RESULTS OF TESTS INVOLVING HEMISPHERICAL WIND SCREENS IN THE REDUCTION OF WIND NOISE,

Abstract

Hemispherical wind screens, covered with screen mesh and acoustic cloth, are of considerable value in reducing wind noise associated with infrasonic monitoring devices and improving the signal-to-noise ratio as shown in field and wind tunnel tests. The amplitude of the wind noise below sixteen (16) cps was significantly reduced and noise components at higher frequencies were effectively eliminated. Comparison tests showed that wind screens of three feet in diameter are more effective for noise reduction than the method used in the SOTIM (sonic observation of the trajectory and impact of missiles) system. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1967
Accession Number
AD0653005

Entities

People

  • A. H. Breeland
  • R. S. Bonner

Organizations

  • Atmospheric Sciences Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Amplitude
  • Diameters
  • Frequency
  • Monitoring
  • Noise
  • Noise Reduction
  • Observation
  • Trajectories
  • Wind Tunnel Tests
  • Wind Tunnels

Readers

  • Fluid Dynamics.
  • Mathematics or Statistics
  • Radar Systems Engineering.