USAF Bioenvironmental Noise Data Handbook. Volume 75. C-141A Aircraft, Near and Far-Field Noise.

Abstract

The USAF C-141A is a transport aircraft powered by four TF33-P-7 turbofan engines. This report provides measured and extrapolated data defining the bioacoustic environments produced by this aircraft operating on a concrete runup pad for three power conditions. Near-field data are reported for ten locations in a wide variety of physical and psychoacoustic measures: overall and band sound pressure levels, C-weighted and A-weighted sound levels, preferred speech interference level, perceived noise level, and limiting times for total daily exposure of personnel with and without standard Air Force ear protectors. Far-field data measured at 19 locations are normalized to standard meteorological conditions and extrapolated from 75-8000 meters to derive sets of equal-value contours for these same seven acoustic measures as functions of angle and distance from the source.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1979
Accession Number
ADA079865

Entities

People

  • Robert G. Powell

Tags

Communities of Interest

  • Air Platforms
  • Biomedical
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Biomedical Research
  • Data Processing
  • Engine Noise
  • Engines
  • Environment
  • Exhaust Gases
  • Far Field
  • Handbooks
  • Measurement
  • Near Field
  • Sound Pressure
  • Standards
  • Three Dimensional
  • Transport Aircraft
  • Turbofan Engines

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