Abstract
A thin rigid vibrating circular disk with constant-pressure distribution on its surface in an infinite soft baffle corresponds mathematically to the solution of the wave equation with homogeneous Dirichlet boundary conditions. Its characteristics may thus be determined by the evaluation of integrals. The velocity distribution on the disk has been found for various sizes and is compared with those for a disk in an infinite rigid baffle [V. Mangulis, Tech. Rept. TRG-142-TN-64-2 (1964)]. The impedance and radiation pattern is given for various disks (ka<2) and compared with the corresponding quantities for the soft- and rigid-baffle constant-velocity disk as well as with the rigid-baffle constant-pressure disk. The radiation characteristics for the same type of baffle are similar and may be estimated for the constant-velocity disk from the constant-pressure disk for other shapes of radiators. [Hudson Labs. Columbia Univ. Informal Doc. No. 54.] [Work supported by the U. S. Office of Naval Research.]
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