基于FFT变换的平面瞬态近场声全息

he formula for reconstructing the planar transient sound fields from the planar source is deduced in this paper. By adding one dimension Fourier transform of time to the stationary nearfield acoustical holography, the spectrum of the measured pressure can be obtained corresponding to each frequency, then the pressure spectrum on the source surface can be reconstructed by the spectrum on the measurement surface frequency by frequency, and finally the desired transient pressure on the source surface can be obtained by using inverse transform of the reconstructed spectrum. The numerical simulations prove the feasibility of planar transient nearfield acoustical holography based on fast Fourier transform.