The developed model is coded to investigate the effectiveness of
MPP construction upon the cylindrical sound field (domain 2). A
point source located at l = 0.02 m, r = 0.17 m, h = 36 is adopted to
drive the sound field. Geometrical parameters and those of the
MPP are listed in Table 1.
The interior sound pressure level without MPP (rigid-walled)
and with MPP treatment (MPP lined on the side wall of the original