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)
Listening Levels Preferred by Flying Personnel
1971
16 pages
Report
No indication
English
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