Wavelet Application to Reduction of Stimulus Artifact
in Transient Evoked Otoacoustic Emissions Testing
Chai Xinyu Cheng Jingzhi Dong Hongbin Shou Yonghua Dong Mingmin
Department of BME,Xi'an Jiaotong Univerisyt, Xi'an 710049
Department of information & Detection Technology, Zhengzhou Univsity,Zhengzhou 450052
Institute of Otolaryngology, Henan Medical Univeristy, Zhengzhou 450052
Abstract Otoacoustic emissions(OAEs) are presently considered as an objective clinical test for assessing the integraity of peripheral hearing. Owing to the adding of the reflex waves of the stimuli, recordings of emissions evoked in response to transient stimuli are contaminated by an initial artifact, which inhibits the examination of high frequency cochlear responses that have short latencies. So OAEs testing is of serious limitation in most clinical environments. We propose an artifact reduction technique based on discrete wavelet transform pre-processing method and demonstrate empirically that the method not only improves artifact reduction but also enhances signal-to-noise ratio in the response region.
Key words Otoacoustic emission Signal processing Wavelet
