EP1933590A1 - Method for adjusting hearing aids - Google Patents

Method for adjusting hearing aids Download PDF

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Publication number
EP1933590A1
EP1933590A1 EP07022518A EP07022518A EP1933590A1 EP 1933590 A1 EP1933590 A1 EP 1933590A1 EP 07022518 A EP07022518 A EP 07022518A EP 07022518 A EP07022518 A EP 07022518A EP 1933590 A1 EP1933590 A1 EP 1933590A1
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EP
European Patent Office
Prior art keywords
horizontal
hearing
hearing aid
sound
subjective
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EP07022518A
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German (de)
French (fr)
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EP1933590B1 (en
Inventor
Georg Dr.-Ing. Schmalfuss
Jörg Dr.-Ing. Haubold
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Geers Horakustik AG & Co KG
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Geers Horakustik AG & Co KG
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Priority to SI200730128T priority Critical patent/SI1933590T1/en
Priority to PL07022518T priority patent/PL1933590T3/en
Publication of EP1933590A1 publication Critical patent/EP1933590A1/en
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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
    • H04R25/70—Adaptation of deaf aid to hearing loss, e.g. initial electronic fitting

Definitions

  • the invention relates to a method for hearing aid fitting and to a device for carrying out a directional hearing test in the horizontal plane for use in such a method.
  • the sound source location is based on the evaluation of interaural level and transit time differences, which always occur when a sound source is outside the median plane of the head-related coordinate system. This enables humans to achieve a resolution of approx. 1 ° when determining the sound source position in the horizontal plane.
  • the significance of level differences on the one hand and differences in runtime on the other hand for the sound source location reverses with increasing frequency. In the range below 1.5 kHz, the interaural level difference hardly plays a role, since the distance between the two ears in relation to the wavelength is small.
  • dominant interaural time differences are evaluated at low frequencies. The situation is different at high frequencies. Due to the shading effect of the head or the diffraction of the sound waves at the head here, the level differences of the two ear signals for sound source location can be used.
  • the standard care of a hearing-impaired person is a bilateral supply of hearing aids.
  • the setting and optimization of the parameters of both hearing aids is in principle carried out using the same methods as in the case of only one-sided care with only one hearing aid.
  • the right-side threshold and the left-side Hearing threshold individually tested and made an adjustment of the respective hearing aid amplification parameters to the hearing threshold of the corresponding ear.
  • This object is achieved with a method for hearing aid fitting with the features of claim 1.
  • Subclaims are directed to preferred embodiments.
  • a device for carrying out a directional hearing test in the horizontal plane for use in a method according to the invention is the subject of claim 7.
  • An inventive hearing aid adaptation method is characterized by a fitting step for taking into account the directional hearing in the horizontal plane. This step is performed as part of a hearing aid fitting procedure that may otherwise include the conventional hearing aid adjustment steps.
  • the adaptation step according to the invention comprises the generation of horizontally spatial sound images which correspond to sound signals from different horizontal desired directions.
  • the sound patterns spatial in the horizontal plane become the subject, in particular one Hearing aid users, for example, in the state supplied with hearing aids for indicating the subjectively perceived horizontal direction presented, from which the sound seems to come.
  • the hearing aid user thus specifies the horizontal direction from which he thinks he perceives the sound.
  • the respective subjective horizontal hearing direction indicated in this way is compared with the corresponding desired direction.
  • hearing aid amplification factors to be changed are determined.
  • amplification factors of both hearing aids are selected as a function of the comparison result, with the respective amplification factors additionally being able to be chosen in a frequency-dependent and level-dependent manner.
  • the method makes it possible to check and correct the directional hearing in the horizontal plane. It is particularly advantageous that the directional hearing determination in the horizontal plane under free field conditions, i. under conditions of use of hearing aids, and optimization information can be derived.
  • Noise usually has a broadband spectrum without striking tonal components and usually has a uniform time structure.
  • the signal structure of the sound images which are presented to the test person in the method according to the invention have as far as possible singular tonal components in the audible frequency range.
  • short-term signal structures are selected, preferably shorter than 20 s, particularly preferably shorter than 10 s.
  • Examples of such natural sound images from the normal area of life are e.g. the sound of crickets, a hair dryer, a car horn, a traffic light, a drill, a guitar or a flute.
  • a simple possibility for generating the horizontal spatial sound images is a stereo display device.
  • Different horizontal desired directions can be achieved for example by a position-dependent attenuation of the two stereo channels.
  • the method according to the invention can be used to optimize a hearing device setting.
  • the method is carried out with the hearing device user using hearing aids, the setting of which is optimally adapted with the aid of the method according to the invention.
  • the horizontal directional hearing of the hearing device user is tested using the hearing aids.
  • the method according to the invention can also be carried out in advance of the hearing device adaptation by performing it with the hearing impaired without hearing aids. From a comparison of such a determined horizontal direction hearing with the results in a supplied state can then improve the direction hearing be documented. In another application, a difference between a one-sided and a two-sided hearing aid supply can be displayed.
  • the method according to the invention can be part of a hearing aid adaptation process in which other individual hearing defects of the hearing impaired person are also taken into account.
  • the directional hearing test in the horizontal plane described herein and the particular embodiments described may also be generally used in a horizontal listening directional listening test that is not necessarily used in a hearing aid fitting.
  • a device serves to carry out a directional hearing test in the horizontal plane, as can be used in a hearing aid adaptation method according to the invention. It has a device for reproducing in a horizontal plane spatial, preferably natural sound images that correspond to sound signals from different horizontal desired directions.
  • An input device is provided, by means of which the subjective horizontal direction from which the sound appears to come can be entered.
  • An evaluation device serves to specify and / or compare the input subjective horizontal directions and the corresponding desired directions.
  • Fig. 1 shows the preferred structure for a directional hearing test in the horizontal plane, as it is used in a method according to the invention for hearing aid fitting.
  • a hearing impaired 10 is located opposite a stereo display with speakers 12, 14.
  • an input screen 16 displays a screen 17 as shown in Fig. 2 is visible.
  • the screen 17 shows an example of two speakers 18 and input fields 20, which are provided for example in the form of touch-screen elements directly on the screen or correspond to corresponding keys on a keyboard.
