Abstract:
Compressive sensing has been applied to near-field acoustic holography technology to improve the reconstruction accuracy of the sound field with limited measurement points. However, most applications focus on the reconstruction of sound pressure, and the corresponding sparse bases is designed for sound pressure. In order to reconstruct the particle velocity of sound field, in this paper, a sparse basis for particle velocity of the sound field is constructed based on the sound radiation mode of equivalent source strength, and the particle velocity of the sound field is accurately reconstructed from limited measurements by taking advantage of sparse regularization. To verify the effectiveness of the proposed method, numerical simulation of a simply supported plate is provided. The simulation results showed that, compared to conventional equivalent source methods, the proposed method is more accurate and more stable with limited measurement points. The experimental results further validate the effectiveness of the method proposed in this paper.