Approximations for Short-Range Shallow-Water Sound Transmission
Abstract
A knowledge of the sound field of a low-frequency shallow-water sound source is useful in determining the sweep widths of an acoustic minesweeper and in adjusting the sensitivity of acoustic mines. Unfortunately, exact theory is at present of little practical utility, not only because of the cumbersome nature of the theoretical result, but, more important, because of uncertainty about the appropriate acoustic properties of the bottom in the area where the prediction is desired. Thus, in practice there is little recourse but to estimates based on guesses and approximate considerations. The above examples seem to show that the simple approximate method outlined here will provide at least a rough estimate of the losses at short ranges from a shallow water source. Until a workable exact theory is developed in terms of acoustic bottom parameters measurable in the field, it is believed that we will have to be content with such approximations for that great majority of bottoms that are not simple media. An estimate of the real validity of the approximations must await additional checks with field data.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 09, 1952
- Accession Number
- AD1218806
Entities
People
- R. J. Urick
Organizations
- United States Naval Research Laboratory