Listening Levels Preferred by Flying Personnel.
Progress rept. Feb-Jul 71,
SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX
Pagination or Media Count:
Speech intensity was adjusted to the preferred listening level by 65 flyers in the presence of 9 aircraft noise conditions and in quiet. The noises represented highest, lowest, and average overall levels at the pilot position in jet, propeller, and rotary-wing type aircraft. Twelve listeners also performed with dry cotton in the ear canals and another 12 with V-51R earplugs in place. Average preferred levels ranged from 79.5 to 95 dB SPL without ear protectors for the 9 noise conditions. Average preferred intensity in the quiet condition was 75.5 dB SPL. Author
- Anatomy and Physiology