Aircraft Noise: A Toolkit for Managing Community Expectations (2009) / Chapter Skim
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Pages 111-118
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From page 111... ...
As airport managers communicate with neighbors and the general public on noise issues, it is appropriate that they be acquainted with the variety of noise measurements and metrics available to respond to public comment. In discussions with the public, it is essential to use graphic representations to demonstrate the concepts of noise.
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From page 112... ...
. Applicable Noise Metric Type in United States HybridSingle EventCummulativeApplication DNL, CNELEIS/EA/Part 150 evaluations Comprehensive land use planning Noise abatement planning range distance, altitude NA, TA DNL, CNEL, LegSound insulation Lmax DNL, CNELSection 303(c)
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From page 113... ...
(155) • Comparative DNL Contours for Baseline and Alternative Conditions at Boston Logan International Airport (Boston Overflight Noise Study, Phase 1)
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From page 114... ...
Consequently it is always larger than any cumulative noise measurement of the same event that lasts longer than one second. It provides the noise analyst the ability to directly compare the acoustic energy generated by two separate events, 114 Aircraft Noise: A Toolkit for Managing Community Expectations
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From page 115... ...
The SEL of each operation would be compared to provide insight into the prospective effects of changing location on the underlying population. Further, the SEL is the preferred metric for the evaluation of sleep disturbance, making it critical to the evaluation of noise abatement measures that are directed at night operations.
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From page 116... ...
The availability of this information will allow the noise analyst to sort output data to provide the numbers of daily operations that exceed selected noise thresholds. For example, the number of flights exceed116 Aircraft Noise: A Toolkit for Managing Community Expectations
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From page 117... ...
• Example of Number of Events Above Video (prepared for ACRP 02-05 project) Time Above The Time Above metric has been available for many years, but has rarely been used as a planning tool for noise abatement or land use mitigation.
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From page 118... ...
Therefore, it may be developed to provide additional understanding of existing and potential aircraft noise patterns. 7-16 7-15 118 Aircraft Noise: A Toolkit for Managing Community Expectations
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