INVESTIGATION OF THE NOISE ASPECTS OF CARRIER DECK JET ENGINE OPERATION, AND EFFECTS OF NOISE SUPPRESSION ON AIRCRAFT MISSION PERFORMANCE. VOLUME I. EFFECTS OF NOISE FROM CARRIER DECK JET ENGINE OPERATION ON HEARING, SPEECH INTERFERENCE, AND SONIC FATIGUE

Abstract

Information gathered from a literature search relative to hearing loss vs. noise exposure is reviewed. The results of such studies are applied to the specific problem of determining criteria applicable to the hearing damage risk problem aboard aircraft carriers. Simple nomograms are derived to quickly evaluate the maximum allowable exposure time to a given sequence of take-offs expressed in terms of octave-band sound level vs. time plots at the observer's ear. These charts are based upon the allowance of a computed TTS2 (temporary threshold shift 2 minutes after exposure to the noise) of 10-13 db at 2000 cps and 20-23 db at 4000 cps. Additional nomograms allow rapid computation of TTS growth and recovery during noisy and quiet periods respectively. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 31, 1964
Accession Number
AD0432086

Entities

People

  • M. W. Schulz
  • R. B. Tatge
  • R. J. Wells

Organizations

  • General Electric

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Aircraft Carriers
  • Ear
  • Engine Noise
  • Frequency Bands
  • Jet Aircraft
  • Jet Engine Noise
  • Jet Engines
  • Materials
  • Measurement
  • Probability Density Functions
  • Random Variables
  • Resonant Frequency
  • Sound Pressure
  • Strain Gages
  • Test And Evaluation
  • Turbojet Engines

Readers

  • Aerospace Engineering
  • Regression Analysis.
  • Speech Processing/Speech Recognition.