Comparison between the WSCAFFIP Model and Measured Rotorcraft Sound Pressure Levels

Abstract

Field acoustic measurements of a hovering rotorcraft were made and the attenuation of each of its harmonics was computed as a function of slant range. Windows Scanning Fast Field Program (WSCAFFIP), an acoustic propagation model, was run to compute theoretical attenuations for the conditions existing during the measurements. Comparisons were made between the measured and modeled attenuations. Generally, the measured values supported the model, with some discrepancies at higher harmonics and lower altitudes, as well as a few slant ranges.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2002
Accession Number
ADA401313

Entities

People

  • John D. Williams

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Electronic Warfare
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Measurement
  • Acoustic Propagation
  • Acoustics
  • Altitude
  • Attenuation
  • Harmonics
  • High Altitude
  • Hovering
  • Losses
  • Low Altitude
  • Measurement
  • Meteorological Data
  • Military Research
  • Rotary Wing Aircraft
  • Scanning
  • Slant Range
  • Sound Pressure

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Explosive Engineering.
  • Fluid Dynamics.