  • the numbers 1 to 7 on the input fields 20 correspond to the audible horizontal sound source positions to be entered by the hearing impaired person.
  • the distance A between the walkers 12, 14 on the one hand and the distance B between the speakers 12 and 14 and the hearing impaired 10 on the other hand is e.g. each 1.5 m.
  • Fig. 1 serves the presentation of horizontal spatial natural sound images that correspond to sound signals from different target directions.
  • the stereo channels of the speakers 12, 14 are attenuated differently to simulate different horizontal sound-target directions.
  • the relationship between the virtual sound source position SP and the necessary attenuation D for the two stereo channels is in Fig. 3 shown.
  • the dashed curve 22 indicates the necessary attenuation D of the right channel in arbitrary units, here in decibels, while the solid curve 24 indicates the necessary attenuation D of the left channel in arbitrary units, here in decibels.
  • the virtual sound source position SP is given as a percentage distance, measured from the left speaker 12 relative to the total distance A of the two speakers 12, 14, respectively.
  • exemplary virtual sound source positions P1 to P7 are indicated, which can be used for a directional hearing test in the horizontal plane.
  • Fig. 4 shows, by way of example, the result of a directional hearing test carried out in the horizontal plane when carrying out the method according to the invention, as can be displayed to the executing person on a screen, for example.
  • the horizontal axis shows the virtual sound source positions P.
  • the vertical axis indicates the subjective positions from the left (1) to the right (r), which were perceived by the hearing impaired as horizontal sound source positions during the directional hearing test and indicated on the screen 17 via keypads 20.
  • Crosses indicate the ideal case in which the horizontal directions perceived by the hearing-impaired correspond to the directions actually offered.
  • the points show possible results of a directional hearing test in the horizontal plane. If several points are at a horizontal position P, this corresponds to e.g. repeatedly performing individual measurements with the virtual sound position indicated by the horizontal location, the hearing impaired not having given the same result for each measurement.
  • Fig. 5 to 7 show the sound pressure levels in decibels Sound Pressure Level (dBSPL) as a function of time t in seconds for different sound patterns.
  • Fig. 5 corresponds to the sound of a traffic light while Fig. 6 the sound of Grillenzirpen corresponds.
  • the sound pictures of the FIGS. 5 and 6 Due to their well-defined singular tonal components and short-term signal structures, they are suitable, for example, for a hearing aid adaptation process according to the invention.
  • Fig. 7 shows the example of a noise signal that is not suitable.
  • the method according to the invention makes it possible to take into account the directional hearing in the horizontal plane as follows.
  • the hearing impaired 10 will, as in Fig. 1 illustrated, a stereo playback device with speakers 12, 14 opposite. Natural sound images with as singular tonal components and short signal structures are presented to him with the help of the speakers 12 and 14. Suitable sound pictures are eg a traffic light tone (accordingly Fig. 5 ), Grillenzirpen (according to Fig. 6 ), a hair dryer, a car horn, a drill, a guitar or a flute sound.
  • a traffic light tone accordingingly Fig. 5
  • Grillenzirpen accordinging to Fig. 6
  • a hair dryer e.g. a hair dryer, a car horn, a drill, a guitar or a flute sound.
  • Different virtual horizontal sound source positions corresponding to target directions are generated by means of a different damping D of the two channels of the loudspeakers 12 and 14.
  • the virtual sound source positions P1 to P7 of the Fig. 3 by appropriate selection of the left-side damping according to the curve 24 and the right-side damping according to the curve 22 of Fig. 3 produce.
  • the virtual sound source position P6 is set by setting a right side attenuation D of 0 and left side attenuation of -8 dB in the selected representation of FIG Fig. 3 reached (see dotted guidelines). This corresponds to a virtual sound source position SP, in which the virtual sound source position, measured as the distance from the left loudspeaker 12, corresponds to 80% of the total distance A of the loudspeakers 12 and 14.
  • the sound images are presented to the hearing impaired 10 in this way from different horizontal desired directions P1 to P7.
  • the touch screen 17 the in Fig. 2 is shown, the hearing impaired can enter on the keypads 20, from which horizontal direction the sound seems to come respectively.
  • Fig. 4 The result can be shown in a graphic, as exemplified in Fig. 4 is shown.
  • the virtual sound positions P1 to P7 are shown, which were generated by means of the stereo display device.
  • the vertical axis of the hearing impaired on the screen 17 entered perceived horizontal directions 1 to 7 are plotted.
  • the audiophiles are repeatedly presented with the sound images.
  • several measured values can be created for individual virtual sound source positions.
  • the mean value for this virtual sound source position can then be used for the hearing device setting and included in the classification explained below.
  • the result of the directional hearing test can be used to classify the directional hearing in the horizontal plane as follows, wherein the directional hearing in the example shown is subdivided into four types I to IV: Type I a) perfect location (all information is correct) b) almost perfect location (deviation around a position without directional tendency) Type II a) Tendency of shifting in one direction b) Shift in one direction (at least four judgments of seven are shifted in the same direction) c) extreme deviation in one direction Type III a) correct order from left to right, but narrowed solid angle b) narrowed solid angle with additional directional deviation Type IV a) Decay into several listening events b) unsystematic location
  • Type I the horizontal directional hearing test can be considered passed and an optimization of the hearing aids is usually not required. Should a clear shift of responses in a horizontal direction become apparent (eg type II), it is recommended to correct the gain of the hearing aid that provides a higher gain. The same applies, for example, to case b of type
  • the result of the directional listening test in the horizontal plane can be used to adjust the hearing aid parameters accordingly.
  • the adjustment can be carried out in this way so long in alternation with the directional hearing test until the horizontal direction hearing of the hearing device user is optimized when using the hearing aid and the directional hearing in the horizontal plane of a normal hearing as well as possible.

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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)
  • Electrophonic Musical Instruments (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Telephone Function (AREA)

Abstract

The method involves producing spatial horizontal acoustic pattern, which correspond to sound signals of different horizontal target directions and a test person (10) is presented for indicating the subjective horizontal direction. The indicated subjective horizontal direction is compared with the corresponding target direction. The hearing aid amplification factors are selected in dependence of the results of comparison. An independent claim is also included for the device for the execution of a direction hearing test in the horizontal plane.

Description

Die Erfindung betrifft ein Verfahren zur Hörgeräteanpassung und eine Vorrichtung zur Durchführung eines Richtungshörtests in der Horizontalebene zur Verwendung in einem solchen Verfahren.The invention relates to a method for hearing aid fitting and to a device for carrying out a directional hearing test in the horizontal plane for use in such a method.

