Nihon eiseigaku zasshi. Japanese journal of hygiene
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Nihon Eiseigaku Zasshi · Dec 1993
[Changes in the hypnograms of subjects exposed to repeated truck-passing sounds of 45, 50 and 55 dB (A)].
The effects of traffic noise on sleep were evaluated in an experimental room using recorded truck-passing sounds. Peak sound levels were 45, 50, 55 dB (A) at a frequency of one per hour. The background noise of the exposure night was Leq 32.4 dB (A). ⋯ TST, each sleep stage in minutes, % of sleep stage against TST, sleep efficiency, sleep latency, REM latency, REM cycle, REM duration, waking from sleep and the number of stage shifts of the exposure night did not significantly change compared to those of the control night. However, the sleep latency of the noise-exposed night increased significantly. Subjective sleep measured by five-factor scores and 8 items out of 29 constructing the five-factor scores of the OSA sleep inventory were decreased significantly by noise exposure, indicating deterioration of sleep quality.(ABSTRACT TRUNCATED AT 250 WORDS)