Hubbard H, Shepherd K, NASA – Wind Turbine Acoustics 1988
NASA – 1988 Technical paper on wind turbine acoustics research
Harvey H Hubbard & Kevin P Shepherd
“The assessment of technical information available in 1988 is intended for use in designing and siting future large wind turbine systems as well as for assessing the noise environment of e3xisting wind turbine systems. ….. Guidance for evaluating human exposure to wind turbine noise is provided …”