Managing air tour noise and understanding soundscapes at various parks. Park acoustic environments are considerably different from urban and suburban areas. In parks, the environments are extremely quiet. In these very quiet places, simply hearing an unusual sound may be considered adverse, even from distant sources.
- Refined measurement techniques, including use of special instruments capable of acquiring accurate data in very quiet environments
- Designed and used observer-based source identification logging
- Took extensive measurements in Grand Canyon, Haleakala and Hawaii Volcanoes National Parks
- Took short-term measurements in Yellowstone, Glacier and Zion National Parks