Assessing Community Annoyance of Helicopter Noise (2017) / Chapter Skim
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23 3.1 Introduction This chapter describes site selection and measurement methods. Section 3.2 discusses the survey site selection process.
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24 Assessing Community Annoyance of Helicopter Noise One of the primary goals of the project is to determine the relative annoyance of exposure to rotary- and fixed-wing aircraft. Residents eligible for interview would ideally be exposed to noise from both forms of aircraft, if possible.
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Site Selection and Opinion Survey Methods 25 The noise exposure levels from aircraft overflights must engender measureable annoyance prevalence rates. Both the absolute level of the exposure from single overflights and numbers of overflights are important.
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26 Assessing Community Annoyance of Helicopter Noise 3.2.3.1 Civil Airports Figures 3-1 through Figure 3-4 show published helicopter routes for Van Nuys Airport, Torrance Airport, Long Beach Airport, and Las Vegas Airport. Actual helicopter routes for Las Vegas, derived from radar tracking, are shown in Figure 3-5.
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Site Selection and Opinion Survey Methods 27 Figure 3-1. Van Nuys Airport.
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28 Assessing Community Annoyance of Helicopter Noise Figure 3-3. Long Beach Airport.
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Site Selection and Opinion Survey Methods 29 Figure 3-4. Las Vegas International Airport.
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30 Assessing Community Annoyance of Helicopter Noise Figure 3-6. Greater Washington, D.C., helicopter routes.
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Site Selection and Opinion Survey Methods 31 Figure 3-9 and Figure 3-10 show the published helicopter routes and nearby land uses in the immediate vicinity of the Manhattan and Paulus Hook helistops. Residential land uses are shaded in red.
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32 Assessing Community Annoyance of Helicopter Noise Figure 3-9. Manhattan heliport.
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Site Selection and Opinion Survey Methods 33 optimization criteria. The table shows approximate number of daily helicopter operations, along with information about the presence or absence of overflights of residential neighborhoods.
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34 Assessing Community Annoyance of Helicopter Noise could be evaluated simply by comparing dosage-effect relationships constructed with different noise metrics, or other variables, as independent (predictor) variables.
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Site Selection and Opinion Survey Methods 35 Item 1 How long have you lived at (street address)
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36 Assessing Community Annoyance of Helicopter Noise If respondent answers yes to Item 9, ask Item 9A; if any other response to Item 9, ask Item 10 next Item 9A Would you say you were slightly, moderately, very, or extremely annoyed by noise made by aircraft other than helicopters while you were at home last week? Response/Coding Categories: slightly (1)
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Site Selection and Opinion Survey Methods 37 • Variant 3: Assessment of annoyance due to secondary emissions (vibration and rattle) excited by BVI noise.
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38 Assessing Community Annoyance of Helicopter Noise enumeration of every person eligible for interview) are inappropriate for present purposes.
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Site Selection and Opinion Survey Methods 39 polygons enclosing geographic areas with reasonably homogeneous aircraft noise exposure. The selection of telephone interviewing was based on the following factors: 1.
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40 Assessing Community Annoyance of Helicopter Noise noise exposure. These curves are derived from the assumption that annoyance is most effectively predicted from the "effective" (duration-adjusted)
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Site Selection and Opinion Survey Methods 41 for samples of n = 200 and greater. The figure also shows that a point of diminishing returns in reduction in confidence interval width is reached at a sample size of about 200.
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42 Assessing Community Annoyance of Helicopter Noise The basic noise measurement instrumentation was the Larson Davis 824 precision Class 1 sound level meter. [Class 1 refers to the International Electrotechnical Commission's (2005)
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