Download 13th International Conference on Cochlear Implants and Other

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Transcript
S24-19
International matrix tests as comparable tools for speech audiometry in different languages
1,2
2,3
1,2
2,4
Buschermöhle M. , Zokoll M.A. , Berg D. , Wagener K.C. , Kollmeier B.
1,2,3
1
HörTech gGmbH, Oldenburg, Germany, 2Cluster of Excellence Hearing4all, University of Oldenburg, Oldenburg, Germany, 3University of
Oldenburg, Medical Physics, Oldenburg, Germany, 4Hörzentrum Oldenburg GmbH, Oldenburg, Germany
In audiological diagnostics or when providing, fitting and assessing hearing devices such as cochlear implants, it
is necessary to determine how well a patient understands speech. This can lead to language barriers, for
example if the patient speaks a different language than the audiometrist or audiologist. Usually the speech
material is presented to the patient and the patient has to verbally repeat what he or she understood. Such
speech tests can only be conducted if the patient and the audiometrist speak the same language. It can be seen
even for normal hearing individuals that speech reception in noise is worse for non-native speakers than for
native speakers. Measuring speech reception in noise is relevant for users of any kind of hearing device because
it allows not only for assessing the amplification of a device but also for evaluating the effectiveness of noise
reduction algorithms or beamformers in realistic test situations.
The EU projects HearCom (Hearing in the communication society) and Hurdig (Network for multilingual hearing
and speech intelligibility diagnostics) worked on development, optimization and evaluation of internationally
comparable speech tests in various languages. So called Matrix Tests like the German Oldenburg Sentence
Test (OLSA) are meanwhile available in ten languages. Further language versions are being developed. Using
an adaptive procedure, Matrix Tests determine the patient's SRT in noise or in quiet. The speech material
consists of syntactically fixed but semantically unpredictable sentences (e.g., “Steven prefers three large
windows”). Sentences are generated from a limited corpus of fifty words in a seemingly random fashion. After a
training session of two measurements, the Matrix Test can be used repeatedly with the same patient since the
sentences are difficult to memorize. One measurement (i.e., one list of twenty sentences) typically takes two to
four minutes. In addition to the standard open format, the test can be performed in a closed format, making it
suitable for use with patients of a different native language than the audiometrist or audiologist, but also for
automation. This contribution provides a cross-language comparison of the available matrix tests and discusses
their application in studies as well as in everyday audiology.
477