A-Weighted Sound Levels in Cockpits of Fixed- and Rotary-Wing Aircraft.

Abstract

Noise measurements obtained within the cockpits of 339 fixed- and rotary-wing aircraft during normal cruise are reported. The sample includes 271 fixed-wing and 68 rotary-wing aircraft that are grouped according to type and number of power plants. Mean A-weighted levels ranged from 92 to 105 dB for fixed-wing vehicles and from 98 to 106 dB for helicopters. Means and standard deviations are reported by octave-bands, all-pass (flat), A-levels, and preferred speech interference levels (PSIL, average of 500, 1000 and 2000 Hz). Also, at-the-ear A-levels are reported for generalized amounts of attenuation provided by headsets commonly worn in aircraft. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1975
Accession Number
ADA015735

Entities

People

  • Donald C. Gasaway

Organizations

  • United States Air Force School of Aerospace Medicine

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Attenuation
  • Data Science
  • Helicopters
  • Information Science
  • Measurement
  • Rotary Wing Aircraft
  • Standards
  • Vehicles

Readers

  • Acoustics.
  • Aerospace Engineering
  • Phased Array Antenna Design.