聴閾の変動帯(transition zone)とその測定の臨床的意味について

抄録

The author suggest a new method for the determination of the transition zone (range of fluctuation) of the pure tone threshold which fluctuate from time to time. By this method, the transition zones were deterinined in those with normal hearing and those with hearing difficulty. The conclusions were as follows (1) The transition zone in those with normal hearing was about 8 db. (2) By means of this method, not only the magnitude of fluctuation, but also the actual shapes of its fluctuation are also to be observed. (3) Accordingly, presence of the factors that disturbe the precise measurement of threshold, their grade and nature are clearly demonstrated.