Prinzipiell beruht die Schallquellenortung auf der Auswertung interauraler Pegel- und Laufzeitdifferenzen, die immer dann auftreten, wenn sich eine Schallquelle außerhalb der Medianebene des kopfbezogenen Koordinatensystems befindet. Dies befähigt den Menschen zu einer Auflösung von ca. 1° bei der Bestimmung der Schallquellenposition in der Horizontalebene. Der Stellenwert von Pegelunterschieden einerseits und Laufzeitunterschieden auf der anderen Seite für die Schallquellenortung kehrt sich mit steigender Frequenz um. Im Bereich unter 1.5 kHz spielt der interaurale Pegelunterschied kaum eine Rolle, da der Abstand beider Ohren im Verhältnis zur Wellenlänge gering ist. Für die Schallquellenortung werden bei tiefen Frequenzen dominierend interaurale Laufzeitdifferenzen ausgewertet. Anders stellt sich die Situation bei hohen Frequenzen dar. Durch die abschattende Wirkung des Kopfes bzw. die Beugung der Schallwellen am Kopf sind hier die Pegelunterschiede beider Ohrsignale für die Schallquellenortung nutzbar.In principle, the sound source location is based on the evaluation of interaural level and transit time differences, which always occur when a sound source is outside the median plane of the head-related coordinate system. This enables humans to achieve a resolution of approx. 1 ° when determining the sound source position in the horizontal plane. The significance of level differences on the one hand and differences in runtime on the other hand for the sound source location reverses with increasing frequency. In the range below 1.5 kHz, the interaural level difference hardly plays a role, since the distance between the two ears in relation to the wavelength is small. For sound source location, dominant interaural time differences are evaluated at low frequencies. The situation is different at high frequencies. Due to the shading effect of the head or the diffraction of the sound waves at the head here, the level differences of the two ear signals for sound source location can be used.

Die Regelversorgung eines hörgeschädigten Menschen ist eine beidseitige Versorgung mit Hörgeräten. Bei bekannten Hörgeräteanpassungsprozeduren wird dabei die Einstellung und Optimierung der Parameter beider Hörgeräte grundsätzlich mit den gleichen Methoden durchgeführt wie bei einer nur einseitigen Versorgung mit nur einem Hörgerät. Dazu werden bei bekannten Methoden die rechtsseitige Hörschwelle und die linksseitige Hörschwelle individuell geprüft und eine Anpassung der jeweiligen Hörgeräteverstärkungsparameter an die Hörschwelle des entsprechenden Ohres vorgenommen.The standard care of a hearing-impaired person is a bilateral supply of hearing aids. In known hearing aid fitting procedures, the setting and optimization of the parameters of both hearing aids is in principle carried out using the same methods as in the case of only one-sided care with only one hearing aid. For this purpose, in known methods, the right-side threshold and the left-side Hearing threshold individually tested and made an adjustment of the respective hearing aid amplification parameters to the hearing threshold of the corresponding ear.

Zusätzlich zu einer einseitigen Versorgung sollte das Zusammenwirken beider Hörgeräte berücksichtigt werden. Dazu ist es notwendig, u.a. den Effekt der binauralen Lautheitssummation zu berücksichtigen. Dies erfolgt bisher z.B. durch eine Verstärkungskorrektur um 3 dB im gesamten Frequenzbereich.In addition to a one-sided care, the interaction of both hearing aids should be considered. For this it is necessary u.a. to consider the effect of the binaural loudness summation. This has hitherto been done e.g. by a gain correction of 3 dB in the entire frequency range.

Es ist die Aufgabe der vorliegenden Erfindung, ein Verfahren zur Hörgeräteanpassung anzugeben, das die horizontale Richtungshörfähigkeit, insbesondere unter Freifeldbedingungen, berücksichtigt und so eine Optimierung der Hörgeräteeinstellung ermöglicht. Diese Aufgabe wird mit einem Verfahren zur Hörgeräteanpassung mit den Merkmalen des Anspruchs 1 gelöst. Unteransprüche sind auf bevorzugte Ausgestaltungen gerichtet. Eine Vorrichtung zur Durchführung eines Richtungshörtestes in der Horizontalebene zur Verwendung in einem erfindungsgemäßen Verfahren ist Gegenstand des Anspruchs 7.It is the object of the present invention to specify a method for adapting the hearing device, which takes into account the horizontal directional hearing, in particular under free-field conditions, and thus enables an optimization of the hearing device setting. This object is achieved with a method for hearing aid fitting with the features of claim 1. Subclaims are directed to preferred embodiments. A device for carrying out a directional hearing test in the horizontal plane for use in a method according to the invention is the subject of claim 7.

Ein erfindungsgemäßes Verfahren zur Hörgeräteanpassung ist gekennzeichnet durch einen Anpassschritt zur Berücksichtigung der Richtungshörfähigkeit in der horizontalen Ebene. Dieser Schritt wird im Rahmen einer Hörgeräteanpassungsprozedur durchgeführt, die ansonsten die an sich bekannten Hörgeräteanpassungsschritte umfassen kann.An inventive hearing aid adaptation method is characterized by a fitting step for taking into account the directional hearing in the horizontal plane. This step is performed as part of a hearing aid fitting procedure that may otherwise include the conventional hearing aid adjustment steps.

Der erfindungsgemäße Anpassschritt umfasst die Erzeugung von horizontal räumlichen Klangbildern, die Schallsignalen aus unterschiedlichen horizontalen Soll-Richtungen entsprechen. Die in der horizontalen Ebene räumlichen Klangbilder werden dem Probanden, also insbesondere einem Hörgerätenutzer, zum Beispiel im mit Hörgeräten versorgten Zustand zur Angabe der subjektiv empfundenen horizontalen Richtung dargeboten, aus der der Schall zu kommen scheint. Der Hörgerätenutzer gibt also diejenige horizontale Richtung an, aus der er den Schall wahrzunehmen meint.The adaptation step according to the invention comprises the generation of horizontally spatial sound images which correspond to sound signals from different horizontal desired directions. The sound patterns spatial in the horizontal plane become the subject, in particular one Hearing aid users, for example, in the state supplied with hearing aids for indicating the subjectively perceived horizontal direction presented, from which the sound seems to come. The hearing aid user thus specifies the horizontal direction from which he thinks he perceives the sound.

