背景音楽(BGM)の生体に及ぼす影響

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概要

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• In order to clarify (1) the most suitable sound level for hearing BGM and (2) suppression of noise by BGM, I studied the influences of background music (BGM) on EEG and pulse and respiration rates. Subjects were seven health men ranging in age from 20 to 26 years. They attended to 3 experimental sessions on 3 different days. On the first day they were exposed for 1 hour to (1) BGM 50∼60 db, (2) BGM 60∼70db, and (3) BGM 70∼80db respectively. On the second day to (1) white noise 90 db, (2) white noise 90 db+BGM 70∼80 db, and (3) white noise 90 db+BGM 80∼90 db. And on the third day to (1) white noise 65 db, (2) white noise 65 db+ BGM 50∼60db, (3) white noise 60 db+BGM 60∼70 db, and (4) white noise 65 db+BGM 70∼80 db, for 30 minutes respectively. The subjects sat in an electrically shielded and sound-proof chamber which was kept at a constant temperature and humidity. EEG from left and right frontal, temporal, parietal and occipital areas were recorded monopolarly by a 12-channel electroencephalograph. The EEG was visually evaluated except that the alpha wave from the occipital area was measured. At the same time pulse and respiration rates were recorded. The results obtained are as follows: 1) The alpha wave more increased with BGM 50∼70 db than without BGM, but it decreased with BGM70∼80 db significantly. 2) In comparison between white noise 90 db and white noise 90 db+BGM 70∼80 db, the alpha wave of the examinees increased significantly in the latter. 3) In comparison between white noise 65 db and white noise 65 db+BGM 70∼80 db,the latter produced a significant increase of the alpha wave. 4) Pulse and respiration rates increased with stimuli of either white noise or BGM, but the pulse rate tended to decrease more with white noise+BGM stimuli than with mere white noise. 5) BGM seems to be effective on the human body with its proper use.

• 社団法人日本産業衛生学会の論文
• 1968-09-20

著者

• 斉藤 和雄

  北海道大学医学部衛生学教室

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