Abstract: The orthogonal spherical wave source boundary point is proposed to the acoustic shape sensitivity of any point in an acoustic field. In the method, the problems of the non-uniqueness and singularity caused by using the boundary element method are avoided, and the numerical calculation becomes easier. Furthermore, the nearfield acoustic holography is used to reconstruct the surface normal velocity and its differ-ence on the source surface in the acoustic shape sensitivity analysis, which avoids the straightforward calculation of those acoustic qualities. The numerical simulations on some typical sources validate the feasibility and correctness of the proposed method.

Key words: Acoustic shape sensitivity, Boundary point, Nearfield acoustic holography, Spherical wave