Joint patch near-field holography based on the statistically optimal near-field acoustical holography and the wave superposition method

A method named Joint Patch Near-field Holography(JPNAH) is proposed based on the statistically optimal near-field acoustical holography and the wave superposition method.The basic idea is that the fictitious sources' location essential to the wave superposition method can be decided by the statistically optimal near-field acoustical holography, and then complex sound field will reconstructed by the wave superposition method with high efficiency and precision. Besides the reconstruction of the patch sound field,the JPNAH has many other virtues.First,compared with the NAH, the JPNAH performs better in the low frequency range.Second,using the JPNAH,it is possible to achieve a real-time mapping of the complex sound field.Numerical simulations were performed based on a single-pulse-ball model;and also motor experiments were carried out in a semi-anechoic chamber.The results of numerical simulations and experiments show that the exterior sound field of the radiators can be reconstructed accurately by JPNAH.The results also show that the JPNAH can be used to reconstruct the sound field radiated from a complex sound source.