1994 Volume 37 Issue 2 Pages 155-161
The evoked otoacoustic emissions (EOAEs) elicited by 1500Hz tonebursts were investigated in 38 patients with acute low-tone sensorineural hearing loss (ALHL) on their first visits to our hospital.
The results obtained were as follows:
1. A good positive correlation was found between EOAE detectable threshold and pure-tone hearing level at the average of 1000 and 2000Hz, but a poor correlation was found at the average of three low tone frequencies (125, 250 and 500Hz).
2. Three were much better correlation between EOAE pseudothreshold and pure-tone hearing level in subjects who didn't visit the hospital within 2 weeks from the onset than in them who visited within 2 weeks. In other words, the function of cochlear micromechanics might continue to fluctuate in subjects who received EOAE examinations within 2 weeks.
Based upon these results, we concluded that the damaged cochlear portion existed nearly in partition appropriate to low frequencies including 125, 250 and 500Hz, and that the cochlear dysfunction within 2 weeks from the onset seemed to be reversible.