Die auf diese Weise angegebene jeweilige subjektive horizontale Hörrichtung wird mit der entsprechenden Soll-Richtung verglichen. In Abhängigkeit dieses Vergleichs werden zu verändernde Hörgeräteverstärkungsfaktoren bestimmt. Vorzugweise werden Verstärkungsfaktoren beider Hörgeräte in Abhängigkeit des Vergleichsergebnisses gewählt, wobei die jeweiligen Verstärkungsfaktoren zusätzlich frequenz- und pegelabhängig gewählt werden können.The respective subjective horizontal hearing direction indicated in this way is compared with the corresponding desired direction. Depending on this comparison, hearing aid amplification factors to be changed are determined. Preferably, amplification factors of both hearing aids are selected as a function of the comparison result, with the respective amplification factors additionally being able to be chosen in a frequency-dependent and level-dependent manner.

Das Verfahren ermöglicht also bei der beidseitigen Anpassung die Überprüfung und Korrektur des Richtungshörens in der Horizontalebene. Besonders vorteilhaft ist dabei, dass die Richtungshörbestimmung in der horizontalen Ebene unter Freifeldbedingungen, d.h. unter Anwendungsbedingungen von Hörgeräten, durchgeführt werden kann und Optimierungsinformationen abgeleitet werden können.Thus, in the case of the two-sided adaptation, the method makes it possible to check and correct the directional hearing in the horizontal plane. It is particularly advantageous that the directional hearing determination in the horizontal plane under free field conditions, i. under conditions of use of hearing aids, and optimization information can be derived.

Besonders vorteilhaft ist es, wenn für die horizontal räumlichen Klangbilder geeignete natürliche Klangbilder eingesetzt werden, die insbesondere ausgewählten Lebenssituationen entsprechen. Das stellt sicher, dass keine Verfälschung des Anpassungsergebnisses aufgrund von für den Probanden ungewöhnlichen Geräuschsituationen vorkommen kann.It is particularly advantageous if suitable natural sound images are used for the horizontal spatial sound images, which in particular correspond to selected life situations. This ensures that no falsification of the adaptation result due to unusual for the subject noise situations may occur.

Störgeräusche weisen meist ein breitbandiges Spektrum ohne auffallende tonale Komponenten auf und haben in der Regel eine gleichmäßige Zeitstruktur. In Anbetracht dessen erweist es sich als besonders vorteilhaft, wenn die Signalstruktur der Klangbilder, die dem Probanden bei dem erfindungsgemäßen Verfahren dargeboten werden, möglichst singuläre tonale Komponenten im hörbaren Frequenzbereich aufweisen. Außerdem ist es vorteilhaft, wenn kurzzeitige Signalstrukturen gewählt werden, bevorzugt kürzer als 20 s, besonders bevorzugt kürzer als 10 s.Noise usually has a broadband spectrum without striking tonal components and usually has a uniform time structure. In view of this, it proves to be particularly advantageous if the signal structure of the sound images which are presented to the test person in the method according to the invention have as far as possible singular tonal components in the audible frequency range. Moreover, it is advantageous if short-term signal structures are selected, preferably shorter than 20 s, particularly preferably shorter than 10 s.

Beispiele für derartige natürliche Klangbilder aus dem normalen Lebensbereich sind z.B. das Zirpen von Grillen, ein Fön, eine Autohupe, ein Ampelton, ein Bohrer, eine Gitarre oder eine Flöte.Examples of such natural sound images from the normal area of life are e.g. the sound of crickets, a hair dryer, a car horn, a traffic light, a drill, a guitar or a flute.

Eine einfache Möglichkeit zur Erzeugung der horizontal räumlichen Klangbilder stellt eine Stereowiedergabeanordnung dar. Unterschiedliche horizontale Sollrichtungen können dabei beispielsweise durch eine positionsabhängige Dämpfung der beiden Stereokanäle erreicht werden.A simple possibility for generating the horizontal spatial sound images is a stereo display device. Different horizontal desired directions can be achieved for example by a position-dependent attenuation of the two stereo channels.

Es ist bevorzugt, wenn wenigstens ein Teil der dargebotenen räumlichen Klangbilder ohne Störgeräusche gewählt wird.It is preferable if at least a part of the presented spatial sound images is selected without noises.

Das erfindungsgemäße Verfahren kann eingesetzt werden, um eine Hörgeräteeinstellung zu optimieren. Dabei wird das Verfahren mit dem Hörgerätenutzer unter Verwendung von Hörgeräten durchgeführt, deren Einstellung mit Hilfe des erfindungsgemäßen Verfahrens optimal angepasst wird.
Dabei wird also die horizontale Richtungshörfähigkeit des Hörgerätenutzers unter Verwendung der Hörgeräte getestet.The method according to the invention can be used to optimize a hearing device setting. In this case, the method is carried out with the hearing device user using hearing aids, the setting of which is optimally adapted with the aid of the method according to the invention.
Thus, the horizontal directional hearing of the hearing device user is tested using the hearing aids.

Das erfindungsgemäße Verfahren kann auch im Vorfeld der Hörgeräteanpassung durchgeführt werden, indem es mit dem Hörgeschädigten ohne Hörgeräte durchgeführt wird. Aus einem Vergleich eines derartig ermittelten horizontalen Richtungshörens mit den Ergebnissen bei einem versorgten Zustand können dann Verbesserungen der Richtungshörfähigkeit dokumentiert werden. In einem weiteren Anwendungsfall kann ein Unterschied zwischen einer einseitigen und einer beidseitigen Hörgeräteversorgung dargestellt werden.The method according to the invention can also be carried out in advance of the hearing device adaptation by performing it with the hearing impaired without hearing aids. From a comparison of such a determined horizontal direction hearing with the results in a supplied state can then improve the direction hearing be documented. In another application, a difference between a one-sided and a two-sided hearing aid supply can be displayed.

Das erfindungsgemäße Verfahren kann Teil eines Hörgeräteanpassungsprozesses sein, in dem auch andere individuelle Hörfehler des Hörgeschädigten berücksichtigt werden.The method according to the invention can be part of a hearing aid adaptation process in which other individual hearing defects of the hearing impaired person are also taken into account.

