Helicopter Noise Contour Development Techniques and Directivity Analysis.

Abstract

This paper briefly summarizes techniques which have been developed for use in creating helicopter air-to-ground, noise-distance relationships. Discussion is provided concerning FAA efforts to establish an accurate and practical method (which considers source directivity) for modeling the noise impact associated with helicopter operations. Plots of normalized directivity vectors are provided for eight helicopters in various modes of flight. (Author)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1980
Accession Number
ADA093426

Entities

People

  • J. Steven Newman

Organizations

  • Federal Aviation Administration

Tags

Communities of Interest

  • Air Platforms
  • Biomedical

DTIC Thesaurus Topics

  • Absorption
  • Air Force
  • Atmospheric Attenuation
  • Attenuation
  • Brain
  • Databases
  • Elevation
  • Flight Paths
  • Helicopters
  • Measurement
  • Observers
  • Slant Range
  • Sound Pressure
  • Spectra
  • Systems Engineering
  • Tail Rotors
  • Transport Aircraft

Fields of Study

  • Physics

Readers

  • Aviation Science / Aeronautics.
  • Neurodegenerative Parkinson's Disease and Rickettsial Disease handbook, including the data level of dopamine, BC, neurons, and PD.
  • Systems Analysis and Design