Low-frequency directional characteristics of a gamelan gong
Samuel David Bellows, Dallin T. Harwood, Kent L. Gee, Timothy Ward Leishman · The Journal of the Acoustical Society of America · 2022
The structural modes of gamelan gongs often have clear impacts on their far-field directivity patterns with the number of directional lobes corresponding to the associated structural mode shapes. Many of the lowest modes produce dipole-like radiation with the dipole moment determined by the positions of the nodal and antinodal regions. Spherical harmonic and multipole expansions facilitate further understanding of the gongs' low-frequency directional characteristics. The expansions also yield practical simplifications to model their radiation.