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pp.1073-1077
Published Date 1962/11/20
DOI https://doi.org/10.11477/mf.1492202963

A therapeutic agent Chondron-S was admi-nistered to the employees who were engaged in works constantly exposed to a noisy environment ; the dosage was 1 tablet a day for the period of 6 months.

The agent was effective in prevention of deafness in low and middle-tones by 21.3%: in speech hearing by 36.1%.

Its effectivity was also shown among those who were employed during a long period of duration.

There is however, a limitation to its effec-tivity under an extreme loud noises (101-110 phon).


Copyright © 1962, 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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