Acoustic Properties of Seawater at Subzero Temperatures Phase I: Experiment Design.
Abstract
Field experiments have indicated that transmissions of acoustic signals in seawater at or near its freezing point are subject to larger attenuation than predicted by existing theory. If verified, this effect should be of paramount importance to investigators operating acoustic devices in polar seas and cold deep water environments. A survey of the literature has failed to show previous experimental or theoretical studies for this temperature regime in seawater. A preliminary experiment was undertaken to (a) demonstrate the reproducibility of the field results in the laboratory; (b) design an acoustic experiment to measure the magnitude of the effect; (c) determine the cause of the anomaly; and (d) provide (at least empirical) equations to predict acoustic absorption/attenuation in cold seawater environments. This document reports the results of the preliminary study of items (a) and (b) above. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 15, 1977
- Accession Number
- ADA042753
Entities
People
- E. A. Pence
- R. E. Bunney
Organizations
- University of Washington