Measurements obtained for ground tests on a Twin Otter aircraft show that structureborne noise is a major contributor to the interior noise level. The structureborne source was the propeller blade wake and tip vortex interaction with the wing and contributes at the blade passage frequency and its harmonics.
Structureborne Contribution to Interior Noise of Propeller Aircraft
Sae Technical Papers
Business Aircraft Meeting and Exposition ; 1983
1983-02-01
Conference paper
English