A review of acoustic imaging methods using phased microphone arrays

R. Merino-Martínez (1) , P. Sijtsma (1) , M. Snellen (1) , T. Ahlefeldt (2) , J. Antoni (3) , C.J. Bähr (4) , Daniel Blacodon (5) , D. Ernst (2) , A. Finez (6) , S. Funke (7) , T. Geyer (8) , S. Haxter (2) , G. Herold (9) , X. Huang (10) , M. Humphreys (4) , Quentin Leclere (11, 3) , A. Malgoezar (1) , U. Michel (12) , T. Padois (13) , A. Pereira (14) , C. Picard (6) , E. Sarradj (9) , H. Siller (2) , D. Simons (1) , C. Spehr (2)

1 TU Delft - Delft University of Technology
2 DLR - German Aerospace Center
3 LVA - Laboratoire Vibrations Acoustique
4 LaRC - NASA Langley Research Center [Hampton]
5 DAAA, ONERA, Université Paris-Saclay (COmUE) [Châtillon]
6 MicrodB
7 BRR - Rolls-Royce Deutschland
8 BTU - Brandenburg University of Technology [Cottbus – Senftenberg]
9 TU - Technical University of Berlin / Technische Universität Berlin
10 Peking University [Beijing]
11 CeLyA - centre Lyonnais d'Acoustique
12 CFD Software Entwicklungs- und Forschungsgesellschaft mbH [Berlin]
13 ETS - Ecole de Technologie Supérieure [Montréal]
14 LMFA - Laboratoire de Mecanique des Fluides et d'Acoustique

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.

Mots clés: Aeroacoustic measurements; Deconvolution; Beamforming; Acoustic imaging; Phased microphone arrays

Domaines: Acoustique [physics.class-ph]

R. Merino-Martínez, P. Sijtsma, M. Snellen, T. Ahlefeldt, J. Antoni, et al.. A review of acoustic imaging methods using phased microphone arrays. CEAS Aeronautical Journal, 2019, 10 (1), pp.197-230. ⟨10.1007/s13272-019-00383-4⟩. ⟨hal-02120941⟩