Calculators of Water Properties
Several calculators are published on the National Physical Laboratory website [www.npl.co.uk]. Of immediate relevance are the following.
Speed of sound in pure water [http://resource.npl.co.uk/acoustics/techguides/soundpurewater/]
Speed of sound in seawater [http://resource.npl.co.uk/acoustics/techguides/soundseawater/]
Absorption of sound in water [http://resource.npl.co.uk/acoustics/techguides/seaabsorption/]
Detailed source references are given on the associated webpages. Parameters to be specified by the user include temperature, pressure, salinity, and frequency, as appropriate. Limits of applicability fo the respective models are given.