基于数据外推与内插的联合局部近场声全息

Joint Patch Near-field Holograph Based on Data Extrapolation and Data Interpolation

基于波叠加的数据外推与内插技术是两种基于波叠加法的对全息面数据进行扩展处理的局部近场声全息算法。依据数据外推与内插技术的优势与不足之处,提出了一种基于波叠加的数据外推-内插联合局部近场声全息技术,该技术在全息面测量数据的基础上同时进行数据内插与外推,从而在提高全息面分辨率的同时等效的扩大了测量孔径,以求实现用有限的传声器获得更为全面的声场信息,提高了声场重建的精度,同时降低了声场测量要求。数值仿真结果表明了该技术的实用性与有效性。

Data extrapolation and data interpolation based on wave superposition method （WSM） are two Patch- NAH algorithms aimed at extending the holographic plane data. A data extrapolation-interpolation jointed Patch near-field holograph is proposed based on WSM due to the advantages and disadvantages of data extrapolation and data interpolation, This method interpolate and extrapolate based on the holographic measurement data, and it im- proved the holographic plane resolution and expanded the measurement diameter at the same time, in order to obtain more sound field information using the less microphone and improve the precision of reconstruction, and decreased the measurement requirements of the sound field The simulations indicate the practicability and effectiveness of the proposed method.