Equivalent source method near-field acoustical holography method based on sparse Bayesian focusing

The invention discloses an equivalent source method near-field acoustical holography method based on sparse Bayesian focusing. The method comprises the following steps: arranging M microphones in a sound source near-field radiation area so as to measure and obtain holographic surface sound pressure pH; arranging an equivalent source surface with Q nodes on one side, closer to the sound source, of the target test surface; establishing a sound field transfer matrix of each equivalent source on an equivalent source surface and a holographic surface measuring point acquisition sound pressure pH by using an equivalent source method near-field acoustical holography model, and solving an intensity coefficient q of each equivalent source by using a sparse Bayesian focusing algorithm; a sound field transfer matrix between the sound pressure of N measuring points of a target surface and each equivalent source on an equivalent source surface is established by using an equivalent source method near-field acoustical holog