Accession Number:

ADA460838

Title:

A Comparison of Baseline Hearing Thresholds Between Pilots and Non-Pilots and the Effects of Engine Noise

Descriptive Note:

Final rept.

Corporate Author:

FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROMEDICAL INST

Report Date:

2005-06-01

Pagination or Media Count:

14.0

Abstract:

Observations in simulator studies suggested that the older segments of the general aviation pilot population were having difficulty hearing specific auditory warnings in the cockpit. These observations, in combination with data from Tobias 1968a 1968b 1972, prompted a reexamination of the hearing capabilities of pilots and non-pilots. In Phase 1, threshold data were collected for 150 non-pilots and 150 pilots using stratified age sampling. The usual higher-frequency decrements attributable to aging and general environmental exposure were found in both samples. Significant differences were found between the non-pilot and pilot samples, with greater threshold shifts between 2 and 6 kHz in evidence among the pilots. In Phase 2, participants thresholds were measured during both a quiet condition and during exposure to simulated aircraft engine noise. Results of both phases are discussed in terms of implications for the design of auditory warnings for general aviation aircraft.

Subject Categories:

  • Anatomy and Physiology
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE