Noise Measurement Flight Test: Data/Analyses Aerospatiale AS 355F TwinStar Helicopter,

Abstract

This report documents the results of a Federal Aviation Administration (FAA) noise measurement flight test program with the TwinStar twin-jet helicopter. The report contains documentary sections describing the acoustical characteristics of the subject helicopter and provides analyses and discussions addressing topics ranging from acoustical propagation to environmental impact of helicopter noise. This test program was designed to address a series of objectives including: (1) acquisition of acoustical data for use in assessing heliport environmental impact, (2) documentation of directivity characteristics for static operation of helicopters, (3) establishment of ground-to-ground and air-to-ground acoustical propagation relationships for helicopters, (4) determination of noise event duration influences on energy dose acoustical metrics, (5) examination of the differences between noise measured by a surface mounted microphone and a microphone mounted at a height of four feet (1.2 meters), and (6) documentation of noise levels acquired using international helicopter noise certification test procedures.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1984
Accession Number
ADA147497

Entities

People

  • E. J. Rickley
  • J. S. Newman
  • K. R. Beattie
  • T. L. Bland

Organizations

  • Federal Aviation Administration

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Propagation
  • Aircrafts
  • Birds
  • Data Acquisition
  • Data Analysis
  • Environment
  • Mach Number
  • Magnetic Recording Systems
  • Measurement
  • Radiosondes
  • Recording Systems
  • Regression Analysis
  • Sound Pressure
  • Tape Recording
  • Transport Aircraft
  • Transportation

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Aerospace Engineering
  • Business Analytics