DIRECTIVITY CHARACTERISTICS OF NOISE GENERATING STACKS
具有噪音的排气口的辐射指向特性

The paper discusses radiation directivity patterns of noise generating stacks of various simple shapes (rectangular, square, circular). Earlier computation of Wells, R. and Crocker, B. E. is improved with regard to the assumption of baffles. The new formulae predict patterns for a wider region than the half space covered by the earlier computation and agree favorably with published experimental data.