EP1619928B1 - Prothèse auditive ou système de communication avec sources virtuelles - Google Patents

Prothèse auditive ou système de communication avec sources virtuelles Download PDF

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Publication number
EP1619928B1
EP1619928B1 EP05106213A EP05106213A EP1619928B1 EP 1619928 B1 EP1619928 B1 EP 1619928B1 EP 05106213 A EP05106213 A EP 05106213A EP 05106213 A EP05106213 A EP 05106213A EP 1619928 B1 EP1619928 B1 EP 1619928B1
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EP
European Patent Office
Prior art keywords
user
hearing aid
communication system
accordance
signal
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.)
Revoked
Application number
EP05106213A
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German (de)
English (en)
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EP1619928A1 (fr
Inventor
Ulrich Kornagel
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Sivantos GmbH
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Siemens Audioligische Technik GmbH
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Publication date
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Application filed by Siemens Audioligische Technik GmbH filed Critical Siemens Audioligische Technik GmbH
Publication of EP1619928A1 publication Critical patent/EP1619928A1/fr
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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
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/552—Binaural
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H04S1/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
    • H04S1/005—For headphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
    • H04S2400/11—Positioning of individual sound objects, e.g. moving airplane, within a sound field
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
    • H04S2420/01—Enhancing the perception of the sound image or of the spatial distribution using head related transfer functions [HRTF's] or equivalents thereof, e.g. interaural time difference [ITD] or interaural level difference [ILD]

