This application claims priority of German application No. 10 2008 052 176.0 filed Oct. 17, 2008, which is incorporated by reference herein in its entirety.
The invention relates to a method and a hearing device for adapting hearing device parameters.
Hearing devices are wearable hearing apparatuses which are used to assist the hard-of-hearing. In order to accommodate numerous individual requirements, various types of hearing devices are available such as behind-the-ear hearing devices, hearing devices with an external receiver and in-the-ear hearing devices, for example also concha hearing devices or completely-in-the-canal hearing devices. The hearing devices listed as examples are worn on the outer ear or in the auditory canal. Bone conduction hearing aids, implantable or vibrotactile hearing aids are also available on the market. The damaged hearing is thus stimulated either mechanically or electrically.
The key components of hearing devices are principally an input converter, an amplifier and an output converter. The input converter is normally a receiving transducer e.g. a microphone and/or an electromagnetic receiver, e.g. an induction coil. The output converter is most frequently realized as an electroacoustic converter e.g. a miniature loudspeaker, or as an electromechanical converter e.g. a bone conduction hearing aid. The amplifier is usually integrated into a signal processing unit. This basic configuration is illustrated in
Before use by the hearing device wearer, the hearing device is set by means of a hearing device acoustician in accordance with the hearing loss of the wearer. The settings are generally based on a measured audiogram, supplemented by a query relating to possible experiences with hearing devices, personal preferences or characteristics and/or specifications in respect of the special acoustic coupling. The amplifications and compressions derived therefrom are individually preset in the individual frequency bands and are if necessary finely adjusted by the hearing device acoustician. Further parameters, such as compression time constants, noise suppression, directional effect etc. can either be set automatically on the basis of questions or the age of the wearer or can be set manually by the acoustician during a consultation, or are permanently preconfigured in the hearing device. These parameters are therefore not necessarily optimally adjusted in a manner specific to the wearer.
It is the object of the invention to optimize preset hearing device parameters in a manner specific to the hearing device wearer and to specify a method and an apparatus which enable an adaptation of hearing device parameters.
In accordance with the invention, the set object is achieved by the claims.
The invention claims a method for adapting at least one hearing device parameter with a determination of a first speech intelligibility threshold, with a comparison of the determined first speech intelligibility threshold with a predefinable reference value and with an adaptation of the at least one hearing device parameter on the basis of the comparison. This is advantageous in that hearing device parameters, which were previously not individually adjusted on the basis of objective measurement data, can be adjusted by means of an objective measurement.
In one development, a first speech intelligibility threshold can be determined by a hearing device, with data being exchanged between the hearing device and an external unit, the determined first speech intelligibility threshold can be compared with a predefinable reference value stored in the hearing device and at least one hearing device parameter can be adapted on the basis of the comparison in the hearing device. As a result, the adaptation can be performed in an exclusively hearing device-controlled fashion.
In a further embodiment, the external unit can be interactively controlled by means of a hearing device user. The external unit may also be part of the hearing device. An adaptation of the hearing device parameters can only be performed by the hearing device wearer him/herself without a hearing device acoustician by controlling an external unit.
The first speech intelligibility threshold can preferably be determined with a modulated noise. This is advantageous in terms of a practical simulation.
The reference value can also take place on a statistical basis and can be permanently stored in the hearing device or the external unit.
Furthermore, the reference value can be determined as a second speech intelligibility threshold. The result can thereby be individualized more and therefore improved.
The inventive method can also include an interactive control of the external unit by means of a hearing device user when determining the reference value. A simple and reliable operator guidance is advantageous here.
In a further development of the invention, the second speech intelligibility threshold can be determined with a stationary noise. Good, individualized adaptation results can be achieved as a result.
In one development, the comparison can include a differentiation from the first speech intelligibility threshold and the reference value. This is advantageous in terms of a simple and robust comparison.
The hearing device parameters can preferably include time constants of the compression and/or time constants of the fading in/out of a noise reduction and/or omnidirectional/directional cross fading. These parameters were as a rule previously still not individualized objectively.
In a further embodiment, current speech intelligibility tests for speech in noise, such as for instance in the German language room of the Oldenburg speech intelligibility test (O1Sa), Göttingen sentence test (GöSa), or individual tones or narrow band noise signals, can be used to determine the first and/or second speech intelligibility threshold. This has the advantage of a realization based on scientific foundations.
