@article{ref1,
title="Long-term effects of noise reduction measures on noise annoyance and sleep disturbance: The Norwegian facade insulation study",
journal="Journal of the Acoustical Society of America",
year="2013",
author="Amundsen, Astrid H. and Klæboe, Ronny and Aasvang, Gunn Marit",
volume="133",
number="6",
pages="3921-3928",
abstract="The Norwegian facade insulation study includes one pre-intervention and two post-intervention surveys. The facade-insulating measures reduced indoor noise levels by 7 dB on average. Before the intervention, 43% of the respondents were highly annoyed by noise. Half a year after the intervention, the proportion of respondents who were highly annoyed by road traffic noise had been significantly reduced to 15%. The second post-intervention study (2 yr after the first post-intervention study) showed that the proportion of highly annoyed respondents had not changed since the first post-intervention study. The reduction in the respondents' self-reported sleep disturbances (due to traffic noise) also remained relatively stable from the first to the second post-intervention study. In the control group, there were no statistically significant differences in annoyance between the pre-intervention and the two post-intervention studies. Previous studies of traffic changes have reported that people &quot;overreact&quot; to noise changes. This study indicated that when considering a receiver measure, such as facade insulation, the effect of reducing indoor noise levels could be predicted from exposure-response curves based on previous studies. Thus no evidence of an &quot;overreaction&quot; was found.<p /> <p>Language: en</p>",
language="en",
issn="0001-4966",
doi="10.1121/1.4802824",
url="http://dx.doi.org/10.1121/1.4802824"
}