Definitions

  • the invention relates to a hearing aid or communication system for the binaural supply of a user, wherein acoustic signals for the user's information about settings or system states of the hearing aid or communication system can be generated.
  • Hearing aid systems with two head-worn hearing aids for the binaural care of a user are known from the prior art. Furthermore, communication systems are known in which a user can be supplied with different acoustic signals for the left and the right ear via at least two loudspeakers.
  • a sound output device for a motor vehicle is known.
  • An output portion consisting of a pair of loudspeakers arranged adjacent to each other is installed inside a seat back or seat back of a designated seat.
  • the sound output surfaces of the respective speakers point to a designated person sitting on the designated seat. It is thus easy to ensure a necessary distance for achieving a clear acoustic image localization in accordance with the size of the speakers cooperatively forming the output portion.
  • a head-worn hearing aid comprising an electrical signal path between a microphone and a handset, the signal path using means for electronically setting preprogrammed transmission parameters and a switching means of the hearing aid to different listening situations / sound environments is adaptable, wherein the switching means additionally a signal output device controls, the at least one signal which is characteristic of the respective transmission parameters set for a specific listening situation / sound environment, whereby the hearing device user can perceive this signal and can be informed about the selected setting without removing the hearing device from the head.
  • a communication system in which a user is supplied with different signals, for example originating from different communication participants, in such a way that the user apparently receives the different signals from different localities with respect to the head.
  • the signal output is such that for the user signals from different virtual len signal sources from the user surrounding space are perceptible. This also makes it easier to distinguish the signals of the individual communication participants from each other.
  • HRIR Head Related Impulse Response
  • HRTF Head Related Transfer Function
  • the HRTF is a function of four variables: the three spatial coordinates (relative to the head) and the frequency.
  • measurements are usually carried out on an artificial head, eg KEMAR (Knowles Electronics Mannequin for Acoustical Research).
  • An overview of the determination of HRTFs is for example Yang, Wonyoung, "Overview of the Head-Related Transfer Functions (HRTFs)", ACS 498B Audio Engineering, The Pennsylvania State University, July 2001.
  • the object of the present invention is to make it easier for the user of a hearing aid or communication system to differentiate or assign acoustic signals to inform the user about settings or system states of the hearing aid or communication system.
  • a hearing aid or communication system for binaural care of a user, wherein acoustic signals for user information on settings or system states of the hearing aid or communication system can be generated, achieved in that the acoustic signals to the information of the user for better distinctness of the signals receive additional, perceptible by the user information by the signal output by the hearing aid or communication system is such that for the user different settings or system states associated signals of different virtual signal sources are perceptible from the space surrounding the user.
  • a hearing aid system according to the invention comprises two head-worn hearing aids for the binaural care of a user.
  • the hearing aid devices are coupled to one another in such a way that an exactly matched delivery of an acoustic signal to the left and the right ear can take place.
  • a communication system according to the invention exactly matched, but usually slightly different acoustic signals can be generated and supplied to the left and the right ear of a user.
  • the acoustic information relates to current settings of the hearing aid or communication system, such as the set volume or the currently set hearing program and certain system states, such as the current state of charge of the voltage sources used.
  • a sound could be placed spatially virtually in such a way that its spatial height symbolizes the level of the state of charge. Since this is a continuous size, a virtual acoustic scale should also be displayed. This can be done by first going through the possible range of values, i. E. So, walking from the bottom left to the top right, and in direct connection to it comes virtually from the direction that reflects the current state of charge.
  • the principle of virtual spatial representation of information can also be used for other, as yet unspecified features for hearing aid or communication systems. It can thus be used as a universal additional degree of freedom for information transfer. For example, a user in conjunction with a compass can be notified of the sky direction "North" by generating an on-demand virtual sound coming from this direction.
  • the spatial arrangement of the virtual signal source in the room is preferably carried out taking into account the so-called HRTF (head-related transfer functions) of the two ears.
  • HRTF head-related transfer functions
  • the fact is exploited that in known impulse responses of the left or right ear with respect to a sound signal emanating from a spatial point, a fictitious sound source lying at this point in space can be simulated.
  • the relevant acoustic signal is folded with the left or right HRIR (head-related impulse response). It is important here that the possibly asymmetric behavior of the hearing aid or communication devices of the hearing aid or communication systems worn on the left or right ear does not destroy the spatial impression.
  • both hearing aid or communication devices provide the acoustic signal in exact synchronism, so that the signal changes produced by the respective HRIR can also be exactly effective.
  • asynchronously operating hearing aid or communication devices may occur due to the time lag between the acoustic signal for the left and the right ear an unwanted spatial offset in the perception of the acoustic signal.
  • Prerequisite for a synchronous signal delivery is a coupling and synchronization of the two hearing aid or communication devices in which, if necessary, differences in the clock frequency of both devices must be compensated.
  • the HRTF or HRIR are preferably determined on the KEMAR, a standardized artificial head. Such measurements are usually sufficient. However, better results are achieved by individual measurements of the HRTF or HRIR at the respective user of the hearing aid or communication system.
  • FIG. 1 shows a user 2, behind the right ear wearing a hearing aid 1A and behind the left ear a hearing aid 1B.
  • the two hearing aids 1A and 1B are coupled to each other by means of a wire connection or wirelessly, so that signals generated or stored in the hearing aids 1A and 1B can be supplied to the left and the right ear in a coordinated manner.
  • the user 2 is given the impression that the signal originates from a signal source occupying a certain position in space.
  • no such signal source is actually present in the room, it is a virtual signal source.
  • the virtual signal source with respect to the straight-ahead viewing direction of the user 2 can be moved in space.
  • the change in the position of the virtual signal source in space is used to add additional information to the acoustic signal coming from the virtual signal source. This additional information can be perceived by the user 2 consciously or unconsciously.
  • the hearing programs designated by the program numbers 1 to 4 are adjustable. When switching between different hearing programs or by a specific query of the currently set hearing program is the user 2 informed about the currently set hearing program. This information can take place, for example, in the form of a voice signal.
  • the voice output of a virtual signal source which occupies different positions in space as a function of the active hearing program.
  • the hearing aid 1 is assigned the virtual signal source 3 in the lower left position with respect to the straight-ahead viewing direction of the user 2.
  • the virtual signal source is at the announcement of the hearing program 2 in the position 4 front left.
  • all signal sources are on a cone surrounding the user 2, which is rotationally symmetrical with respect to the body longitudinal axis of the user 2 in the room.
  • FIG. 2 shows a further embodiment of the invention.
  • the user 2 is supplied by two hearing aid devices 1A and 1B, which are coupled with respect to the delivery of signals generated or stored in the hearing aid system 1A, 1B.
  • FIG. 1 is in the embodiment according to FIG. 2 not the current hearing program, but the current state of charge of serving for power supply of the two hearing aids 1A and 1B voltage sources displayed.
  • a sound for indicating an empty voltage source from the left side appears to be approximately at eye level.
  • a full voltage source is by one from the right displayed above the head beep.
  • the frequency and / or the volume and / or the duration of the signal tone used can increase with increasing charge of the voltage source.
  • the hearing aid system 1A, 1B can be operated in such a way that the user 2 is presented with the possible values of charging states initially in the form of an acoustic scale. This can take place, for example, in that the signal tone runs continuously within a short time with respect to the position of the virtual signal source and the signal frequency and volume for all possible charging states and then the signal representing the current state of charge is generated again, so that the user 2 better the current state of charge in relation to the possible value range.
  • FIG. 2 illustrates possible positions 8 to 11 of the virtual signal source in the display of the state of charge of the voltage source. In order to display the current value, after the virtual scale has been displayed, the current value, to which, for example, position 10 is assigned, is generated again.
  • the phase shift and change in the volume of an acoustic signal supplied to the left and right ears are essential features to provide the user 2 with a direction from which the signal is received.
  • other influencing factors In order to cover three-dimensionally almost the entire space surrounding the user 2, however, other influencing factors must be considered. These factors relate in particular to the anatomical conditions of the head and the ears, are changed by the incoming from a certain direction sound signals before they reach the eardrum of each ear.
  • Related signal changes can be described by the so-called head-related transfer functions (HRTF).
  • HRTF head related impulse responses
  • HRIR head related impulse responses
  • the user 2 is in a measurement environment and is by means of a speaker 12, which represents the sound source, sonicated by a specific signal.
  • the acoustic signal thus supplied to the user 2 is measured in the auditory canals thereof by means of measuring sensors (not shown) installed there. From the comparison of the emitted signal with the signals measured in the auditory canals, the HRIR and HRTF can be determined for the left and the right ear.
  • the HRIR and HRTF can be determined for the left and the right ear.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Stereophonic System (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Circuits Of Receivers In General (AREA)

