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Subjective evaluation of helicopter blade slap noiseSeveral methods for adjusting EPNL to account for its underestimate of judged annoyance are applied to eight helicopter flyover noise signatures having various degrees of blade slap. A proposal for an impulsive noise correlation procedure based on a digital analysis of the flyover signal is investigated. When all data are combined, the proposal is little better than simply adding an arbitrary fixed adjustment of 3 decibels to EPNL.
Document ID
19790002673
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Galloway, W. J. (Bolt, Beranek, and Newman, Inc. Cambridge, MA, United States)
Date Acquired
August 10, 2013
Publication Date
August 1, 1978
Publication Information
Publication: NASA. Langley Res. Center Helicopter Acoustics, Pt. 2
Subject Category
Acoustics
Accession Number
79N10844
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19790002672Collected WorksHelicopter Acoustics, part 2
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