Abstract

During the last decade a number of acousticians have investigated the user of close in measurements of the noise of large machines to determine total sound power. This paper reviews the theoretical justification for such procedures and quotes some comparison of results obtained with those found by classical methods. New investigations offer improved methods of better accuracy [J.D. Vrito, Ph.D thesis (Massachusetts Institute of Technology, October 1976) and J.T. Rainey, C.E. Ebbing, and F. Kushner (to be published).]

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