Modeling sound due to over-snow vehicles in Yellowstone and Grand Teton National Parks

Details

• Creators:
  Hastings, Aaron L. ; Fleming, Gregg G. ; Lee, Cynthia S. Y.
• Corporate Creators:
  John A. Volpe National Transportation Systems Center (U.S.)
• Corporate Contributors:
  United States. National Park Service ; Yellowstone National Park (U.S.)
• Subject/TRT Terms:
  • Ground effect
  • National parks
  • Snowmobiles
  • Sound level
  • Noise
  • Sound transmission
  • Ambient noise
  • Maps Integrated noise model
• Publication/ Report Number:
  DOT-VNTSC-NPS-06-06;NPS-D-1201
• Resource Type:
  Tech Report
• Geographical Coverage:
  Wyoming
• Edition:
  Final report; Oct 2006
• Corporate Publisher:
  United States. National Park Service
• Abstract:
  A modified version of the FAA’s Integrated Noise Model (INM) Version 6.2 was used to ; model the sound of over-snow vehicles (OSVs) (snowmobiles and snowcoaches) in ; Yellowstone and Grand Teton National Parks for ten modeling scenarios provided by the ; National Park Service (NPS). Version 6.2 was modified to incorporate ground-to-ground ; sound propagation models consistent with propagation over snow-covered terrain (40 cgs ; rayls) for OSVs. Sound level relationships were developed for OSVs relating maximum Aweighted ; sound level (LAmax) to vehicle speed and distance from observer. Audibility and ; LAmax contours were generated and rank ordered for the ten modeling scenarios according ; to percent of park covered by a particular contour. In general, the use of Best ; Available Technology (BAT) OSVs, the reduction in the number of active paths, and the ; reduction in number of operations all reduced audibility in the parks. These results ; are expected to help the NPS in refining their winter use plans for the Parks.
  More +
• Format:
  PDF
• Funding:
  VX82-CM355
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/12460/dot_12460_DS1.pdf
• File Type:
  [PDF - 2.50 MB]
• Collection(s):
  Volpe Center
• Main Document Checksum:
  urn:sha-512:c491424f6111f9b7d082511ca8ea762d0e125a860413b1ec5dd46aa537d5fc6c11736766d2cfef97d06461dcb113ddbea903b8b28ff730de7968adec6367237e