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Sleep disturbance by road traffic noise- A laboratory study on number of noise events

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Journal of Sound and Vibration, (1990)

Аннотация

The aim of study reported here was to elucidate the importance of number of noise events with a high maximum noise level for sleep disturbance effects in terms of body movements, subjective sleep quality and performance. The noise exposure consisted of 4, 8, 16 and 64 passages from heavy vehicles. Twenty-eight subjects between 20 and 29 years of age were exposed to either 50 or 60 dB(A) maximum noise levels. The result showed that sleep quality decreased with increased number of noise events at 60 dB(A) maximum noise level. At 16 noise events/night the decrease in sleep quality was significant (−29%). At 50 dB(A) there was no relation between the number of noise events and sleep quality. The sleep quality was effected at 64 noise events, primarily by a prolonged time to fall asleep. Performance on a three-choice reaction time test (FV) was decreased after 60 dB(A) as compared to 50 dB(A). It is suggested that to protect people from sleep disturbance effects from road traffic noise, it is necessary to consider the number of vehicles of a certain maximum noise level.

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