Correction Procedures for Aircraft Noise Data. Volume I. Pseudotones.

Abstract

Pseudotones are spectral irregularities due to ground reflections which can cause tone corrections in the calculation of Effective Perceived Noise Level which are not generated by the aircraft itself. Several analytical (reflection theory, lower cutoff frequency for tone corrections) and instrumentation (ground and pole microphones) methods were investigated which remove the pseudotones. In support of this study, a substantial number of aircraft noise measurements were obtained and analyzed in detail; these data are also summarized in the report. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1979
Accession Number
ADA081962

Entities

People

  • R. Rackl

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircraft Noise
  • Aircrafts
  • Ambient Noise
  • Angle Of Incidence
  • Boundary Layer
  • Computer Programs
  • Computers
  • Data Acquisition
  • Data Sets
  • Detection
  • Diffraction
  • Doppler Effect
  • Frequency Bands
  • Jet Aircraft
  • Measurement
  • Surface Properties
  • Temperature Gradients

Readers

  • Approximation Theory.
  • Spectroscopy.
  • Tactical Satellite Communications Systems Engineering.