The invention provides a near-field
acoustical holography reconstruction method based on the Fourier transformation and
source strength simulation technology. The near-field
acoustical holography reconstruction method based on the Fourier transformation and
source strength simulation technology comprises the steps that continuous simple sources are arranged on a rectangular
virtual source surface, and a
source strength function is a three-dimensional
free space Green function; double Fourier
series expansion is carried out on an
unknown source strength density function, and a
sound pressure expression is deduced; expressions of the
sound pressure on measuring points on a holographic surface are deduced through quick Fourier transformation and inverse transformation calculation, and a non-homogeneous linear equation set which uses a Fourier
series expansion coefficient as an unknown term and the
sound pressure as a constant term is formed through arrangement; the Fourier
series expansion coefficient is obtained by solving the non-homogeneous linear equation set through a
generalized inverse matrix, the Fourier series expansion coefficient is substituted into a reconstruction formula in a back substitution mode, the expression of the sound pressure on any
field point in a
radiation field is obtained, and reconstruction and prediction of the whole space
sound field are achieved. According to the near-field
acoustical holography reconstruction method based on the Fourier transformation and source strength
simulation technology, implementation is easy, the calculating speed is high, limitation cannot be caused by the limited hole
diameter, and the near-field acoustical
holography reconstruction method is applicable to
sound sources with any shapes.