Middle-Ear Muscle Reflex to Aircraft Noise.
Abstract
Middle-ear muscle reflex threshold with three types of aircraft noise and with a 1000-Hz pure tone was sought with 21 rated flying personnel. Three subjects failed to respond to the noise at maximum intensity (108-dB SPL). Average reflex threshold in dB SPL for the other 18 subjects was 94.8 dB for the 1000-Hz tone, 95.2 dB for T-37B noise, 98.8 dB for UH-1P noise, and 94.4 dB for F-4E noise. Threshold for the UH-1P noise was significantly higher than thresholds for the other sounds. No other differences were significant. Threshold SPLs are well within the range of intensities commonly present in aircraft, which suggests that this reflex be considered in any study dealing with the effects of aircraft noise on occupants. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1973
- Accession Number
- AD0764739
Entities
People
- Donald C. Gasaway
- Harrell C. Sutherland Jr.
- Roy Danford Jr.
Organizations
- United States Air Force School of Aerospace Medicine