05. April 2019

10.30 Uhr,
Seminarraum, Wohllebengasse 12-14 / Erdgeschoß

Effects of the interaural stimulation-timing mismatch on localization performance of bimodal CI/HA users - Stefan Zirn

In bimodal cochlear implant (CI) / hearing aid (HA) users a constant interaural time delay in the order of several milliseconds occurs due to differences in signal processing of the devices. For MED-EL CI systems in combination with different HA types, we have quantified the respective device delay mismatch (Zirn et al. 2015). In the current study, we investigate the effect of the device delay mismatch in simulated and actual bimodal listeners on sound localization accuracy.

To deal with the device delay mismatch in actual bimodal listeners we designed and assembled a battery-powered, portable and programmable delay system that was given to bimodal listeners for one hour. After this acclimatization period a highly significant decrease of the rms error in the localization task was observed (mean improvement: 11%; p<.01, Wilcoxon Signed Rank Test) compared to the test without the delay system. Tests in simulated bimodal listeners revealed similar outcomes. Thus, the implementation of a programmable delay system in CI processors seems to be a promising way how to improve localization accuracy in bimodal listeners.

Upcoming Events

ARI-Guest-Talk: Optimization in the Construction of Multidimensional Wavelets

Neil Kristofer Dizon - University of Newcastle

24. July 2019

14.30 o'clock,
Seminar Room, Wohllebengasse 12-14 / Ground Floor

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ARI-Guest-Talk: Speech enhancement using deep neural beamformers

Matthias Zöhrer, TU Graz

14. August 2019

14.30 Uhr

Seminaraum, Wohllebengasse 12-14 / Erdgeschoß

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SSW10 - The 10th
ISCA Speech Synthesis Workshop

20. - 22. September 2019

Vienna, Austria