Unabhängig von dem Hörgeräteanpassungsverfahren können der in diesem Zusammenhang beschriebene erfindungsgemäße Richtungshörtest in der Horizontalebene und die geschilderten besonderen Ausgestaltungen auch allgemein im Rahmen eines Richtungshörtests in der Horizontalebene eingesetzt werden, der nicht notwendigerweise bei einer Hörgeräteanpassung verwendet wird.Regardless of the hearing aid fitting method, the directional hearing test in the horizontal plane described herein and the particular embodiments described may also be generally used in a horizontal listening directional listening test that is not necessarily used in a hearing aid fitting.

Eine erfindungsgemäße Vorrichtung dient der Durchführung eines Richtungshörtests in der Horizontalebene, wie es in einem erfindungsgemäßen Verfahren zur Hörgeräteanpassung eingesetzt werden kann. Es weist eine Einrichtung zur Wiedergabe von in einer horizontalen Ebene räumlichen, vorzugsweise natürlichen Klangbildern auf, die Schallsignalen aus unterschiedlichen horizontalen Soll-Richtungen entsprechen. Eine Eingabevorrichtung ist vorgesehen, mit deren Hilfe die subjektive horizontale Richtung, aus der der Schall zu kommen scheint, eingegeben werden kann. Eine Auswerteeinrichtung dient der Angabe und/oder dem Vergleich der eingegebenen subjektiven horizontalen Richtungen und der korrespondierenden Soll-Richtungen.A device according to the invention serves to carry out a directional hearing test in the horizontal plane, as can be used in a hearing aid adaptation method according to the invention. It has a device for reproducing in a horizontal plane spatial, preferably natural sound images that correspond to sound signals from different horizontal desired directions. An input device is provided, by means of which the subjective horizontal direction from which the sound appears to come can be entered. An evaluation device serves to specify and / or compare the input subjective horizontal directions and the corresponding desired directions.

Besondere Ausführungsformen der erfindungsgemäßen Vorrichtung sind eingerichtet, um die geschilderten vorteilhaften Ausgestaltungen des erfindungsgemäßen Verfahrens zu ermöglichen.Particular embodiments of the device according to the invention are set up to enable the described advantageous embodiments of the method according to the invention.

Die Erfindung wird anhand der beiliegenden Figuren im Detail erläutert.

Fig. 1
zeigt in schematischer Darstellung eine Vorrichtung zur Durchführung eines Richtungshörtests zur Durchführung eines erfindungsgemäßen Verfahrens zur Hörgeräteanpassung,
Fig. 2
zeigt eine Eingabebildschirmdarstellung,
Fig. 3
zeigt den Zusammenhang zwischen virtueller Schallquellenposition SP und der notwendigen Dämpfung D der beiden Stereokanäle,
Fig. 4
zeigt eine Ergebnisdarstellung eines Richtungshörtests,
Fig. 5
zeigt den zeitlichen Schalldruckpegelverlauf für einen Ampelton,
Fig. 6
zeigt den zeitlichen Schalldruckpegelverlauf für das Klangbild einer zirpenden Grille, und
Fig. 7
zeigt den zeitlichen Schalldruckpegelverlauf eines Rauschsignals.
The invention will be explained in detail with reference to the accompanying figures.
Fig. 1
1 shows a schematic representation of an apparatus for carrying out a directional hearing test for carrying out a hearing aid adaptation method according to the invention,
Fig. 2
shows an input screen display,
Fig. 3
shows the relationship between the virtual sound source position SP and the necessary attenuation D of the two stereo channels,
Fig. 4
shows a result representation of a directional hearing test,
Fig. 5
shows the temporal sound pressure level profile for a traffic light,
Fig. 6
shows the temporal sound pressure level profile for the sound image of a chirping cricket, and
Fig. 7
shows the temporal sound pressure level profile of a noise signal.

Fig. 1 zeigt den bevorzugten Aufbau für einen Richtungshörtest in der Horizontalebene, wie er bei einem erfindungsgemäßen Verfahren zur Hörgeräteanpassung eingesetzt wird. Ein Hörgeschädigter 10 befindet sich gegenüber einer Stereowiedergabeanordnung mit Lautsprechern 12, 14. Ein Eingabebildschirm 16 zeigt z.B. eine Bildschirmdarstellung 17, wie sie in Fig. 2 sichtbar ist. Die Bildschirmdarstellung 17 zeigt beispielhaft zwei Lautsprecher 18 und Eingabefelder 20, die z.B. in Form von Touch-Screen-Elementen direkt am Bildschirm vorgesehen sind oder zu entsprechenden Tasten auf einer Tastatur korrespondieren. Die Ziffern 1 bis 7 auf den Eingabefeldern 20 entsprechen den vom Hörgeschädigten einzugebenden wahrgenommenen horizontalen Schallquellenpositionen. Fig. 1 shows the preferred structure for a directional hearing test in the horizontal plane, as it is used in a method according to the invention for hearing aid fitting. A hearing impaired 10 is located opposite a stereo display with speakers 12, 14. For example, an input screen 16 displays a screen 17 as shown in Fig. 2 is visible. The screen 17 shows an example of two speakers 18 and input fields 20, which are provided for example in the form of touch-screen elements directly on the screen or correspond to corresponding keys on a keyboard. The numbers 1 to 7 on the input fields 20 correspond to the audible horizontal sound source positions to be entered by the hearing impaired person.

Der Abstand A zwischen den Laufsprechern 12, 14 einerseits und der Abstand B zwischen den Lautsprechern 12 und 14 und dem Hörgeschädigten 10 andererseits beträgt z.B. jeweils 1,5 m.The distance A between the walkers 12, 14 on the one hand and the distance B between the speakers 12 and 14 and the hearing impaired 10 on the other hand is e.g. each 1.5 m.

