Back to Search Start Over

Identification of anomalies in microphone array measurements of trailing edge noise by eigenstructure analysis.

Authors :
Defreitas, Aaron
Alexander, W. Nathan
Source :
Journal of the Acoustical Society of America. Feb2023, Vol. 153 Issue 2, p1073-1083. 11p.
Publication Year :
2023

Abstract

An eigenstructure analysis is used to identify anomalies in large acoustic array measurements of airfoil trailing edge noise. Cross-spectra of 102 microphones distributed in a spiral configuration were inspected considering a range of inflow conditions and airfoil configurations. A measurement expectation is set by repeat measurements of non-anomalous data and is used for the analysis of additional data. This method is based solely on the comparison between the eigenstructure of cross-spectral matrices and can be used to efficiently inspect data for anomalies without having to beamform, as is conventional. Thus, processing and reviewing beamform maps can be relegated to post-processing after the experiment when more time is available. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00014966
Volume :
153
Issue :
2
Database :
Academic Search Index
Journal :
Journal of the Acoustical Society of America
Publication Type :
Academic Journal
Accession number :
162170613
Full Text :
https://doi.org/10.1121/10.0016863