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Reducing the Device Delay Mismatch Can Improve Sound Localization in Bimodal Cochlear Implant/Hearing-Aid Users

  • In users of a cochlear implant (CI) together with a contralateral hearing aid (HA), so-called bimodal listeners, differences in processing latencies between digital HA and CI up to 9 ms constantly superimpose interaural time differences. In the present study, the effect of this device delay mismatch on sound localization accuracy was investigated. For this purpose, localization accuracy in theIn users of a cochlear implant (CI) together with a contralateral hearing aid (HA), so-called bimodal listeners, differences in processing latencies between digital HA and CI up to 9 ms constantly superimpose interaural time differences. In the present study, the effect of this device delay mismatch on sound localization accuracy was investigated. For this purpose, localization accuracy in the frontal horizontal plane was measured with the original and minimized device delay mismatch. The reduction was achieved by delaying the CI stimulation according to the delay of the individually worn HA. For this, a portable, programmable, battery-powered delay line based on a ring buffer running on a microcontroller was designed and assembled. After an acclimatization period to the delayed CI stimulation of 1 hr, the nine bimodal study participants showed a highly significant improvement in localization accuracy of 11.6% compared with the everyday situation without the delay line (p < .01). Concluding, delaying CI stimulation to minimize the device delay mismatch seems to be a promising method to increase sound localization accuracy in bimodal listeners.show moreshow less

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Metadaten
Author:Stefan ZirnORCiDGND, Julian Angermeier, Susan Arndt, Antje Aschendorff, Thomas Wesarg
Publisher:SAGE Publications
Year of Publication:2019
Date of first Publication:2019/04/25
Language:English
Tag:bimodal hearing; cochlear implant; hearing aid; interaural stimulation timing; sound localization
DDC classes:600 Technik, Medizin, angewandte Wissenschaften
Parent Title (English):Trends in Hearing
Volume:23
ISSN:2331-2165
First Page:1
Last Page:13
Document Type:Article (reviewed)
Institutes:Hochschule Offenburg / Bibliografie
Acces Right:Frei zugänglich
Release Date:2019/12/10
Licence (German):License LogoCreative Commons - CC BY-NC - Namensnennung - Nicht kommerziell 4.0 International
URL:https://www.researchgate.net/publication/332637275_Reducing_the_Device_Delay_Mismatch_Can_Improve_Sound_Localization_in_Bimodal_Cochlear_Implant_Hearing-Aid_Users
DOI:https://doi.org/10.1177/2331216519843876
Pubmed Id:http://www.ncbi.nlm.nih.gov/pubmed?term=31018790