More on the diffraction theory of Schroeder diffusors

The diffraction theory for ’’well‐array’’ sound diffusors as suggested by M. R. Schroeder has been previously derived by this author. Here, the equations are simplified so that one multiplication by a large complex matrix is saved. Further manipulation of the new equations clarifies the relationship to the equations for a locally reacting plane, which are obtained in the limit of zero well width. The equations are also extended to the case of nonzero thickness of the walls separating the wells.