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Association of Auditory Steady State Responses with Perception of Temporal Modulations and Speech in Noise

*, Venugopal Manju and *, Kizhakke Kodiyath Gopika and Nambi, Pitchai Muthu Arivudai (2014) Association of Auditory Steady State Responses with Perception of Temporal Modulations and Speech in Noise. ISRN Otolaryngology, 2014. pp. 1-8.

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Abstract

Amplitude modulations in the speech convey important acoustic information for speech perception. Auditory steady state response (ASSR) is thought to be physiological correlate of amplitude modulation perception. Limited research is available exploring association between ASSR and modulation detection ability as well as speech perception. Correlation of modulation detection thresholds (MDT) and speech perception in noise with ASSR was investigated in twofold experiments. 30 normal hearing individuals and 11 normal hearing individuals within age range of 18–24 years participated in experiments 1 and 2, respectively. MDTs were measured using ASSR and behavioral method at 60Hz, 80Hz, and 120Hz modulation frequencies in the first experiment. ASSR threshold was obtained by estimating the minimum modulation depth required to elicit ASSR (ASSRMDT). There was a positive correlation between behavioral MDT and ASSR-MDT at all modulation frequencies. In the second experiment, ASSR for amplitude modulation (AM) sweeps at four different frequency ranges (30–40Hz, 40–50Hz, 50–60Hz, and 60–70Hz) was recorded. Speech recognition threshold in noise (SRTn) was estimated using staircase procedure. There was a positive correlation between amplitude of ASSR for AMsweep with frequency range of 30–40Hz and SRTn. Results of the current study suggest that ASSR provides substantial information about temporal modulation and speech perception.

Item Type: Article
Subjects: Allied Health > Mangalore Campus > Speech and Hearing
Depositing User: KMCMLR User
Date Deposited: 09 May 2014 06:53
Last Modified: 09 May 2014 06:53
URI: http://eprints.manipal.edu/id/eprint/139507

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