1984 年 30 巻 5Supplement3 号 p. 993-999
Experiments were made of how normal persons express pure tone, band noise (B. N.), and white noise (W. N.), by vowel sounds and the results were compared with those obtained from patients with tinnitus. Low tone was often expressed by the vowels of u and o, and middle and high tones were by the vowel of i in healthy persons. No great difference was made by using selected words. B. N. was expressed in a quite different way from that in pure tone. Patients with sensori-neural hearing loss gave different expression from that given by normal persons. However, their vowel expression tended to be similar to that of the others. The results, the way of expression by normal persons were used for anamnesis of tinnitus patients. Conductive tinnitus occurred particularly around the sounds, u, go, and 136, and the pitch was all less than 500 Hz. In mixed tinnitus, there was considerable variation, probably depending upon how conductive and sensorineural elements participate in. Sensori-neural tinnitus was found in a whole pitch range, and mostly expressed as the sounds of i series. The patients rarely complained of tinnitus of B. N.-like sound. There was found no specificity to pitch nor to disease in tinnitus.