Die Anordnung der Fig. 1 dient der Darbietung von horizontal räumlichen natürlichen Klangbildern, die Schallsignale aus unterschiedlichen Soll-Richtungen entsprechen. Um dies zu erreichen, werden die Stereokanäle der Lautsprecher 12, 14 unterschiedlich gedämpft, um unterschiedliche horizontale Schall-Soll-Richtungen zu simulieren. Der Zusammenhang zwischen der virtuellen Schallquellenposition SP und der notwendigen Dämpfung D für die beiden Stereokanäle ist in Fig. 3 gezeigt. Die gestrichelte Kurve 22 gibt die notwendige Dämpfung D des rechten Kanals in willkürlichen Einheiten, hier in Dezibel, an, während die durchgezogene Kurve 24 die notwendige Dämpfung D des linken Kanals in willkürlichen Einheiten, hier in Dezibel, angibt. Die virtuelle Schallquellenposition SP ist als prozentueller Abstand, gemessen vom linken Lautsprecher 12 aus relativ zum Gesamtabstand A der beiden Lautsprecher 12, 14, angegeben.The arrangement of Fig. 1 serves the presentation of horizontal spatial natural sound images that correspond to sound signals from different target directions. To achieve this, the stereo channels of the speakers 12, 14 are attenuated differently to simulate different horizontal sound-target directions. The relationship between the virtual sound source position SP and the necessary attenuation D for the two stereo channels is in Fig. 3 shown. The dashed curve 22 indicates the necessary attenuation D of the right channel in arbitrary units, here in decibels, while the solid curve 24 indicates the necessary attenuation D of the left channel in arbitrary units, here in decibels. The virtual sound source position SP is given as a percentage distance, measured from the left speaker 12 relative to the total distance A of the two speakers 12, 14, respectively.

Im oberen Teil der Grafik sind beispielhaft virtuelle Schallquellenpositionen P1 bis P7 angegeben, die für einen Richtungshörtest in der Horizontalebene verwendet werden können.In the upper part of the graph, exemplary virtual sound source positions P1 to P7 are indicated, which can be used for a directional hearing test in the horizontal plane.

Fig. 4 zeigt beispielhaft das Ergebnis eines bei Ausführung des erfindungsgemäßen Verfahrens durchgeführten Richtungshörtests in der Horizontalebene, wie es dem Durchführenden z.B. an einem Bildschirm angezeigt werden kann. Die waagerechte Achse zeigt die virtuellen Schallquellenpositionen P. Die senkrechte Achse gibt die subjektiven Positionen von links (1) nach rechts (r) an, die vom Hörgeschädigten während des Richtungshörtests als horizontale Schallquellenpositionen wahrgenommen wurden und an der Bildschirmdarstellung 17 über Tastenfelder 20 angegeben wurden. Kreuze geben den Idealfall an, bei dem die vom Hörgeschädigten wahrgenommenen horizontalen Richtungen den tatsächlich auch dargebotenen Richtungen entsprechen. Fig. 4 shows, by way of example, the result of a directional hearing test carried out in the horizontal plane when carrying out the method according to the invention, as can be displayed to the executing person on a screen, for example. The horizontal axis shows the virtual sound source positions P. The vertical axis indicates the subjective positions from the left (1) to the right (r), which were perceived by the hearing impaired as horizontal sound source positions during the directional hearing test and indicated on the screen 17 via keypads 20. Crosses indicate the ideal case in which the horizontal directions perceived by the hearing-impaired correspond to the directions actually offered.

Beispielhaft zeigen die Punkte mögliche Ergebnisse eines Richtungshörtests in der Horizontalebene. Befinden sich mehrere Punkte bei einer horizontalen Position P, entspricht dies z.B. einer wiederholten Durchführung einzelner Messungen mit der durch den horizontalen Ort angegebenen virtuellen Schallposition, wobei der Hörgeschädigte nicht bei jeder Messung dasselbe Ergebnis angegeben hat.By way of example, the points show possible results of a directional hearing test in the horizontal plane. If several points are at a horizontal position P, this corresponds to e.g. repeatedly performing individual measurements with the virtual sound position indicated by the horizontal location, the hearing impaired not having given the same result for each measurement.

Die Fig. 5 bis 7 zeigen die Schalldruckpegel in Dezibel Sound Pressure Level (dBSPL) in Abhängigkeit der Zeit t in Sekunden für unterschiedliche Klangbilder. Fig. 5 entspricht dem Klangbild eines Ampeltons, während Fig. 6 dem Klangbild von Grillenzirpen entspricht. Die Klangbilder der Fig. 5 und 6 eignen sich aufgrund ihrer wohldefinierten singulären tonalen Komponenten und kurzzeitigen Signalstrukturen z.B. für einen erfindungsgemäßen Hörgeräteanpassungsprozess. Fig. 7 zeigt das Beispiel eines Rauschsignals, das nicht geeignet ist.The Fig. 5 to 7 show the sound pressure levels in decibels Sound Pressure Level (dBSPL) as a function of time t in seconds for different sound patterns. Fig. 5 corresponds to the sound of a traffic light while Fig. 6 the sound of Grillenzirpen corresponds. The sound pictures of the FIGS. 5 and 6 Due to their well-defined singular tonal components and short-term signal structures, they are suitable, for example, for a hearing aid adaptation process according to the invention. Fig. 7 shows the example of a noise signal that is not suitable.

Das erfindungsgemäße Verfahren ermöglicht die Berücksichtigung der Richtungshörfähigkeit in der Horizontalebene wie folgt.The method according to the invention makes it possible to take into account the directional hearing in the horizontal plane as follows.

Der Hörgeschädigte 10 wird, wie in Fig. 1 dargestellt, einer Stereowiedergabeeinrichtung mit Lautsprechern 12, 14 gegenübergesetzt. Natürliche Klangbilder mit möglichst singulären tonalen Komponenten und kurzen Signalstrukturen werden ihm mit Hilfe der Lautsprecher 12 und 14 dargeboten. Geeignete Klangbilder sind z.B. ein Ampelton (entsprechend Fig. 5), Grillenzirpen (entsprechend Fig. 6), ein Fön, eine Autohupe, ein Bohrer, eine Gitarre oder ein Flötenton.The hearing impaired 10 will, as in Fig. 1 illustrated, a stereo playback device with speakers 12, 14 opposite. Natural sound images with as singular tonal components and short signal structures are presented to him with the help of the speakers 12 and 14. Suitable sound pictures are eg a traffic light tone (accordingly Fig. 5 ), Grillenzirpen (according to Fig. 6 ), a hair dryer, a car horn, a drill, a guitar or a flute sound.

