An ERP Study on the Combined-stimulation Advantage in Vocoder Simulations.

Abstract

Electric hearing is presently the only treatment solution for patients with profound-to-severe hearing loss. For those patients also preserving low-frequency residual hearing on the ipsilateral ear, combined electric-and-acoustic stimulation (EAS) could notably improve their speech understanding abilities relative to those aided with electric-only (E-only) hearing. Early behavioral studies have consistently shown the advantage of combined stimulation. The aim of this work was to objectively examine the advantage of combined stimulation over electric-only hearing using an oddballparadigm based event-related potential (ERP) experiment. The vowel stimulus was processed by vocoding processes simulating the E-only and EAS conditions, and the generated stimuli were presented to normal-hearing listeners in the ERP experiment. Experiment results showed that the mismatch negativity (MMN) response elicited in the combined-stimulation condition featured a smaller peak amplitude and a more delayed peak latency than that in the E-only condition. The MMN results in this work demonstrated that compared with the ERP response elicited in the E-only condition, the response in the combinedstimulation condition was much closer to that elicited by the full-spectrum stimulus, yielding neurophysiological evidence on the combined-stimulation advantage.

• Authors: Danying Xu, Lei Wang, Fei Chen
• Journal: Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference (Annu Int Conf IEEE Eng Med Biol Soc) Vol. 2018 Pg. 2442-2445 (Jul 2018) ISSN: 2694-0604 [Electronic] United States
• PMID: 30440901 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Topics

• Acoustic Stimulation
• Cochlear Implants
• Evoked Potentials
• Hearing Loss
• Humans
• Speech Perception