Angular spectrum method: Difference between revisions

Revision as of 01:34, 1 December 2020

Revision as of 06:26, 16 August 2021

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# Sampling the complex (real and imaginary) components of a pressure field over a grid of points lying in a cross-sectional plane within the field.

# Taking the 2D-[[Fast Fourier transform|FFT]] (two dimensional [[Fourier transform]]) of the pressure field contour - this will decompose the field into a 2D "angular spectrum" of component plane waves each traveling in a unique direction.

# Multiplying each point in the 2D-FFT by a propagation term which accounts for the phase change that each plane wave will undergo on its journey to the prediction plane.

# Taking the 2D-IFFT (two dimensional inverse [[Fourier transform]]) of the resulting data set to yield the field contour over the prediction plane.