First Article Noise Survey of the A/F32T-9 Large Turbo Fan Engine Enclosed Noise Suppressor System, Far-Field Noise, Ellsworth AFB, South Dakota

摘要

The A/F32T-9 Large Turbo Fan Engine, Enclosed Noise Suppressor System (T-9 NSS) at Ellsworth AFB SD was surveyed to determine noise levels at 100 meters (m). With an F101 engine operating at afterburner power the highest measured Overall Sound Level, A-Weighted (OASLA) was 78.4 dB(A). The measured OASLA values exceeded the 77 dB(A) criterion at only 7 of the 18 sampling positions at a range from 0.3 to 1.4 dB(A).