé de limitation du niveau de sortie pour des appareils auditifs
EP2506602B1 (fr) Appareil auditif et son procédé de fonctionnement associé
EP2506255A1 (fr) Procédé d&#39;amélioration de l&#39;intelligibilité de la parole avec un appareil auditif ainsi qu&#39;appareil auditif
DE102011087692B4 (de) Hörvorrichtung und Verfahren zur Verbesserung der Wahrnehmbarkeit eines Anteils eines Eingangssignals für einen Benutzer der Hörvorrichtung
EP2622879B1 (fr) Procédé et dispositif de compression de fréquence
EP2885926A1 (fr) Système auditif ainsi que procédé de transmission
DE102008064382A1 (de) Hörvorrichtung mit Transpositionsmöglichkeit und entsprechendes Verfahren

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

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

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: 20130710