近场声全息线阵传声器“扫描”测量方法及其误差研究

STUDY OF SCANNING METHOD AND ITS TOLERANCE OF LINEAR ARRAY MICROPHONE BASED ON NAH

研究了近场平面声全息"扫描"测量实验方法、重构中窗函数、K空间滤波器对全息重构的影响.对单个音响做了三个平行面的全息"扫描"测量,然后用中间面的测量声压来全息重构其它两个面的声压,并与实际测量值进行比较,验证了声全息"扫描"测量的可靠性与全息重构的正确性.

In this paper, a study on planar near-field acoustical holography scan measurement method and how window function and K-space filter affect holography reconstruction is presented. Firstly, holography scan measurement on the acoustic source in three parallel planes is taken, then the acoustic pressure of the other two planes is holography reconstructed using the measured acoustic pressure of the middle plane, and finally the reconstructed and the measured results are compared, which shows that the acoustical holography scan measurement method is reliable and the holography reconstruction is correct.