The Fundamental Application To The New Identification And Analysis Methods For TEOAE

Otoacoustic emission (OAE) is a release of audio-frequency energy from the outer hair cells of the inner ear into the external ear canal, transmitted though the ossicular cnain and tympanum. It was first reported in 1978 by Kemp by placing a earphone-micphone probe in the ear canal. The discovery of otoacoustic emission has significant value for the basic and clinic research of auditory. OAE provides direct evidence for the cochlear active process mechanism. Therefore it breaks the traditional concepts that the cochlea as a mechanic-electronic transducer can only receive the acoustic stimulus passively, and sets up the new theory that the cochlea is a bi-directional transducer. OAE provides a new idea to research the auditory mechanism. At the same time, as an objective means to assess the cochlear functional status, otoacoustic emission has been studied largely to find out the relation between otoacoustic emission and various hearing impairments, and further establish a new diagnostic tool.Because as an objective, noninvasive and quick method transiently evoked otoacoustic emission (TEOAE) tests the transient response of the cochlea, stabilizes over a long term, can be detected in 100% normal ears, and more sensitive to injuries. TEOAE was explored earliest and has been widely used . But its reseach and application have been limited for these years. This is mainly due to the limitations of traditional analysis methods.This paper has constructed the measurement system of TEOAE, including the development of the hardware and software . In order to overcome the limitations of the traditional methods new identification and analysis methods have been set up , and applied preliminaryly. The creative work in this paper include:1. Due to the classic identification methods can not discriminate between TEOAE and stimulus artifact, we have established a new discrimination methods...