Abstract
We investigated the frequency similarities of tinnitus in 150 patients (186 ears) and the relationship between the ear disease and the pitch of tinnitus.
The tinnitus could be divided into three groups by the frequency similarity to pitch of tinnitus.
1) Tinnitus in 24.1% cases was limited to the low frequency ranges between 125Hz and 800Hz.
2) Tinnitus in 20.9% cases was limited to the mid-dle frequency ranges between 1KHz and 3KHz.
3) Tinnitus in 55% cases was limited to the high frequency ranges between 4KHz and 8KHz.
In an attempt of study on the relationship between the frequency similaritiy of tinnitus and the frequency of the lowest audible threshold, the following results have been obtained. Regardless to tinnitus of the low, middle or high frequency pitch, the most of cases showed the hearing inpairment in the higher frequencies on pure tone audiogram.
