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Structureborne noise in aircraftThe 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.
Document ID
19880044398
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Clevenson, S. A.
(NASA Langley Research Center Hampton, VA, United States)
Metcalf, V. L.
(NASA Langley Research Center; U.S. Army, Research and Technology Laboratories, Hampton VA, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Subject Category
Aircraft Design, Testing And Performance
Accession Number
88A31625
Distribution Limits
Public
Copyright
Other

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