Unterschiedliche virtuelle horizontale Schallquellenpositionen, die Soll-Richtungen entsprechen, werden mit Hilfe einer unterschiedlichen Dämpfung D der beiden Kanäle der Lautsprecher 12 und 14 erzeugt. So lassen sich z.B. die virtuellen Schallquellenpositionen P1 bis P7 der Fig. 3 durch entsprechende Auswahl der linksseitigen Dämpfung gemäß der Kurve 24 und der rechtsseitigen Dämpfung gemäß der Kurve 22 der Fig. 3 erzeugen. Beispielsweise wird die virtuelle Schallquellenposition P6 durch Einstellung einer rechtsseitigen Dämpfung D von 0 und der linksseitigen Dämpfung von -8 dB in der gewählten Darstellung der Fig. 3 erreicht (siehe punktierte Hilfslinien). Dies entspricht einer virtuellen Schallquellenposition SP, bei der die virtuelle Schallquellenposition gemessen als Abstand vom linken Lautsprecher 12 80 % des Gesamtabstands A der Lautsprecher 12 und 14 entspricht.Different virtual horizontal sound source positions corresponding to target directions are generated by means of a different damping D of the two channels of the loudspeakers 12 and 14. For example, the virtual sound source positions P1 to P7 of the Fig. 3 by appropriate selection of the left-side damping according to the curve 24 and the right-side damping according to the curve 22 of Fig. 3 produce. For example, the virtual sound source position P6 is set by setting a right side attenuation D of 0 and left side attenuation of -8 dB in the selected representation of FIG Fig. 3 reached (see dotted guidelines). This corresponds to a virtual sound source position SP, in which the virtual sound source position, measured as the distance from the left loudspeaker 12, corresponds to 80% of the total distance A of the loudspeakers 12 and 14.

Die Klangbilder werden dem Hörgeschädigten 10 auf diese Weise aus unterschiedlichen horizontalen Soll-Richtungen P1 bis P7 dargeboten. An dem Touch-Screen 17, der in Fig. 2 dargestellt ist, kann der Hörgeschädigte auf den Tastenfeldern 20 eingeben, aus welcher horizontalen Richtung ihm der Schall jeweils zu kommen scheint.The sound images are presented to the hearing impaired 10 in this way from different horizontal desired directions P1 to P7. On the touch screen 17, the in Fig. 2 is shown, the hearing impaired can enter on the keypads 20, from which horizontal direction the sound seems to come respectively.

Das Ergebnis kann in einer Grafik dargestellt sein, wie sie beispielhaft in Fig. 4 gezeigt ist. An der waagrechten Achse sind die virtuellen Schallpositionen P1 bis P7 angegeben, die mit Hilfe der Stereowiedergabeanordnung erzeugt wurden. An der senkrechten Achse sind die von dem Hörgeschädigten am Bildschirm 17 eingegebenen wahrgenommenen horizontalen Richtungen 1 bis 7 aufgetragen.The result can be shown in a graphic, as exemplified in Fig. 4 is shown. On the horizontal axis, the virtual sound positions P1 to P7 are shown, which were generated by means of the stereo display device. On the vertical axis of the hearing impaired on the screen 17 entered perceived horizontal directions 1 to 7 are plotted.

Dem Hörgeschädigten werden die Klangbilder wiederholt dargeboten. Auf diese Weise können bei einzelnen virtuellen Schallquellenpositionen mehrere Messwerte entstehen. Zum Beispiel hat der Hörgeschädigte bei der Darstellung in Fig. 4 bei der wiederholt dargebotenen Position P3 eines Klangbildes die Positionen 2 und 4 angegeben. Für die Hörgeräteeinstellung kann dann z.B. der Mittelwert für diese virtuelle Schallquellenposition verwendet und in die unten erläuterte Klassifikation einbezogen werden.The audiophiles are repeatedly presented with the sound images. In this way, several measured values can be created for individual virtual sound source positions. For example, the hearing impaired in the presentation in Fig. 4 in the repeatedly presented position P3 of a sound image, the positions 2 and 4 indicated. For example, the mean value for this virtual sound source position can then be used for the hearing device setting and included in the classification explained below.

Das Ergebnis des Richtungshörtests kann wie folgt zur Klassifizierung des Richtungshörvermögens in der Horizontalebene eingesetzt werden, wobei das Richtungshörvermögen in dem gezeigten Beispiel in vier Typen I bis IV untergliedert wird: Typ I a) perfekte Ortung (aller Angaben sind korrekt) b) fast perfekte Ortung (Abweichung um eine Position ohne Richtungstendenz) Typ II a) Tendenz der Verschiebung in eine Richtung b) Verschiebung in eine Richtung (mindestens vier Urteile von sieben sind in die gleiche Richtung verschoben) c) extreme Abweichung in eine Richtung Typ III a) richtige Reihenfolge von links nach rechts, aber verengter Raumwinkel b) verengter Raumwinkel mit zusätzlicher Richtungsabweichung Typ IV a) Zerfall in mehrere Hörereignisse b) unsystematische Ortung Bei einer Zuordnung zu Typ I kann der horizontale Richtungshörtest als bestanden gewertet werden und eine Optimierung der Hörgeräte ist in der Regel nicht erforderlich. Sollte eine deutliche Verschiebung der Antworten in einer horizontalen Richtung offenbar werden (z.B. Typ II), wird empfohlen, dasjenige Hörgerät in seiner Verstärkung zu korrigieren, das eine höhere Verstärkung vornimmt. Gleiches gilt z.B. für den Fall b des Typs III.The result of the directional hearing test can be used to classify the directional hearing in the horizontal plane as follows, wherein the directional hearing in the example shown is subdivided into four types I to IV: Type I a) perfect location (all information is correct) b) almost perfect location (deviation around a position without directional tendency) Type II a) Tendency of shifting in one direction b) Shift in one direction (at least four judgments of seven are shifted in the same direction) c) extreme deviation in one direction Type III a) correct order from left to right, but narrowed solid angle b) narrowed solid angle with additional directional deviation Type IV a) Decay into several listening events b) unsystematic location When assigned to type I, the horizontal directional hearing test can be considered passed and an optimization of the hearing aids is usually not required. Should a clear shift of responses in a horizontal direction become apparent (eg type II), it is recommended to correct the gain of the hearing aid that provides a higher gain. The same applies, for example, to case b of type III.

