Assessing Community Annoyance of Helicopter Noise (2017) / Chapter Skim
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1 This report presents the findings of a study of the annoyance of helicopter and fixed-wing aircraft noise. This study developed and tested a series of hypotheses intended to determine whether helicopter noise is more annoying than fixed-wing noise.
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2 Assessing Community Annoyance of Helicopter Noise 5. The prevalence of annoyance due to helicopter noise is appreciably influenced by nonacoustic factors; 6.
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Summary 3 Only small minorities of respondents reported noticing helicopters more than a few times a day at any of the three study sites even though the number of flights per day at one site was nearly 10 times the number of flights at the other two sites. The mean level of exposure to helicopter noise of respondents who were annoyed in any degree by it was 44 dB.
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