The detection of aeroacoustic sources in closed or open wind-tunnels usually involves microphone arrays. In this case, the source are searched in a planar two-dimensional grid. Recently, the potential of beamforming with a three-dimensional grid has been studied but with a two-dimensional planar array. In this paper, we apply sound source localization techniques to a three-dimensional array. First, a numerical solver is used to simulate the acoustic propagation to the microphone arrays in order to validate the source localization methods. The results show that the source position is localized accurately. An experiment in a closed wind-tunnel is presented. We use four microphone arrays installed on the sides of a wind-tunnel. Each microphone array has 48 microphones. Two types of acoustic sources are used. The first one is a monopolar sound source with known amplitude and position. Then a cylinder is mounted across the flow to generate dipolar radiation patterns.
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