Reconstruction of the sound field radiated from a source in a noisy environment based on three-dimensional scanning measurements

Three-dimensional (3D) scanning measurement method has been successfully applied to the inverse boundary element method (IBEM)-based near-field acoustic holography to improve its measurement efficiency. However, it is based on the assumption that all sources are located on one side of the measurement surface whereas the other side is source free, which may not be fulfilled in practice. In the present paper, the 3D scanning measurement method is further applied in a noisy environment to reconstruct the sound field radiated by a target source. To achieve this goal, the IBEM algorithm is extended to account for the influence of the disturbing sources that are located on the other side of the measurement surface, and the acoustic inputs are acquired by continuous 3D scanning measurement on a closed surface surrounding the target source. An experiment is carried out to demonstrate the effectiveness of the proposed method. Results show that the proposed method can suppress the influence of the disturbing sources and reconstruct the sound field radiated by the target source effectively in the frequency range of interest.