Prediction of Excess Attenuation Spectrum for Natural Ground Cover
Interim technical rept.
WYLE LABS HUNTSVILLE AL
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In earlier portions of the present research program, a precise mathematical model was developed for the estimation of sound absorption over a ground cover layer. The usefulness and validity of this analysis was confirmed by results obtained through a laboratory-scaled experiment. In the present study, the above mentioned mathematical model is applied to the prediction of sound absorption over various types of ground covers composed of natural vegetations. Through an extensive review of literature in agriculture and forestry, the physical structure and relevant mechanical properties of ground cover canopies have been determined. The acoustical properties of the ground cover itself has also been estimated.