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KMID : 0917520050120020081
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Journal of Speech Sciences
2005 Volume.12 No. 2 p.81 ~ p.88
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Auditory Evoked Skin Potential in Normal Subjects
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Heo Seung-Deok
Jung Dong-Keun
Suh Duk-Joon
Kim Gwang-Nyeon
Kim Gi-Ryon
Kang Myung-Koo
Kim Lee-Suk
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Abstract
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Electrodermal activity(EDA) is a bio-electric signal which occurs at the skin surface during the sweating. EDA reflects the activity of the sympathetic axis of the autonomic nervous system. EDA is associated with the eccrine sweat gland at the palmar and plamar surface. This study was aimed to characterize the relationship between EDA and auditory stimulus intensities. Acoustic stimulus used in this study were 500 Hz, 1 kHz, 2 kHz of narrow band noise, which were representative of speech frequencies in audible range. Stimulus intensity between 90 and 30 dB in 10 dB within dynamic range. After deriving the minimum stimulus intensity(threshold of skin potential) which elicited skin potential, and then the latency and amplitude were derived from waveform of skin potential, each latency and amplitude were compared to stimulus intensity. The waveform of skin potential were recorded stably, and the threshold of skin potential appeared nearly the hearing threshold level of the participant. The latency was decreased and the amplitude was increased according to the increase of the stimulus intensity. These results suggest that auditory evoked skin potential can be applicable to auditory assessment and audiological diagnosis tool.
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KEYWORD
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electrodermal activity, skin potential, auditory evoked skin potential
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