무음향 방음실의 정상청력 이명자에 관한 자발이음향방사
Published Online: May 31, 2020
Abstract
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;
SOAEs were recorded in 83.3% of the 24 subjects, 56.3% of 48 ears tested. It showed no difference between the incidence of bilateral type and those of unilateral type.
The frequency range is between 580Hz and 6040Hz, and the average of frequency is approximately 2100Hz.
-
Single emission is present in 15persons and maximal peak number was 5. The average number of SOAEs per ear was 1.7.
It remains to be understood whether spontaneous emissions reflect normal auditory mechanics or some preclinical sensorineural abnormality.