The threshold of hearing were investigated by repeated audiometries in the cases of Meniere's disease, who were treated mostly medicinally. The test subjects were 38 patients including 8 bilateral cases. Mean period for follow-up-study was over one year. Audiograms obtained in both the first and the final test and in both the most improved and the most worsened stage were compared. The results, which were confirmed statistically are as follows:
In unilateral cases, the mean value of the threshold of hearing in 8000Hz was higher than in 500Hz and the gain of improved hearing in 500Hz was 16.7dB in the best hearing stage. The difference of thresholds in 500Hz between in the best and the worst stage was 27.5dB in unilateral cases.
The threshold in 8000Hz in the worst stage was higher in bilateral cases than in unilateral.
