The role of temporal cues in voluntary stream segregation in cochlear implant listeners

Andreu Paredes Gallardo, Sara Miay Kim Madsen, Torsten Dau, Jeremy Marozeau

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Cochlear implant (CI) listeners experience difficulties in complex listening scenarios, where the auditory system is required to segregate a target signal from the competing sound sources. The present study investigated segregation abilities of CI listeners as a function of temporal cues and examined whether a two-stream percept occurs instantaneously or needs time to build up. CI users participated in a detection task where a sequence of regularly presented bursts of pulses (“B”) on a single electrode interleaved with an irregular sequence (“A”) presented on the same electrode with a different pulse rate. The pulse rate difference and the duration of the sequences were varied between trials. In half of the trials, a delay was added to the last burst of the regular A sequence and the listeners were asked to detect this delay. As the period between consecutive B bursts was jittered, time judgments between the A and B sequences did not provide a reliable cue to perform the task such that the segregation of A and B should improve performance. The results showed that performance improved with increasing rate differences and increasing sequence duration, suggesting that CI listeners can segregate sounds based on temporal cues and that this percept builds up over time.
Original languageEnglish
Title of host publicationProceedings of the International Symposium on Auditory and Audiological Research
Number of pages8
PublisherThe Danavox Jubilee Foundation
Publication date2017
ISBN (Print)978-87-990013-6-1
Publication statusPublished - 2017
EventInternational Symposium on Auditory and Audiological Research - Hotel Nyborg Strand, Nyborg, Denmark
Duration: 23 Aug 201725 Aug 2017
http://isaar.eu/

Conference

ConferenceInternational Symposium on Auditory and Audiological Research
LocationHotel Nyborg Strand
CountryDenmark
CityNyborg
Period23/08/201725/08/2017
Internet address
SeriesProceedings of the International Symposium on Auditory and Audiological Research
Volume6

Cite this

Paredes Gallardo, A., Madsen, S. M. K., Dau, T., & Marozeau, J. (2017). The role of temporal cues in voluntary stream segregation in cochlear implant listeners. In Proceedings of the International Symposium on Auditory and Audiological Research The Danavox Jubilee Foundation. Proceedings of the International Symposium on Auditory and Audiological Research, Vol.. 6
Paredes Gallardo, Andreu ; Madsen, Sara Miay Kim ; Dau, Torsten ; Marozeau, Jeremy. / The role of temporal cues in voluntary stream segregation in cochlear implant listeners. Proceedings of the International Symposium on Auditory and Audiological Research. The Danavox Jubilee Foundation, 2017. (Proceedings of the International Symposium on Auditory and Audiological Research, Vol. 6).
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title = "The role of temporal cues in voluntary stream segregation in cochlear implant listeners",
abstract = "Cochlear implant (CI) listeners experience difficulties in complex listening scenarios, where the auditory system is required to segregate a target signal from the competing sound sources. The present study investigated segregation abilities of CI listeners as a function of temporal cues and examined whether a two-stream percept occurs instantaneously or needs time to build up. CI users participated in a detection task where a sequence of regularly presented bursts of pulses (“B”) on a single electrode interleaved with an irregular sequence (“A”) presented on the same electrode with a different pulse rate. The pulse rate difference and the duration of the sequences were varied between trials. In half of the trials, a delay was added to the last burst of the regular A sequence and the listeners were asked to detect this delay. As the period between consecutive B bursts was jittered, time judgments between the A and B sequences did not provide a reliable cue to perform the task such that the segregation of A and B should improve performance. The results showed that performance improved with increasing rate differences and increasing sequence duration, suggesting that CI listeners can segregate sounds based on temporal cues and that this percept builds up over time.",
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Paredes Gallardo, A, Madsen, SMK, Dau, T & Marozeau, J 2017, The role of temporal cues in voluntary stream segregation in cochlear implant listeners. in Proceedings of the International Symposium on Auditory and Audiological Research. The Danavox Jubilee Foundation, Proceedings of the International Symposium on Auditory and Audiological Research, vol. 6, International Symposium on Auditory and Audiological Research, Nyborg, Denmark, 23/08/2017.

The role of temporal cues in voluntary stream segregation in cochlear implant listeners. / Paredes Gallardo, Andreu; Madsen, Sara Miay Kim; Dau, Torsten; Marozeau, Jeremy.

Proceedings of the International Symposium on Auditory and Audiological Research. The Danavox Jubilee Foundation, 2017. (Proceedings of the International Symposium on Auditory and Audiological Research, Vol. 6).

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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AB - Cochlear implant (CI) listeners experience difficulties in complex listening scenarios, where the auditory system is required to segregate a target signal from the competing sound sources. The present study investigated segregation abilities of CI listeners as a function of temporal cues and examined whether a two-stream percept occurs instantaneously or needs time to build up. CI users participated in a detection task where a sequence of regularly presented bursts of pulses (“B”) on a single electrode interleaved with an irregular sequence (“A”) presented on the same electrode with a different pulse rate. The pulse rate difference and the duration of the sequences were varied between trials. In half of the trials, a delay was added to the last burst of the regular A sequence and the listeners were asked to detect this delay. As the period between consecutive B bursts was jittered, time judgments between the A and B sequences did not provide a reliable cue to perform the task such that the segregation of A and B should improve performance. The results showed that performance improved with increasing rate differences and increasing sequence duration, suggesting that CI listeners can segregate sounds based on temporal cues and that this percept builds up over time.

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Paredes Gallardo A, Madsen SMK, Dau T, Marozeau J. The role of temporal cues in voluntary stream segregation in cochlear implant listeners. In Proceedings of the International Symposium on Auditory and Audiological Research. The Danavox Jubilee Foundation. 2017. (Proceedings of the International Symposium on Auditory and Audiological Research, Vol. 6).