Accession Number : AD0845866

Title :   Development of Simple Equations for Accurate and More Realistic Calculation of the Speed of Sound in Sea Water.

Descriptive Note : Technical rept.,

Corporate Author : SACLANT ASW RESEARCH CENTRE LA SPEZIA (ITALY)

Personal Author(s) : Leroy, C. C.

Report Date : 15 NOV 1968

Pagination or Media Count : 50

Abstract : Many equations for calculating the speed of sound in the sea suffer from a lack of accuracy in spite of their complexity. By taking an appropriate approach in the development of the equation and by limiting the data to be fitted to those that correspond to real sea water conditions, it is found that more simple and more accurate equations can be developed. A survey of the characteristics of all existing sea waters is first made. This leads to a substantial limitation in the existing data to be fitted and suggests the appropriate measurements for further research. Previous methods of formulation are then discussed and a new method presented. To illustrate the advantages of the latter method, two equations formulated in this way are given. One fits Wilson's second equation for sea water to within 0.1 m/s in the domain described, and the other fits Wilson's corresponding data with a better accuracy than does Wilson's equation. (Author)

Descriptors :   *SOUND TRANSMISSION), (*SEA WATER, (*UNDERWATER SOUND, MATHEMATICAL MODELS), VELOCITY, SALINITY, TEMPERATURE, FACTOR ANALYSIS, ITALY, EQUATIONS.

Subject Categories : Physical and Dynamic Oceanography
      Acoustics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE