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New Consideration and Techniques in Aircraft Noise Abatement

Canadian Acoustical Association / Association canadienne d'acoustique
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TRANSPORTATION AND AIRPORT NOISE BRUIT DE TRANSPORT ET DES AEROPORTS Jon M. Woodward Director - Environmental Services Landrum & Brown 11279 Cornell Park Drive Cincinnati, Ohio 45242 or 2831 Gill Avenue Lawrence, Kansas 66047 NEW CONSIDERATIONS AND TECHNIQUES IN AIRCRAFT NOISE ABATEMENT During the last six years, planning for the abatement and mitigation of aircraft noise has changed significantly. A large portion of this change has been brought about by the failure of well-intentioned early plans to meet the general noise reduction goals anticipated by both planners and neighboring communities. Early federally-funded attempts to establish noise compatibility programs at airports within the United States (as well as in many other countries) consisted, in many cases, of a menu of broadly defined measures affecting large groups of airport neighbors. Local disputes over project priorities, inadequacy o f project funding to maintain hoped- for schedules, and changes of public perceptions as to what constitutes an “objectionable” noise level have frequently combined to result in less than expected levels of success. The benefits o f time and experience have led many airports to reevaluate their current programs. Sponsors have often broadened, eliminated or refined ongoing mitigation measures to better respond to the realities of implementation. The boundaries of areas eligible for mitigation programs such as acquisition or sound insulation have often been based on average noise levels grounded in imprecise estimates of future aircraft operational characteristics. Use of new and refined data acquisition and dissemination techniques such as Airport Noise and Operations Monitoring Systems, GIS land use tracking, and internet home pages are being coupled with better assessments of aircraft flight characteristics and more definitive applications of local surface conditions to result in more definitive mitigation than previously available. While the

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