AudiometerによるWeber氏試験の検討

抄録

The author tried the weber's test through the use of audiometer on many healthy and deafened persons, finding that the results were more exact than by the tuning fork, when it was performed, at the level of the minimal audible threshold or at the adequate intensity.
Through such methods, when we consider the 0-10db hearingloss as healthy, the 38% of the healthy persons feeled the tone in the middle of their heads through the total range of all frequencies, and about the 80% at the same frequencies.
On those cases, the influence of the pneumatisation cells of the head was not easy to decide. But such factor must be also calculated in the causes of the error of the test.
The lateralisation to the deafened ear was considered to occur proportionally to the results on the healthy persons. But the author reached the conclusion, that the cause of the lateralisation might be mainly due to the mastoid process, the difference of the bone conduction precision thresholds of the both ears, through the accurate measurement.
And it was considered, that the value of the difference, which might cause it most exactly, might be more over 20db.