Assessing Temporal Modulation Sensitivity Using Electrically Evoked Auditory Steady State Responses.

In this study we evaluate the use of EASSRs as a tool for assessing temporal modulation sensitivity. Modulation sensitivity was assessed behaviourally using modulation detection thresholds (MDTs) for a 20 Hz rate. On the same stimulation sites, EASSRS were measured using sinusoidally amplitude modulated pulse trains at 4 and 40 Hz. Measurements were taken using a bipolar configuration on 12 electrode pairs over 5 participants. Results showed that EASSR amplitudes and signal-to-noise ratios (SNRs) were significantly related to the MDTs. Larger EASSRs corresponded with sites of improved modulation sensitivity. This relation was driven by across-subject variation. This result indicates that EASSRs may be used as an objective measure of site-specific temporal sensitivity for CI users.
PMID: 25746913 [PubMed - as supplied by publisher]

Source: Hearing Research - March 5, 2015 Category: Audiology Authors: Luke R, Van Deun L, Hofmann M, van Wieringen A, Wouters J Tags: Hear Res Source Type: research