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Preliminary Results of Noise Monitoring in 1995 in Bryce Canyon National Park Staff at Bryce Canyon National Park conducted noise monitoring surveys from 30 May to 31 August 1995 at five sites using the 15-second Leq method. Noise levels from helicopters, planes, jets, and other mechanical means, as well as natural or background noise were monitored. Aircraft were heard park-wide an average 18.8% of the time with an average of 36.4 decibels. Site-specific information is presented on peak decibel levels, average noise levels, and number of aircraft overflights. Published in Proceedings of the Third Biennial Conference of Research on the Colorado Plateau, in 1996. Categories: Publication; Types: Citation, Conference Citation; Tags: National Park Service, aircraft, monitoring, noise, overflight