HAARP diesel engine-generator(s) noise study
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HAARP diesel engine-generator(s) noise study

  • Published Date:

    2005-01-07

  • Language:
    English
Filetype[PDF-1.01 MB]


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  • NTL Classification:
    AGR-IMPACTS-Environment ; NTL-ENERGY AND ENVIRONMENT-ENERGY AND ENVIRONMENT ; NTL-ENERGY AND ENVIRONMENT-Environment Impacts ;
  • Abstract:
    This document presents the results and corresponding analysis of an outdoor noise measurement program conducted by the John A. Volpe National Transportation Systems Center’s Acoustic Facility (Volpe Center) at the United States Air Force’s High Frequency Active Auroral Research Program antenna array (HAARP) in Gakona, AK from September 27th through 30th, 2004. Specifically, the noise generated by the on-site diesel power plant driving the HAARP antenna array was investigated in this study. This power plant consists of a single diesel engine driving a generator inside the main HAARP facility building, with the cooling and exhaust mounted on opposite sides of the building. The acoustic team, consisting of Eric Boeker of the Volpe Center and Jim Battis of the U.S. Air Force (USAF), performed noise measurements at eight locations equally-spaced around the power plant installation to characterize the existing noise levels of the HAARP power plant, and at a ninth location on the edge of the USAF facility to evaluate the HAARP-generated noise levels at the closest neighboring piece of private property. Three 10-minute-long samples representing the maximum engine-generator loading (resulting in the maximum expected noise levels from the power plant) were broadcast by the HAARP antenna array on September 29th, 2004; and 1-second, A-weighted equivalent sound pressure levels (1-second LAeq) were measured with slow response at all measurement locations (as well as 1/3-Octave, Un-weighted spectral data for three microphones near the cooling port, the exhaust port, and at the adjacent private property).
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