HABITUATION OF SLEEP TO A SHIP'S NOISE AS DETERMINED BY ACTIGRAPHY AND A SLEEP QUESTIONNAIRE

✍ Scribed by Y. TAMURA; T. HORIYASU; Y. SANO; K. CHONAN; T. KAWADA; Y. SASAZAWA; M. KUROIWA; S. SUZUKI

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 92 KB
• Volume: 250
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.2001.3900

✦ Synopsis

Habituation of sleep to a ship's noise was assessed by actigraphy and a sleep questionnaire. Four male students aged 21}24 years were studied for 15 consecutive nights in an experimental bedroom. During the "rst four nights, the subjects slept in a quiet environment. For the next eight consecutive nights, the subjects were exposed to the noise of a ship' s engine with a sound level of 60 dB(A) (the International Maritime Organization Standard) previously tape-recorded in a room of a diesel engine ship. On the last three experimental nights, the subjects again slept in a quiet environment. The subjects went to bed in the experimental room at about 0:00 and were woken at 8:00 a.m. the next morning by an alarm clock. Sleep was monitored by a wrist-worn actigraphy. On the morning following each experimental night, the subjects were instructed to answer the OSA questionnaire, a structured self-rating sleep scale developed in Japan. Habituation of sleep to the noise of a ship with a sound level of 60 dB(A) was observed to some extent in the subjective sleep parameters but not in the sleep parameters measured by actigraphy.