Author_Institution :
Research Laboratories Division, Bendix Aviation Corp., Detroit, Mich.
Abstract :
Various analog situations in acoustics and electromagnetic waves are described. Certain higher order modes of airborne sound waves in tubes possess a transverse or polarized nature, and electromagnetic properties such as cutoff effects, polarization rotation, and circular polarization can be shown for these sound waves. Externally-guided sound waves, similar to radio waves guided by a dielectric rod, are also discussed, as are superdirective acoustic and electromagnetic arrays, space-frequency equivalence in arrays, and experiments in wave diffraction.
