Sound Levels of Five Motorcycles Travelling Over Forest Trails: Rock Creek Orv Area |
Common terms and phrases
1/Mtr 2 dBA Aircraft clearly audible animals audible Distant background sound Black Oak community noise level cycle Day Night level distances of 400 effects of noise ELDORADO elevation equivalent level Forest Service frequency weighted ft or greater Georgetown Ranger District gusty wind Gusty hearing mechanism Honda impact statement INSTRUMENT LOCATION level mea level measured Level Mtr 1/Mtr Line of sight listening Maximum level measure motorcycle measured sound Measurement locations ment locations minute measurement period motor motorcycle noise motorcycle sound Motorcycles clearly audible motorcycles increase Motorcycles not audible motorcycles were audible Mtrcycl Mtrcycl nearest point no-motorcycle noise effects obscured by vegetation off-road overflight Ponderosa/Manzanita stand presence of motorcycles present riders ridge riding courses Rock Creek area San Dimas sight was obscured sound level meter SOUND MEASURENTS stand with occasional study Ref Table Technology and Development test location Test Motorcycle tion typical U.S. Department USDA wilderness wildlife wind Gusty wind Yamaha