EP2506255A1 - Procédé d'amélioration de l'intelligibilité de la parole avec un appareil auditif ainsi qu'appareil auditif - Google Patents

Procédé d'amélioration de l'intelligibilité de la parole avec un appareil auditif ainsi qu'appareil auditif Download PDF

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Publication number
EP2506255A1
EP2506255A1 EP12159050A EP12159050A EP2506255A1 EP 2506255 A1 EP2506255 A1 EP 2506255A1 EP 12159050 A EP12159050 A EP 12159050A EP 12159050 A EP12159050 A EP 12159050A EP 2506255 A1 EP2506255 A1 EP 2506255A1
Authority
EP
European Patent Office
Prior art keywords
signal
output
hearing aid
sounds
spectrum
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Withdrawn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
EP12159050A
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German (de)
English (en)
Inventor
Sebastian Pape
Maja Serman
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
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Filing date
Publication date
Application filed by Siemens Medical Instruments Pte Ltd filed Critical Siemens Medical Instruments Pte Ltd
Publication of EP2506255A1 publication Critical patent/EP2506255A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • G10L21/0208—Noise filtering
    • G10L21/0264—Noise filtering characterised by the type of parameter measurement, e.g. correlation techniques, zero crossing techniques or predictive techniques

Definitions

  • the invention relates to a method for operating a hearing aid and a hearing aid with an input transducer for receiving an input signal and conversion to an electrical input signal, a signal processing unit for processing and frequency-dependent amplification of the electrical input signal and for generating an electrical output signal and an output transducer for converting the electrical output signal in a user perceived as an acoustic output signal output signal.
  • 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.
  • Frequency transposition has two major drawbacks: spectral deterioration of the original spectral composition of certain consonants and other sounds, on the one hand, and perception on the other, the ability to differentiate between different fricatives is significantly worsened.
  • a method for a hearing aid in which sound segments, eg consonants or vowels, are detected and a multiplication factor is determined based on the respective type of the sound segment from a table, with which the temporal resolution of the sound segment is adapted.
  • Object of the present invention is to understand the language of hearing loss, in which certain frequency ranges even at high volume or gain can no longer be perceived to improve.
  • 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 involves a hearing aid device 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 generally 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 aid usually includes 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, in addition to the usual components (input transducer, signal processing unit, output transducer) via a sound detector device for detecting sounds, in particular consonants or fricatives, in a speech signal incoming to the hearing aid.
  • the hearing aid according to the invention has a lookup table (a "code book"), which is stored for example in a memory and in the particular sounds or consonants each assigned a specific output code.
  • the hearing aid according to the invention has an encoder, are replaced by the sounds contained in the input signal or consonants in the resulting output signal in each case by the associated output code.
  • a sound is generally a sound or sound produced by the human or animal voice.
  • a sound in the narrower sense is a defined sound wave produced by the flow of the breath (the phonatory current) at a certain position of the speech tools.
  • the generation and perception of sounds is the subject of phonetics.
  • a phoneme or phon is understood as the smallest phonetic unit of the spoken language.
  • consonant in the context of the invention is generally understood a sound whose articulation includes a narrowing of the vocal tract, so that the respiratory air flow is completely or partially blocked and there is audible turbulence (air turbulence). Consonants are inhibitor overcoming sounds. In particular, consonants within the meaning of the invention are not limited to the consonant letters (B, C, D, F, etc.).
  • fricatives can be recognized by means of the sound-detector device.
  • lookup table is then advantageous for each fricative deposited a specific output code.
  • the output codes are such that certain spectral components present in a sound or consonant are no longer present in the associated output code.
  • the spectrum of an output code is also "narrower" than the spectrum of the corresponding consonant. There is thus a kind of frequency compression for the consonants.
  • the output codes are adapted to the individual hearing loss of a user.
  • each output code there are signal components in a frequency range that the user supplied with the hearing aid device can still perceive well.
  • the invention offers the advantage that, unlike ordinary frequency compression, the clarity of speech is not compromised to any extent.
  • FIG. 1 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 illustrated by the example of a behind-the-ear hearing aid 1.
  • a hearing aid housing 2 for carrying behind the ear two microphones 3 and 4 are installed for receiving the sound from the environment.
  • a signal processing unit 5 which is also integrated into the hearing aid housing 2, processes the microphone signals and amplifies them.
  • the output signal of the signal processing unit 5 is transmitted to a loudspeaker or receiver 6, which outputs an acoustic signal. If necessary, the sound is transmitted to the eardrum of the hearing aid wearer via a sound tube, which is fixed in the auditory canal with an earmold.
  • the power supply of the hearing device and in particular of the signal processing unit 5 is effected by a likewise integrated into the hearing aid housing 2 battery. 7
  • FIG. 2 shows in a simplified block diagram how an output signal is determined from an electrical input signal ES which contains a speech signal.
  • the electrical input signal ES for example a microphone signal or a signal emerging from a microphone signal after a signal processing, first of all a sound detector device KD for recognizing sounds, in particular consonants or fricatives supplied in the speech signal. This extracts in a known manner in the speech signal contained sounds and generates a corresponding Konsonantensignal KS. Subsequently, the consonant signal KS is fed to a look-up table LT, in each of which a specific output code AK is stored for different sounds or consonants contained in the consonant signal KS.
  • the specific sounds or consonants associated output code AK can be advantageously determined by programming the lookup table.
  • the lookup table can be written or changed by means of an input signal IS.
  • the output codes AK in the look-up table are chosen so that the resulting acoustic output signals from a user with an individual hearing loss are well perceived.
  • a determined output code AK is finally supplied to a coding device KE, which replaces the detectable in the input signal and detectable sounds or consonants in the resulting electrical output signal AS respectively by the associated output code AK.
  • the resulting output signal AS is finally - if necessary after further signal processing - converted by the hearing aid in question in an acoustic output signal and delivered.
  • IFFT inverse FFT
  • FIG. 3 explains the procedure described for recoding again using the waveforms.
  • This is first the spectrum S1 of an electrical input signal resulting from an acoustic input signal at a certain time.
  • the sound detector device recognizes the consonant "s" in this signal.
  • the look-up table LT contains the output code which can be seen from the spectrum S2.
  • the spectrum S2 is - to compensate for the individual hearing loss of a particular user - compared to the spectrum S1 shifted to lower frequencies.
  • the time signal associated with the spectrum S2 replaces the time signal associated with the spectrum S1 so that the consonant in question becomes perceptible to the user without overly distorting the original acoustic input signal.
  • the amplitude of the output code AK is adapted to the acoustic input signal with the speech signal contained therein such that an acoustic output signal resulting from the original speech signal with the sounds or consonants contained therein and an acoustic output signal in which certain sounds or consonants according to the Invention are replaced by output codes AK, at least have substantially the same sound energy and thus the loudness impression at least substantially remains the same.

