集中維持機能(TAF)に関する研究(VI) : 変化騒音によるTAFの変動

概要

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In order to study the evaluation of noise as a mental stressor, two kinds of noise which were the same as a physical load but different as a mental stressor were prepared, one was a monotone with 4,000 c/s and 90 phon, and the other varied randomly in its tone and sound level within the range of 250∼4,000 c/s and 80∼95 phon. The latter caused a disagreeable feeling to the examinee after two hours of exposure in contrast to less mental effect with the former. The examinees were tested with TAF test, flicker test (FF), esthesiometry (Es), blocking test in continuous colour-naming (Bl) and dotcounting test (Dc). The variations of the values from the pre-exposure to the post-exposure were compared between two groups: mono-tone noise group of six examinees and variable noise group of twelve examinees. The results of the studies were as follows: 1) Exposure to the mono-tone noise of 4,000 c/s and 90 phon for two hours did not cause any change in each function test. 2) Exposure to the variable noise of 250∼4,000 c/s and 80∼95 phon for two hours resulted in significant lowering of values in the esthesiometry and TAF test, while no change of values was seen in the other tests. 3) In the TAF test, L-values dropped in all of the examinees of the variation in TAF-L clearly indicated the differences in mental effects between the two kinds of noise used in this experiment.
社団法人日本産業衛生学会の論文
1966-01-20