Autoregressive spectrum of transient evoked otoacoustic emissions: methods and applications

The transient evoked otoacoustic emissions (TEOAEs), elicited by a transient sound, is similar to the impulse (or white noise for a random process) response of a system. It fully reveals the information of cochlea in frequency domain. The aim of present study is to apply the autoregressive (AR) spectrum analysis to TEOAEs signal in our OAEs detection system and to find a new quantitative index of cochlear status. The AR spectrum is also applied to TEOAEs with contralateral acoustic stimulation (CAS) to study the function of medial olivocochlear system. The results show clearly that the AR spectrum of TEOAEs signal can be a promising method for diagnosing the impairment of cochlea and medial olivocochlear system.