A Technique for Measuring the External Noise of a Moving Helicopter

Abstract

A technique has been devised to measure the noise produced by a moving helicopter. The equipment used is easily portable, relatively simple, accurate and provides instant readout of aircraft speed and altitude. The sound pressure levels measured during the flyovers have been corrected to a constant 200-foot distance from the source and polar plots have been prepared showing the corrected sound pressure level by octave bands

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1973
Accession Number
AD0773687

Entities

People

  • Donald L. Lince

Organizations

  • Human Engineering Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Equipment
  • Acoustic Measurement
  • Aircrafts
  • Altitude
  • Atmospheric Attenuation
  • Computer Programs
  • Data Reduction
  • Detection
  • Engineering
  • Flight Paths
  • Flight Speeds
  • Helicopters
  • Human Factors Engineering
  • Losses
  • Measurement
  • Recording Systems
  • Sound Pressure

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Aerospace Engineering
  • Approximation Theory.