DESCRIPTIONS OF FLYOVER NOISE SIGNALS PRODUCED BY VARIOUS JET TRANSPORT AIRCRAFT

Abstract

The report provides descriptions of maximum levels and time durations for 45 flyover noise signals produced by a variety of turbojet and turbofan transport aircraft in current airline service. The descriptions are based upon one-third octave band noise spectra determined at one-half second intervals throughout the flyover time histories. Comparisons are provided between integrated perceived noise levels, effective perceived noise levels, perceived noise levels calculated from the maximum third-octave band noise levels occurring during the flyover and N-weighted noise levels. Comparison of various duration measurements and corrections are also presented for durations measured at levels of 10 dB and 20 dB down from the maximum flyover levels. Comparisons indicate high correlation among many of the different measures describing maximum noise levels and duration.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1967
Accession Number
AD0657633

Entities

People

  • Dwight E. Bishop

Organizations

  • BBN Technologies

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acquisition
  • Aircrafts
  • Band Spectra
  • Data Acquisition
  • Data Analysis
  • Dynamic Range
  • Frequency
  • Frequency Bands
  • Instrumentation
  • Intervals
  • Jet Transport Aircraft
  • Measurement
  • Plastic Explosives
  • Spectra
  • Transport Aircraft
  • Turbofan Engines
  • Turbojet Engines

Fields of Study

  • Physics

Readers

  • Electronics Engineering
  • Mathematics or Statistics
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