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A Binaural Cochlear Implant Coding Strategy inspired by the Medial Olivocochlear Reflex: Intelligibility and Listening Effort with Moving Sources

Schulte, H (2018) A Binaural Cochlear Implant Coding Strategy inspired by the Medial Olivocochlear Reflex: Intelligibility and Listening Effort with Moving Sources. Research Project 2 (major thesis), Behavioural and Cognitive Neurosciences.

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Abstract

It has been demonstrated that advanced binaural signal processing strategies inspired by the medial olivocochlear reflex have the potential to improve speech reception for cochlear implant users [Lopez-Poveda, Eustaquio-Martín, Stohl, Wolford, Schatzer, and Wilson (2016). Ear Hear. 37, e138–e148]. Here, we evaluate the performance of several alternative implementations of the novel processing strategies for moving sound stimuli using word triplets in a vocoder simulation. In addition, we look at listening effort using the single-task oral response time. We found that, in the tested scenarios, performance with the advanced processing strategies was similar as for a ‘standard’ processing strategy involving two independently functioning cochlear implants. Indeed, performance was slightly worse for one of the novel strategies than for the standard strategy. Further tests are needed to explain these results. Response times were reliably affected by the signal-to-noise ratio and the inter-stimulus interval (rapidness of presentation), but were approximately equal for all processing strategies. Assuming that response times reflect listening effort, this suggests that listening with the more advanced strategies requires similar effort as listening with the standard strategies.

Item Type: Thesis (Research Project 2 (major thesis))
Supervisor:
Supervisor nameSupervisor E mail
Sarampalis, A.A.Sarampalis@rug.nl
Supervisor (outside RUG):
Supervisor outside RUG nameSupervisor outside RUG E mail
Lopez-Poveda, Enrique A.UNSPECIFIED
Degree programme: Behavioural and Cognitive Neurosciences
Thesis type: Research Project 2 (major thesis)
Language: English
Date Deposited: 10 Dec 2018
Last Modified: 18 Dec 2018 15:16
URI: http://fse.studenttheses.ub.rug.nl/id/eprint/18919

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