A review of acoustic imaging methods using phased microphone arrays
Part of the “Aircraft Noise Generation and Assessment” Special Issue
R. Merino-Martínez (TU Delft - Aerospace Engineering)
P. Sijtsma (TU Delft - Aerospace Engineering)
M. Snellen (TU Delft - Aerospace Engineering)
A. Finez (MicrodB)
G. Herold (Technical University of Berlin)
A. Malgoezar (TU Delft - Aerospace Engineering)
A. Pereira (École Centrale de Lyon)
E. Sarradj (Technical University of Berlin)
D. G. Simons (TU Delft - Aerospace Engineering)
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Abstract
Phased microphone arrays have become a well-established tool for performing aeroacoustic measurements in wind tunnels (both open-jet and closed-section), flying aircraft, and engine test beds. This paper provides a review of the most well-known and state-of-the-art acoustic imaging methods and recommendations on when to use them. Several exemplary results showing the performance of most methods in aeroacoustic applications are included. This manuscript provides a general introduction to aeroacoustic measurements for non-experienced microphone-array users as well as a broad overview for general aeroacoustic experts.
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