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  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Circuit For Audible Band Transducer (AREA)
EP12159050A 2011-03-31 2012-03-12 Procédé d'amélioration de l'intelligibilité de la parole avec un appareil auditif ainsi qu'appareil auditif Withdrawn EP2506255A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011006515A DE102011006515A1 (de) 2011-03-31 2011-03-31 Verfahren zur Verbesserung der Sprachverständlichkeit mit einem Hörhilfegerät sowie Hörhilfegerät

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EP2506255A1 true EP2506255A1 (fr) 2012-10-03

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EP12159050A Withdrawn EP2506255A1 (fr) 2011-03-31 2012-03-12 Procédé d'amélioration de l'intelligibilité de la parole avec un appareil auditif ainsi qu'appareil auditif

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US (1) US20120250918A1 (fr)
EP (1) EP2506255A1 (fr)
DE (1) DE102011006515A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017200320A1 (de) * 2017-01-11 2018-07-12 Sivantos Pte. Ltd. Verfahren zur Frequenzverzerrung eines Audiosignals

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69105154T2 (de) 1990-02-13 1995-03-23 Matsushita Electric Ind Co Ltd Sprachsignalverarbeitungsvorrichtung.
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
WO2007019307A2 (fr) * 2005-08-03 2007-02-15 Somatic Technologies, Inc. Systeme de communication somatique, auditif et cochleaire, et procede correspondant
US20090112594A1 (en) 2007-10-31 2009-04-30 At&T Labs System and method of using acoustic models for automatic speech recognition which distinguish pre- and post-vocalic consonants
US20110004468A1 (en) 2009-01-29 2011-01-06 Kazue Fusakawa Hearing aid and hearing-aid processing method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69105154T2 (de) 1990-02-13 1995-03-23 Matsushita Electric Ind Co Ltd Sprachsignalverarbeitungsvorrichtung.
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
WO2007019307A2 (fr) * 2005-08-03 2007-02-15 Somatic Technologies, Inc. Systeme de communication somatique, auditif et cochleaire, et procede correspondant
US20090112594A1 (en) 2007-10-31 2009-04-30 At&T Labs System and method of using acoustic models for automatic speech recognition which distinguish pre- and post-vocalic consonants
US20110004468A1 (en) 2009-01-29 2011-01-06 Kazue Fusakawa Hearing aid and hearing-aid processing method

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DE102011006515A1 (de) 2012-10-04
US20120250918A1 (en) 2012-10-04

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