The amount of noise reaching an aircraft's interior by structureborne paths, when high levels of other noises are present, involves the measurement of transfer functions between vibrating levels on the wing and interior noise. The magnitude of the structureborne noise transfer function is established by exciting the aircraft with an electrodynamic shaker; a second transfer function is measured using the same sensor locations with the aircraft engines operating. Attention is given to the case of a twin-turboprop OV-10A aircraft; the resulting transfer function values at the discrete frequencies corresponding to the propeller blade passage frequency and its first four harmonics are tabulated and illustrated.
Structureborne noise in aircraft
Mechanical signature analysis - Machinery vibration, flow-induced vibration, and acoustic noise analysis
1987-01-01
Conference paper
No indication
English
Structureborne noise in aircraft
Tema Archive | 1987
|Structureborne Noise in Aircraft: Modal Tests
NTIS | 1986
|Structureborne noise in aircraft: Modal tests
NTRS | 1986
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