POLYNOMIAL EXPRESSIONS FOR THE COEFFICIENT OF NONLINEARITY BETA AND BETA/(PC SUPER 5)1/2 FOR FRESH WATER AND SEAWATER

Authors
  1. Cotaras, F.D.
  2. Morfey, C.L.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Southampton Univ, Southampton (England) Inst of Sound and Vibration Research
Abstract
In this Letter, polynomial expressions are presented for the coefficient of nonlinearity Bata for both seawater and fresh water. The seawater relations are for salinities of 30-40 ppt, temperatures of 0-40C, and pressures of 1-800 bars absolute. The fresh water relations are for temperatures of 0-90C and pressures of 1-1000 bars absolute. Also presented are polynomial expressions for the term A=Beta/(PC Super 5)1/2, which arises in nonlinear geometrical acoustics. The precision of the fts of the polynomials to the underlying data is better than 1 ppt in all cases. However, the uncertainty in the seawater Beta relation is + or - 3% for realistic ocean temperatures and pressures. An uncertainty estimate was not obtained for the fresh water Beta relation.
Date of publication
26 Mar 1993
Number of Pages
4
Reprinted from
J Acoustical Society of America, vol 94, no 1, 1993, p 585-588
DSTKIM No
94-01243
CANDIS No
136937
Format(s):
Hardcopy;Originator's fiche received by DSIS

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