A1 Refereed original research article in a scientific journal
Effect of the frequency spectrum of road traffic noise on sleep: A polysomnographic study
Authors: Myllyntausta S, Virkkala J, Salo P, Varjo J, Rekola L, Hongisto V
Publication year: 2020
Journal: Journal of the Acoustical Society of America
Journal name in source: The Journal of the Acoustical Society of America
Journal acronym: J Acoust Soc Am
Volume: 147
Issue: 4
Number of pages: 11
ISSN: 0001-4966
eISSN: 1520-8524
DOI: https://doi.org/10.1121/10.0000985(external)
Web address : https://doi.org/10.1121/10.0000985(external)
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/47007633(external)
Spectrum of sound affects noise annoyance. Spectral differences of road
traffic noise (RTN) transmitted indoors are usual because of spectrally
different sound insulation of facades. The purpose was to compare the
effect of RTN spectrum on sleep. Twenty-one volunteers slept three
nights in a sleep laboratory in three sound conditions: low-frequency
(LF) RTN, high-frequency (HF) RTN, and quiet (control). The A-weighted
equivalent levels were 37, 37, and 17 dB LAeq,8h,
respectively. The nocturnal time profiles of LF and HF were equal. Sleep
was measured with polysomnography and questionnaires. HF and LF did not
differ from each other in respect to their effects on both objective
and subjective sleep quality. The duration of deep sleep was shorter,
satisfaction with sleep lower, and subjective sleep latency higher in HF
and LF than in quiet. Contrary to subjective ratings given right after
the slept night, HF was rated as the most disturbing condition for sleep
after the whole experiment (retrospective rating). The finding suggests
the sound insulation spectrum of the facade construction might play a
role regarding the effects of RTN. More research is needed about the
effects of spectrum on sleep because the field is very little
investigated.
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