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Review of Noise Metric Sensitivities for Analysis of Quiet Supersonic OverflightSix different noise metrics (PL, ASEL, BSEL, DSEL, ESEL, and ISBAP) are currently used to quantify sonic boom levels from overflight of supersonic aircraft. A previous meta-analysis using laboratory subjective data identified these metrics, each of which correlated well with human perception of low-boom sounds both indoors and outdoors. Because the analysis did not identify a single metric that was significantly superior, no internationally agreed-upon metric has been chosen for the quiet supersonic aircraft noise certification procedures currently under development. Other analyses of metric sensitivities using existing empirical and simulation datasets, however, have shown significant differences between metrics. Variability of metrics due to macro-atmospheric effects and atmospheric turbulence perturbations have been explored, as well as variability in measurements due to microphone setup configurations, array layouts, and ambient noise effects. This paper reviews these prior studies, summarizes the current understanding of metric sensitivities, and discusses how they may impact future downselection of metrics for certification procedures.
Document ID
20220007685
Acquisition Source
Langley Research Center
Document Type
Presentation
Authors
Alexandra Loubeau
(Langley Research Center Hampton, Virginia, United States)
Date Acquired
May 18, 2022
Subject Category
Acoustics
Meeting Information
Meeting: 182nd Meeting of the Acoustical Society of America
Location: Denver, CO
Country: US
Start Date: May 23, 2022
End Date: May 27, 2022
Sponsors: Acoustical Society of America
Funding Number(s)
WBS: 110076.02.07.06.14
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Technical Review
NASA Peer Committee
Keywords
sonic boom
metrics
X-50
noise certification
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