A hybrid sound source identification method with wave superposition algorithm and acoustic holography based on source pre-estimation

To solve the problem of ghost sources in the noise source identification,a hybrid method with the wave superposition algorithm and acoustic holography based on pre-estimating the sources' positions was proposed.The sources' positions are pre-estimated with beam-forming algorithm,and source strengths at the pre-estimated positions are figured out with the wave superposition method.Then,the sound pressure of the full holography plane is constructed with the source strengths,and the sound pressure of the reconstruction plane is re-computed with the acoustic holography method.The simulations and experiments were carried out,the sound pressures of the ghost sources produced by the beam-forming algorithm were reduced greatly with the proposed method.The results indicate that the side lobe effect can be restrained,and the sources can be identified more correctly with this method.