Claims (9)

  1. Système de communication ou de correction auditive (1A, 1B) permettant l'écoute binaurale à un utilisateur (2), dans lequel des signaux acoustiques peuvent être générés afin d'informer l'utilisateur sur des réglages ou des états du système de communication ou de correction auditive (1A, 1B), et dans lequel les signaux acoustiques destinés à informer l'utilisateur contiennent une information supplémentaire, perceptible par l'utilisateur, qui lui permet de mieux distinguer les signaux, en effectuant la délivrance des signaux par le système de communication ou de correction auditive (1A, 1B) de telle sorte que des signaux, associés à des réglages différents pour l'utilisateur (2) et provenant de sources de signal virtuelles différentes (3, 4, 5, 6 ; 8, 9, 10, 11) sont perceptibles dans l'espace (7) qui entoure l'utilisateur (2).
  2. Système de communication ou de correction auditive (1A, 1B) selon la revendication 1, dans lequel on peut définir dans l'espace au moins un secteur (7) dans lequel se trouve, pour l'utilisateur (2), la source de signal virtuelle (3 à 6 ; 8 à 11).
  3. Système de communication ou de correction auditive (1A, 1B) selon la revendication 2, dans lequel le secteur est un cône (7) à symétrie de révolution autour de l'axe longitudinal du corps de l'utilisateur (2).
  4. Système de communication ou de correction auditive (1A, 1B) selon la revendication 2 ou 3, dans lequel le secteur (7) est défini ou délimité par un certain angle d'élévation (ϕ).
  5. Système de communication ou de correction auditive (1A, 1B) selon l'une des revendications 1 à 4, dans lequel le signal acoustique peut être délivré pendant un certain temps de sorte que la position de la source de signal virtuelle (8 à 11) dans l'espace peut être modifiée pendant la délivrance du signal à l'utilisateur (2).
  6. Système de communication ou de correction auditive (1A, 1B) selon l'une des revendications 1 à 5, dans lequel la position de la source de signal virtuelle (8 à 11) dans l'espace dépend de la valeur du réglage obtenu respectivement de la valeur de l'état de système obtenu.
  7. Système de communication ou de correction auditive (1A, 1B) selon l'une des revendications 1 à 6, dans lequel une échelle virtuelle pour l'utilisateur (2) peut être produite.
  8. Système de communication ou de correction auditive (1A, 1B) selon l'une des revendications 1 à 7, dans lequel la position de la source de signal virtuelle (8 à 11) dans l'espace est combinée à d'autres propriétés du signal acoustique délivré, comme l'intensité ou la fréquence ou la durée.
  9. Système de communication ou de correction auditive (1A, 1B) selon l'une des revendications 1 à 8, dans lequel le positionnement différent de la source de signal virtuelle (3 à 4 ; 8 à 11) dans l'espace est effectué en tenant compte de ce que l'on appelle des fonctions de transfert relatives à la tête.
EP05106213A 2004-07-20 2005-07-07 Prothèse auditive ou système de communication avec sources virtuelles Revoked EP1619928B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004035046A DE102004035046A1 (de) 2004-07-20 2004-07-20 Hörhilfe-oder Kommunikationssystem mit virtuellen Signalquellen

Publications (2)

Publication Number Publication Date
EP1619928A1 EP1619928A1 (fr) 2006-01-25
EP1619928B1 true EP1619928B1 (fr) 2008-02-27

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EP05106213A Revoked EP1619928B1 (fr) 2004-07-20 2005-07-07 Prothèse auditive ou système de communication avec sources virtuelles

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US (1) US7561707B2 (fr)
EP (1) EP1619928B1 (fr)
AT (1) ATE387830T1 (fr)
DE (2) DE102004035046A1 (fr)
DK (1) DK1619928T3 (fr)

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Also Published As

Publication number Publication date
DK1619928T3 (da) 2008-06-30
ATE387830T1 (de) 2008-03-15
US7561707B2 (en) 2009-07-14
EP1619928A1 (fr) 2006-01-25
US20060018497A1 (en) 2006-01-26
DE102004035046A1 (de) 2005-07-21
DE502005002956D1 (de) 2008-04-10

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