Acoustic Propagation Through a Forest Edge: Data Report for Camp Ripley, Minnesota
ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL CONSTRUCTION ENGINEERING RESEARCH LAB
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Acoustic propagation and diffraction of high-amplitude, short duration signals through a forest edge have implications for noise mitigation and battlefield acoustic sensors. While the acoustic significance of this unique environment has been noted in the past, it has not been studied in any detail. Acoustic signals that have propagated through a forest edge yield complicated pressure-time histories for receivers both within and outside the forest. Several physical processes contribute to this complexity, including the physical structures of the biomass and ground and the microclimate. A deep understanding of acoustic propagation through this unique environment may lead to strategic placement of fire breaks for noise mitigation and improved signal processing algorithms for use with acoustic detection, and direction-finding and range-finding sensors. Because of the broad scope of issues that could be addressed once acoustic propagation and diffraction at a forest edge is understood, it is important to study this unique environment in detail. This report provides documentation of a field experiment conducted as part of a study of the acoustic properties of the forest edge environment.