무음향 방음실의 정상청력 이명자에 관한 자발이음향방사

Otoacoustic emissions, discovered by David Kemp, are audio-frequencies that are transmitted from the cochlea to the middle ear and into the external ear canal. Spontaneous otoacoustic emissions(SOAEs) are low-level acoustic signals measured in the ear without any external acoustic stimulation，but it is not clear that SOAEs result from physio-logical mechanism or certain pathology. Authors investigated 24normal young adulthood within the 20dB HL who felt tinnitus in the anechoic chamber and then examination of SOAE was done in those people.

The results were as follows;