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pp.849-853
Published Date 1961/10/20
DOI https://doi.org/10.11477/mf.1492202751

 The author discussed the relation between the audiometry and the soundprotecting ability of the room which is generally called as "sound proof room", and the author's opinion about the method of evaluating the "sound proof room" as a room for the hearing test and the standerdization of the hearing test room were stated.

 In conclusion, following values were suggected as the adequate sound protecting effect for the "sound proof room" to carry out the ordinally hearing test safely. That is :

 30db for 125cps, 35db for 250cps, 45db for 500cps, 45db for 1000cps, 45db for 2000cps, 40db for 4000cps, and 20db for 8000cps.


Copyright © 1961, 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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