TY - CHAP U1 - Konferenzveröffentlichung A1 - Zirn, Stefan A1 - Arndt, Susan A1 - Wesarg, Thomas T1 - Coding of interaural phase differences in BiCI users T2 - Proceedings of the International Symposium on Auditory and Audiological Research N2 - The ability to detect a signal masked by noise is improved in normal-hearing (NH) listeners when interaural phase differences (IPD) between the ear signals exist either in the masker or the signal. We determined the impact of different coding strategies in bilaterally implanted cochlear implant (BiCI) users with and without fine-structure coding (FSC) on masking level differences. First, binaural intelligibility level differences (BILD) were determined in NH listeners and BiCI users using their clinical speech processors. NH subjects (n=8) showed a significant mean BILD of 7.5 dB. In contrast, BiCI users (n=9) without FSC as well as with FSC revealed a barely significant mean BILD (0.4 dB respectively 0.6 dB). Second, IPD thresholds were measured in BiCI users using either their speech processors with FS4 or direct stimulation with FSC. With the latter approach, synchronized stimulation providing an interaural accuracy of stimulation timing of 1.67 µs was realized on pitch matched electrode pairs. The resulting individual IPD threshold was lower in most of the subjects with direct stimulation than with their speech processors. These outcomes indicate that some BiCI users can benefit from increased temporal precision of interaural FSC and adjusted interaural frequency-place mapping presumably resulting in improved BILD. KW - Radiologie KW - Bildverarbeitung Y1 - 2016 UR - https://proceedings.isaar.eu/index.php/isaarproc/article/view/2015-40 SN - 978-87-990013-5-4 SB - 978-87-990013-5-4 VL - 5 SP - 341 EP - 348 PB - Danavox Jubilee Foundation CY - Ballerup ER -