As an acoustic field visualization technology, beamforming based on the monopole assumption has been widely applied in identifying acoustic sources. However, in practical engineering applications, complex types of sound sources make it difficult for beamforming based on the single sound source assumption to identify different types of sound sources pertinently. This paper proposes a hybrid deconvolution method to separate the combined sources containing monopoles and dipoles. The approach constructs a linear equation between the beamforming output and the actual sound source distribution, and monopoles and dipoles can be extracted from the combined sources by solving this linear equation. Four simulation cases and three experimental cases are designed to check the hybrid deconvolution algorithm. The combined sources in the experiment are composed of a dipole formed by a cylindrical spoiler and a monopole caused by a speaker. The results indicate that this method can separate the combined sound sources effectively and ensure the accuracy of the sound source strength, despite the multipoles. This method is expected to be applied in aerodynamic noise recognition, extracting target sources from high-speed jet noise, and better studying the composition of jet noise.
ZHOU Wei
,
YANG Mingsui
,
MA Wei
. A method for separation of monopole and dipole sources based on phased microphone array[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022
, 43(2)
: 124901
-124901
.
DOI: 10.7527/S1000-6893.2020.24901
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