Abstract
When multiple coherent sound sources are distributed on the same side of the holographic surface, the conventional method must use known information such as sound source distribution and geometry. In view of this situation, a method of coherent sound field separation combined with compressive sensing is proposed. The method is based on the plane equivalent source near-field acoustic holography method and the orthogonal matching pursuit algorithm of compressive sensing technology. Get the distribution of the virtual sound source on the plane, and then the virtual sound sources are grouped and selected. Finally, the distribution of sound pressure in the near-field plane after separation of the sound field is calculated using the conduction matrix. The method does not require other prior knowledge. The simulation results show that this method can be used as an effective complementary method for coherent sound field separation based on single-sided measurement.
Highlights
The existing acoustic imaging technology is mainly implemented by near-field acoustical holography (NAH) [1, 2]
When there are multiple coherent sources in the sound field and they are on the same side of the holographic surface, the holographic surface measurement results in a composite sound field produced by each coherent source
The simulation results show that this method can be used as an effective complementary method for coherent sound field separation based on single-sided measurement
Summary
The existing acoustic imaging technology is mainly implemented by near-field acoustical holography (NAH) [1, 2]. When there are multiple coherent sources in the sound field and they are on the same side of the holographic surface, the holographic surface measurement results in a composite sound field produced by each coherent source At this time, the sound pressure distribution of a single sound source and its contribution in the sound field cannot be obtained by the conventional near-field acoustic holography methods. Double -side sound field separation methods needed to measure sound pressure data on two planes. Many scholars have conducted extensive research on sound field separation technology based on single-sided measurement. The simulation results show that this method can be used as an effective complementary method for coherent sound field separation based on single-sided measurement
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