Suppression of DPOAE with Various Noise Bands under Contralateral
Stimulation in Normal Hearing Adults

Jang, Hyun-Kyung; Koo, Sungmin; Kim, Sungeun; Lim, Dukhwan

doi:2006.2.2.147

Audiol > Volume 2(2); 2006 > Article

Research Paper

Audiology 2006;2(2): 147-154.
Published online: December 31, 2006.
doi: http://doi.org/10.21848/audiol.2006.2.2.147

정상성인에서 대역교차소음이 DPOAE Suppression 기능에 미치는 영향

장현경¹, 구성민¹, 김성은², 임덕환³

¹한림대학교 보건대학원 청각학전공
²서울대학병원 난청검사실
³한림대학교 언어청각학부 청각학전공, 청각언어연구소

Suppression of DPOAE with Various Noise Bands under Contralateral Stimulation in Normal Hearing Adults

Hyun-Kyung Jang¹, Sungmin Koo¹, Sungeun Kim², Dukhwan Lim³

¹Graduate Program in Audiology, Hallym University, Chuncheon
²ENT, Seoul National University, Seoul
³Section of Audiology and Audiology & Speech Pathology Research Institute, Hallym University, Chuncheon, Korea

Correspondence

Dukhwan Lim ,Tel: (033) 248-2217, Fax: (02) 6280-9133, Email: dlim@hallym.ac.kr

Received: November 29, 2006; Accepted: December 20, 2006. Published online: December 31, 2006.

ABSTRACT

Distortion product otoacoustic emission (DPOAE) amplitudes and latencies were measured in response to contralateral stimuli of noises with different spectral bands to examine the effects of noise bands on efferent suppression in 26 normally hearing adults. Four types of contralateral noise stimuli were white noise, 2 kHz low pass filtered noise, 2-4 kHz band pass filtered noise, and 4 kHz high pass filtered noise. The DPOAE amplitudes were measured at the f2 range of 1.0, 1.3, 1.6, 2.0, 2.5, 3.2, 4.0, 5.0, 6.3 kHz and DPOAE latencies were measured at the f2 range of 1, 3, 6 kHz without contralateral stimulation and with contralateral stimulation of 60 dB. DPOAE amplitudes exhibited suppressive effects mainly on the mid frequency region of 1 to 2 kHz. White noise was more effective in suppressing DPOAEs than filtered noises were. The new measures of response interactions among noise bands also showed strong non-linear responses in lower frequecy range of DPOAE (1-2 kHz). In this experiment, contralateral masking did not appear to affect latencies of DPOAE since latencies of DPOAE showed no statistcally significant differences under contralateral noise stimulations (p>0.05).

Key Words: Otoacoustic emission·Olivocochlear system·Contralateral suppression.

중심단어: 이음향방사· 올리보 코클리아 시스템· 교차억제.