Furthermore, a basic setting of the hearing device parameters can also be performed on the basis of an audiogram prior to determining the first and/or second speech intelligibility threshold. An optimal starting basis is created as a result for an inventive adaptation.
The invention also claims a hearing device with a control unit for implementing an inventive method. The hearing device includes a comparison unit, which compares the determined first speech intelligibility threshold with a predefinable reference value.
The invention also claims an external unit for implementing an inventive method. This has the advantage of a simple and automated operation.
The invention also claims a computer program product with a computer program, which has the software means for implementing an inventive method, if the computer program is executed in a control unit.
Further details and advantages of the invention are apparent from the descriptions which follow of several exemplary embodiments with reference to schematic drawings, in which;
Hardness of hearing is perceived by most people particularly as a result of their problems when communicating in noisy environments. To obtain a realistic measure for this hearing impairment, speech intelligibility tests in noise are implemented in the hearing diagnostics. The everyday situation can be recreated as accurately as possible by speech intelligibility tests being used in noise, in which individual words or whole sentences are shown as a useful signal. A test of this type determines the speech intelligibility threshold. The speech intelligibility threshold corresponds to 50% of the speech intelligibility, with the number of correctly understood words being counted.
The Oldenburg sentence test is known and can be successfully used for the determination of the speech intelligibility threshold for instance. The speech material is made up of 40 test lists of 20 or 30 sentences respectively. The sentences each take the form: Name Verb Numeral Adjective Object with a random combination made of an inventory of a total of 50 words. As a result, the sentences are not always useful so that the lists cannot be learned off by heart and can therefore be measured repeatedly therewith.
The first speech intelligibility threshold SVS1 is determined with an afore-cited sentence test, with both the spoken sentences as well as a modulated noise mSG being passed on by the hearing device. The noise mSG corresponds to a noise simulating speech, which, in the long term spectrum, corresponds to that of the sentence material. The first speech intelligibility threshold SVS1 is determined by means of an adaptive controller. Here the modulated noise mSG is usually displayed in the measurement at a fixed level. The level of the speech is changed adaptively, in other words in accordance with the response of the hearing device wearer. The measurement is controlled with the aid of an external unit, for instance a remote controller, by the hearing device wearer. The correctly understood words can be detected by means of an interactive control of the external unit.
In the following step 105, the first speech intelligibility threshold SVS1 determined in step 103 is compared with a reference value RW stored in the hearing device. To this end, the difference between the first speech intelligibility threshold SVS1 and the reference value RW is formed for instance. If the difference exceeds a certain value, the hearing device wearer can “hear in the gaps” and the time constants of the compression and possibly other parameters could be adjusted.
The adjustment of the hearing device parameter HP according to the evaluation in step 105 takes place in step 106.
With the adapted hearing device parameters HP, the inventive method according to
Contrary to
In the following step 105, the first speech intelligibility threshold SVS1 determined in step 103 is compared with the second speech intelligibility threshold SVS2 determined in step 104. To this end, the difference between the first speech intelligibility threshold SVS1 and the second speech intelligibility threshold SVS2 is formed for instance. If the difference exceeds a certain value, the hearing device wearer can “hear in the gaps” and the time constants of the compression and possibly other parameters could be adjusted.
The hearing device parameters HP are adjusted in step 106.
With the adapted hearing device parameters HP, the inventive method according to
As an alternative to the use of a sentence test with spoken words in the case of the method according to
The determination of the first and second speech intelligibility threshold SVS1, SVS2 is controlled by the control unit 13. To this end, the control unit 13 can access words and/or sentences stored in a storage unit 15 or individual sequences or narrow band noise signals. The control unit 13 is also connected to a comparison unit 14, which, for instance by means of differentiation, compares the determined first speech intelligibility threshold SVS1 with the deter mined second speech intelligibility threshold SVS2. Preset hearing device parameters HP are changed from the result of the comparison.
The hearing device 1 can communicate wirelessly with an external unit 20, for instance with a remote controller, with the aid of a radio module 16, which is connected to the control unit 13. To send and receive data, the external unit 20 likewise has a radio module 24, which is connected to a control module 21. The adaptation of the hearing device parameter HP can be operated and controlled by a user by measuring the speech intelligibility thresholds SVS1, SVS2 by way of an input unit 22 and a display unit 23.
Number | Date | Country | Kind |
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10 2008 052 176.0 | Oct 2008 | DE | national |