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Korean Journal of Otorhinolaryngology-Head and Neck Surgery 1989;32(2): 226-31. |
| Effects of Rise-Fall Time of Pure Tone Stimuli on ABR |
| Kwang Suk Kim, MD, Tae Whan Cho, MD, Jin Kyo Choi, MD, Soon Keul Hong, MD, and Chang Sup Seong, MD |
| Department of Otolaryngology, College of Medicine, Kyungpook National University, Korea |
| 청자극 순음의 Rise-Fall Time이 ABR에 미치는 영향 |
| 김광석 · 조태환 · 최진교 · 홍순걸 · 성창섭 |
| 경북대학교 의과대학 이비인후과학교실 |
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| ABSTRACT |
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To standardize the rise time of a pure tone stimulus effective for using the auditory brainstem response(ABR) as objective audiometry, the amplitude, latency and detectability of the response were measured as a effectiveness of stimulus rise time. The test was performed on 20 normal adults with 0.5-and 1-kHz tone pips at various intensity levels from 0 to 50dB HL. The results are as follows : The ABR was elicited by the early part of the stimulus, and the succeeding part had little effect in eliciting the response, if the initial part was intense enough to evoke the response, but at lower intensity levels, further succeeding parts participated in evoking the response. This effective duration of the stimulus was estimated at 2ms for 1kHz, at 4ms for 0.5kHz.
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