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pp.545-548
Published Date 1955/10/20
DOI https://doi.org/10.11477/mf.1492201404

 Takeuchi attempts to find to what effect the initial intensity of which the tone of a tuning fork is endowed with upon striking, might have as an influence over the measurement of threshold hearing, quantitative measurements are made on tones produced with Hartmann's forks C2, C3, C4 and G4 by means of making use of stabilizing fork-holder, tone concentrator and phonmeter. It is found that, by C2 fork, there would be a difference of 11 db. in the results of threshold hearing when it is taken by starting at the average intensity of 50 db. as when the start be at lower level of intensity closer to that of threshold hearing. Which are also true in tests with other forks. Therefore, the author maintains that when tuning forks are used for tests calling for precision the above facts should be taken in to consideration.


Copyright © 1955, 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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