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Experimental measurements of moving noise sourcesThe far-field pressure was measured from three different types of moving sources: a point monopole, a small model jet, and an aircraft. Results for the pressure time history produced by the point source show good agreement with those predicted analytically. Both actual and simulated forward motion of the model jet show reductions in noise levels with forward speed at all angles between the source and observer. Measurement with the aircraft over both an anechoic floor and over the ground yields a method for evaluating the transfer function for ground reflections at various angles between the moving aircraft and measurement position.
Document ID
19800006610
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Maestrello, L.
(NASA Langley Research Center Hampton, VA, United States)
Norum, T. D.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 10, 2013
Publication Date
August 1, 1979
Publication Information
Publication: AGARD Special Course on Acoustic Wave Propagation
Subject Category
Acoustics
Accession Number
80N14868
Distribution Limits
Public
Copyright
Other
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