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Audiol > Volume 2(1); 2006 > Article
Audiology 2006;2(1): 48-51.
Published online: June 30, 2006.
doi: http://doi.org/10.21848/audiol.2006.2.1.48
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
Correspondence  Soo-Jin Cho ,Tel: (061) 469-1482, Fax: (061) 469-1317, Email: sj2434@mail.daebul.ac.kr
Received: April 25, 2006;  Accepted: May 22, 2006.  Published online: June 30, 2006.
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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