Abstract
The existence of tinnitus after the recovery of acute hearing loss may reflect minimal damage of the cochlea. TEOAEs to click stimuli were recorded in 123 ears, including 86 intact ears, 31 hearing improved sudden deafness, and 6 acoustic trauma ears with or without tinnitus. The mean detection threshold of TEOAEs was 37.5 dB nHL for the hearing improved 22 ears with tinnitus and this was statistically higher than the mean of 33.3 dB nHL for the other 15 ears without tinnitus. There was no difference between 31.8 dB nHL for 86 intact ears and 33.3 dB nHL for the improved ears without tinnitus. Thus, tinnitus indicates residual damage of TEOAE generators in the cochlea. We conclude that the tinnitus originated from the cochlea, reflecting their minimal damage is greatly related to TEOAEs.
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