Details:

Creators:
Hastings, Aaron L. ; Fleming, Gregg G. ; Lee, Cynthia S. Y.
Hastings, Aaron L. ; Fleming, Gregg G. ; Lee, Cynthia S. Y. Less -
Corporate Creators:
John A. Volpe National Transportation Systems Center (U.S.)
Corporate Contributors:
United States. National Park Service ; Yellowstone National Park (U.S.)
United States. National Park Service ; Yellowstone National Park (U.S.) Less -
Subject/TRT Terms:
[+]
Ambient Noise Ground Effect Integrated Noise Model Maps National Parks Noise Snowmobiles Sound Level Sound Transmission
Publication/ Report Number:
DOT-VNTSC-NPS-06-06 ; NPS-D-1201
DOT-VNTSC-NPS-06-06 ; NPS-D-1201 Less -
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.


Format:
PDF
Funding:
VX82-CM355
Collection(s):
Volpe
Main Document Checksum:
[+]
urn:sha256:01985f013b7c24a668fe2f900af66cefb824819f017aac1c0067c4bf116f041e
Download URL:
https://rosap.ntl.bts.gov/view/dot/12460/dot_12460_DS1.pdf
File Type:

Supporting Files

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