Abstract
In the present study, the effects of different noise combinations
on sleep were assessed in two contexts, with a single noise source
and with combined noise sources. Road traffic noise, and construction
or movie noise combined with road traffic noise were used as the
single noise source and the combined noise sources, respectively.
When the sound pressure level of road traffic noise was kept constant,
levels of the construction and movie noise were changed. Twenty participants
were followed for approximately 2 weeks, during which their sleep
was evaluated using a questionnaire, including questions on sleeping
behavior, premature awakening, and subjective responses. The results
showed that the combined noise sources including construction noise
decreased the number of participants who fell asleep within an hour
and increased the number that were awakened prematurely compared
to the effects of road traffic noise combined with movie noise. However,
similar tendencies were observed while evaluating sleep quality,
sleep disturbance, and annoyance.
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