Aircraft noise monitoring by short-term measurement

概要

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For evaluation of aircraft fly-over noise, the yearly average noise level is required at many sites around an airfield. In the case of a military base, the operation of aircraft is usually irregular and the result of noise measurement during a short-period (one or two weeks) by itself cannot be a reliable estimate. This paper reports a procedure for estimation of the yearly average noise level at an arbitrary site around the airfield from the data of the short-term measurement by comparing with the observed results at a reference monitoring station. Most of airfields provide with monitoring installations near the runway ends and the aircraft fly-over noise is monitored all the year round. The measured noise level at an arbitrary site has a close relation to that of a nearby monitoring station, and the difference of short-term average noise levels seems to reflect that of long-term average noise levels between the two locations. The procedure for the estimation is similar to the determination of sound power levels of machinery noise sources using a reference sound source. It was examined by collected data obtained at many sites around several civil airports and military bases.
社団法人日本音響学会の論文