Effects of temporal fine structure preservation on spatial hearing in bilateral cochlear implant users

Fischer, T.; Schmid, C.; Kompis, M.; Mantokoudis, G.; Caversaccio, M.; Wimmer, W. (2021). Effects of temporal fine structure preservation on spatial hearing in bilateral cochlear implant users. Journal of the Acoustical Society of America, 150(2), pp. 673-686. AIP Publishing 10.1121/10.0005732

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Typically, the coding strategies of cochlear implant audio processors discard acoustic temporal fine structure information (TFS), which may be related to the poor perception of interaural time differences (ITDs) and the resulting reduced spatial hearing capabilities compared to normal-hearing individuals. This study aimed to investigate to what extent bilateral cochlear implant (BiCI) recipients can exploit ITD cues provided by a TFS preserving coding strategy (FS4) in a series of sound field spatial hearing tests. As a baseline, we assessed the sensitivity to ITDs and binaural beats of 12 BiCI subjects with a coding strategy disregarding fine structure (HDCIS) and the FS4 strategy. For 250 Hz pure-tone stimuli but not for broadband noise, the BiCI users had significantly improved ITD discrimination using the FS4 strategy. In the binaural beat detection task and the broadband sound localization, spatial discrimination, and tracking tasks, no significant differences between the two tested coding strategies were observed. These results suggest that ITD sensitivity did not generalize to broadband stimuli or sound field spatial hearing tests, suggesting that it would not be useful for real-world listening.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Ear, Nose and Throat Disorders (ENT)
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Hearing Research Laboratory

Graduate School:

Graduate School for Cellular and Biomedical Sciences (GCB)

UniBE Contributor:

Fischer, Tim Alois; Schmid, Christoph; Kompis, Martin; Mantokoudis, Georgios; Caversaccio, Marco and Wimmer, Wilhelm

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health

ISSN:

0001-4966

Publisher:

AIP Publishing

Language:

English

Submitter:

Wilhelm Wimmer

Date Deposited:

11 Aug 2021 11:31

Last Modified:

11 Aug 2021 11:31

Publisher DOI:

10.1121/10.0005732

BORIS DOI:

10.48350/157880

URI:

https://boris.unibe.ch/id/eprint/157880

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