Noise and Speech Levels Associated with the F-111A Prep Area, McClellan AFB

Abstract

The purpose of the study was to measure the ambient noise environment and speech reception levels associated with the F-111A flight prep area at McClellan AFB, California; to measure noise attenuation characteristics of several ear protection devices contemplated for use in the ambient noise; and to determine maximum permissible human exposure durations based on these data. The results show that a H-133 (standard AF communication headset, microphone) in combination with a custom molded insert communication earplug would permit personnel to be exposed up to 8 hours continuously at the 70% and 85% engine power settings. These time limits decrease to 36 minutes per 8 hour day during afterburner zone 5. Even in the highest noise levels, communication capability was satisfactory with this earplug/headset combination.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1972
Accession Number
AD0744828

Entities

People

  • Henry C. Sommer
  • Justus F. Rose Jr.

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Biomedical
  • Human Systems
  • Space

DTIC Thesaurus Topics

  • Acoustic Signals
  • Acquisition
  • Air Force
  • Air Force Facilities
  • Ambient Noise
  • Biomedical Research
  • Classification
  • Communication Systems
  • Frequency
  • Instrumentation
  • Maintenance Personnel
  • Measurement
  • Microphones
  • Security
  • Sound Pressure
  • Transducers
  • Turbofan Engines

Readers

  • Academic Conference Management
  • Acoustics.
  • Aerospace Test and Evaluation