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Audiol > Volume 2(2); 2006 > Article
Audiology 2006;2(2): 160-164.
Published online: December 31, 2006.
doi: http://dx.doi.org/10.21848/audiol.2006.2.2.160
정상인의 반대측 귀 자극음이 일과성유발이음향방사에 미치는 영향
조수진1, 조소현1, 최미정2
1대불대학교 간호복지치료학부 언어치료청각학과
2대불대학교 보건대학원 청각학전공
Effects of Contralateral Stimulus on the Transient Evoked Otoacoustic Emissions in Normal Hearing
Soo-Jin Cho1, So-Hyun Cho1, Mi-Jung Choi2
1Department of Speech Pathology & Audiology, Daebul University, Yeongam, Korea
2Department of Public Health Graduate School, Daebul University, Yeongam, Korea
Correspondence  Soo-Jin Cho ,Tel: (061) 469-1482, Fax: (061) 469-1317, Email: sj2434@mail.daebul.ac.kr
Received: July 25, 2006;  Accepted: September 3, 2006.  Published online: December 31, 2006.
ABSTRACT
During measurements of transient evoked otoacoustic emission (TEOAE), acoustic stimulation of the contralateral ear reduces or suppresses TEOAE amplitude. This is thought to be due to the inhibitory control that the medial olivo-cochlear bundle (MOCB) exerts on the outer hair cell function. The purpose of this study was to investigate effects of contralateral stimulus on TEOAE. Contralateral suppression of TEOAE using four types of stimulus was measured in 30 young adults (30 ears) with normal hearing at 30, 40, 50 dBSPL. Contralateral stimuli were broad band noise (BBN), narrow band noise (NBN), amplitude modulation (AM) and frequency modulation (FM). This study showed that TEOAE suppression using contralateral noises increased orderly AM, FM, NBN and BBN at 40 and 50 dBSPL. Except for BBN, there was no significant difference between NBN, AM and FM. And as contralateral noise levels from 30 dBSPL to 50 dBSPL increase, TEOAE suppression also increased. But there was no the effect of gender. These results indicated that OAE represented a means of functional exploration of the active micro-mechanical properties of OHCs and our study was meaningful in the light of indicating amplitude fluctuation and frequency bandwidth effects in MOCB activation.
Key Words: MOCB·Efferent system·TEOAE suppression.
중심단어: 내측 와우올리브삭· 원심성 신경계· 일과성이 음향방사의 억제정도.
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