AMCA 301:2014

Changes include the following items: 1.Removal of end reflection corrections from the generalized and specific methods. 2.Revised the treatment of the blade passage frequency in both the generalized and specific methods. 3.Removal of the bandwidth term from generalized sound power, resulting in complete agreement with the specific sound power method. 4.Clarification of interpolation and extrapolation for geometrically similar fans. 5.Clarification of interpolation and extrapolation for non-geometrically similar fans. 6.Addition of spherical sones. 7.Allow calculation of spherical and hemispherical sones, as well as A-weighted sound power from full or 1/3 octaves.