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Temporal jitter produces PI-PB rollover in young normal-hearing listeners Miranda, Terence T.


Older listeners, even those with audiograms in the normal range, often have more difficulty than younger listeners when listening to speech in background noise. It is thought that one of the reasons for their difficulty may be due to a temporal processing deficit such as a lack of neural synchrony. The present study investigates whether temporal jitter can simulate neural asynchrony in young, normal-hearing listeners. Sixteen young normal-hearing participants were tested with intact and temporally jittered NU-6 word lists in quiet at 40, 55, 65, and (UCL-5) dBHL. Results show significant PI-PB rollover in the jittered but not the intact condition. Results support the claim that temporal jitter simulates neural asynchrony and help explicate the neural basis for PI-PB rollover. Results are consistent with the hypothesis that synchrony coding plays a role in the perception of high-level speech.

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