Das Ergebnis des Richtungshörtests in der Horizontalebene kann verwendet werden, um die Hörgeräteparameter entsprechend einzustellen.
Die Einstellung kann auf diese Weise so lange im Wechsel mit dem Richtungshörtest durchgeführt werden, bis die horizontale Richtungshörfähigkeit des Hörgerätenutzers bei Verwendung der Hörgeräte optimiert ist und der Richtungshörfähigkeit in der Horizontalebene eines Normalhörenden möglichst gut entspricht.The result of the directional listening test in the horizontal plane can be used to adjust the hearing aid parameters accordingly.
The adjustment can be carried out in this way so long in alternation with the directional hearing test until the horizontal direction hearing of the hearing device user is optimized when using the hearing aid and the directional hearing in the horizontal plane of a normal hearing as well as possible.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1 bis 71 to 7
wahrgenommene Schallquellenpositionenperceived sound source positions
1010
Hörgeschädigterhearing impaired
12, 1412, 14
Lautsprecherspeaker
1616
Bildschirmscreen
1717
Bildschirmdarstellungscreen display
1818
LautsprecherdarstellungSpeaker Presentation
2020
Touch-Screen-FelderTouch Screen Fields
2222
Dämpfung des rechten LautsprecherkanalsAttenuation of the right speaker channel
2424
Dämpfung des linken LautsprecherkanalsAttenuation of the left speaker channel
PP
virtuelle Schallquellenpositionvirtual sound source position
P1 bis P7P1 to P7
ausgewählte virtuelle Schallquellenpositionenselected virtual sound source positions
AA
LautsprecherabstandSpeaker distance
BB
Abstand Lautsprecher - HörgeschädigterDistance speaker - Hearing impaired
DD
Dämpfungdamping
SPSP
virtuelle Schallquellenposition in Prozentvirtual sound source position in percent
SPLSPL
Schalldruckpegel (sound pressure level)Sound pressure level
tt
Zeit in Sekundentime in seconds

Claims (7)

Verfahren zur Hörgeräteanpassung gekennzeichnet durch einen Anpassschritt zur Berücksichtigung der horizontalen Richtungshörfähigkeit, bei dem - horizontal räumliche Klangbilder erzeugt werden, die Schallsignalen aus unterschiedlichen horizontalen Soll-Richtungen entsprechen, und einem Probanden (10) zur Angabe der subjektiven horizonalen Richtung, aus der der Schall zu kommen scheint, dargeboten werden, - die jeweilig angegebene subjektive horizontale Richtung mit der entsprechenden Soll-Richtung verglichen wird und - die Hörgeräteverstärkungsfaktoren in Abhängigkeit der Vergleichsergebnisse gewählt werden. A method for hearing aid fitting characterized by a fitting step for taking into account the horizontal directional hearing, in which - Horizontal spatial sound images are generated, the sound signals from different horizontal target directions correspond, and a subject (10) for indicating the subjective horizontal direction from which the sound seems to come, are presented, - The respectively specified subjective horizontal direction is compared with the corresponding desired direction and - The hearing aid amplification factors are selected as a function of the comparison results. Verfahren zur Hörgeräteanpassung nach Anspruch 1, dadurch gekennzeichnet, dass natürliche Klangbilder eingesetzt werden.Method for hearing aid adaptation according to claim 1, characterized in that natural sound images are used. Verfahren zur Hörgeräteanpassung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass Klangbilder mit möglichst singulären tonalen Komponenten im hörbaren Frequenzbereich eingesetzt werden.A method for hearing aid adaptation according to one of claims 1 or 2, characterized in that sound images are used with possible singular tonal components in the audible frequency range. Verfahren zur Hörgeräteanpassung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass Klangbilder mit kurzen Signalstrukturen, bevorzugt kürzer als 20 Sekunden, besonders bevorzugt kürzer als 10 Sekunden, eingesetzt werden.Method for hearing aid adaptation according to one of Claims 1 to 3, characterized in that sound images with short signal structures, preferably shorter than 20 seconds, particularly preferably shorter than 10 seconds, are used. Verfahren zur Hörgeräteanpassung nach einem der'Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die horizontal räumlichen Klangbilder mit einer Stereowiedergabeanordnung (12, 14) erzeugt werden, bei der unterschiedliche horizontale Soll-Richtungen vorzugsweise durch positionsabhängige Dämpfung der Stereokanäle erreicht werden.Hearing aid adaptation method according to one of claims 1 to 4, characterized in that the horizontal spatial sound images are generated by a stereo display device (12, 14) in which different horizontal desired directions are preferably achieved by position-dependent attenuation of the stereo channels. Verfahren zur Hörgeräteanpassung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass es mit dem Probanden (10) mit Hörgeräten durchgeführt wird, insbesondere um eine Feineinstellung der Hörgeräteverstärkungsfaktoren zu ermöglichen.Method for hearing aid adaptation according to one of claims 1 to 5, characterized in that it is performed with the subject (10) with hearing aids, in particular to allow a fine adjustment of the hearing aid amplification factors. Vorrichtung zur Durchführung eines Richtungshörtests in der Horizontalebene zur Verwendung in einem Verfahren zur Hörgeräteanpassung nach einem der Ansprüche 1 bis 6, mit - einer Einrichtung (12, 14) zur Wiedergabe horizontal räumlicher Klangbilder, die Schallsignalen aus unterschiedlichen horizontalen Soll-Richtungen entsprechen, - einer Eingabeeinrichtung (16, 17) zur Eingabe einer subjektiven horizontalen Richtung, aus der der Schall zu kommen scheint, und - einer Auswerteeinrichtung zur Angabe und/oder zum Vergleich der eingegebenen subjektiven horizontalen Richtungen und der korrespondierenden Soll-Richtungen. Apparatus for performing a directional hearing test in the horizontal plane for use in a hearing aid fitting method according to any one of claims 1 to 6, comprising a device (12, 14) for reproducing horizontal spatial sound images which correspond to sound signals from different horizontal desired directions, an input device (16, 17) for inputting a subjective horizontal direction from which the sound seems to come, and - An evaluation device for indicating and / or comparing the input subjective horizontal directions and the corresponding desired directions.
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PL1933590T3 (en) 2010-03-31
EP1933590B1 (en) 2009-10-07
ATE445298T1 (en) 2009-10-15
DK1933590T3 (en) 2009-11-02
DE102006058520A1 (en) 2008-06-26
ES2332476T3 (en) 2010-02-05

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