| 자극음의 유형이 청성지속반응에 미치는 영향 |
| 조수진1, 이정학2, 조소현1 |
1대불대학교 간호복지치료학부 언어치료청각학과
2한림대학교 의과대학 이비인후과학교실 |
| Effects of Stimulus Type on Auditory Steady-State Responses |
| Soo-Jin Cho1, Jung-Hak Lee2, So-Hyun Cho1 |
1Department of Speech Pathology & Audiology, Faculty of Nursing, Welfare & Therapy, Daebul University, Yeongam, Korea
2Department of Otolaryngology, College of Medicine, Hallym University, Chuncheon, Korea |
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Received: April 25, 2006; Accepted: May 22, 2006. Published online: June 30, 2006. |
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| ABSTRACT |
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The purpose of this study was to find out effects of stimulus type on auditory steady-state responses (ASSRs). So we evaluated
ASSR amplitudes, thresholds and differences between ASSR and pure tone thresholds according to the stimulus type for the normal hearing
group. Thirty adults (15 males；15 females) participated in this study. ASSRs were obtained using MASTER system (version
2.01) at carrier frequencies of 500, 1000, 2000, 4000 Hz with modulation frequencies 82-99 Hz and stimuli were AM (amplitude
modulation), AM2, AM/FM (mixed modulation, MM), AM2/FM tones with 30 and 50 dBHL. Results were as follows. Firstly
ASSR amplitudes increased orderly AM, AM2, AM/FM, AM2/FM tones at 30 and 50 dBHL except for 500 Hz. And ASSR amplitudes
with 50 dBHL were significantly larger than those with 30 dBHL. Secondly, ASSR thresholds and differences between ASSR
and pure tone thresholds were decreased orderly AM, AM2, AM/FM, AM2/FM tones. These data suggested that ASSR with AM/
FM or AM2/FM tone can be used more efficiently than ASSR with AM or AM2 tone. |
| Key Words:
Amplitude modulation (AM)·Auditory steady state responses (ASSRs)·Mixed modulation (MM). |
| 중심단어:
진폭변조음· 복합변조음· 청성지속반응. |
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