An analytical study is described which explores add-on treatments and advanced concepts for the reduction of noise levels in three high-speed aircraft driven by propellers. Noise reductions of 25 to 28 dB are required to achieve a goal of an A-weighted sound level not greater than 80 dB. It is found that only a double-wall system, with a limp inner wall or trim panel, can achieve the required noise reductions. Weight penalties are estimated for the double-wall treatments. These penalties are 0.75 % to 1.51 % of the airplane takeoff weight for the particular baseline designs selected. (Krautzig)
Noise control prediction for high-speed, propeller-driven aircraft
Schalldaempfungsvoraussage fuer Hochgeschwindigkeitspropellerflugzeuge
AIAA-Papers ; 1-10
1980
10 Seiten, 17 Bilder, 3 Tabellen, 14 Quellen
Conference paper
English
Prediction of the interior noise levels of high-speed propeller-driven aircraft
Tema Archive | 1980
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