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A loudness calculation procedure applied to shaped sonic boomsDescribed here is a procedure that can be used to calculate the loudness of sonic booms. The procedure is applied to a wide range of sonic booms, both classical N-waves and a variety of other shapes of booms. The loudness of N-waves is controlled by overpressure and the associated rise time. The loudness of shaped booms is highly dependent on the characteristics of the initial shock. A comparison of the calculated loudness values indicates that shaped booms may have significantly reduced loudness relative to N-waves having the same peak overpressure. This result implies that a supersonic transport designed to yield minimized sonic booms may be substantially more acceptable than an unconstrained design.
Document ID
19920002547
Document Type
Technical Publication (TP)
Authors
Shepherd, Kevin P. (NASA Langley Research Center Hampton, VA, United States)
Sullivan, Brenda M. (Lockheed Engineering and Sciences Co. Hampton, VA., United States)
Date Acquired
September 6, 2013
Publication Date
November 1, 1991
Subject Category
ACOUSTICS
Report/Patent Number
NASA-TP-3134
NAS 1.60:3134
L-16913
Funding Number(s)
PROJECT: RTOP 537-03-21-03
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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