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pp.58-61
Published Date 1951/2/20
DOI https://doi.org/10.11477/mf.1492200456

Miwa conducts examination of subjects for observ-ations upon changes that may be produced in heari-ng time, by means of Hartmann' stuning fork thro-ugh air conduction in a sound-prooled room, by me-asurement of the interval which normally exists be-tween the time the sound is made that is actually, recognized by the subject in normal hearing From resuits of this examination_the author derives the following assumption:

When the subject is placed under continuous stim-ulation of hearing a state fatigue in heating sensati-on is produced; the threshold of hearing is thereby decreased and the hearing time is also shortened. The amount of fatigue element appears to be in a direct proportion to the tuning fork time but, with tuning, C, C1, C3, and C4 that amount seems to be approximately the same.


Copyright © 1951, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 印刷版ISSN 0386-9679 医学書院

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