Prediction of Excess Attenuation Spectrum for Natural Ground Cover

Abstract

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.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1972
Accession Number
AD0736844

Entities

People

  • S. P. Pao

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Absorption Spectra
  • Acoustic Impedance
  • Acoustic Propagation
  • Acoustic Properties
  • Acoustic Waves
  • Acoustics
  • Computer Programs
  • Computers
  • Diameters
  • Elastic Properties
  • Mechanical Properties
  • Noise Reduction
  • Porosity
  • Sound Waves
  • Thickness
  • Wave Propagation
  • Waves

Readers

  • Acoustics.
  • Atmospheric Remote Sensing.
  • Systems Analysis and Design