基于声强测量的圆柱内部全息柱面复声压相位重构

Sound intensity measurement-based phase reconstruction of complex sound pressure on holographic surface within a cylindrical cavity

本文把基于声强测量的全息相位重构原理应用到圆柱内部声场中,阐述了圆柱面相位重构原理,推导了相应的有限空间离散算法并计算了圆柱声腔内主要声模态。结果表明,重构相位和理论值有较好的吻合。最后,分析了重构频率、全息孔径及全息柱面与壳体的间距等重构参数对相位重构精度的影响。

Broadband acoustic holography from intensity measurement （BAHIM） is applied to the interior sound field within a cylindrical cavity. Principle of phase reconstruction in the cylindrical coordinate is mentioned, and its finite and discrete expressions are deduced. Some important acoustic modes in the cavity are simulated and the results show that reconstructed phase values are well matched with the theoretical. Finally, influences of the reconstruction parameters, such as frequency, length of hologram and distance between hologram and cylinder, on the accuracy of ohase reconstruction are examined