Acoustic Absorption in Seawater

Calculates the acoustic absorption of seawater in dB/km.

This function calculates the acoustic absorption of seawater in dB/km following Kinsler et al, "Fundamentals of Acoustics, Fourth Edition," pp. 226-228. The function can be called with the only argument being frequency, in which case "standard" oceanographic parameters are used. However, depth, temperature, salinity and pH can also be input arguments. The only output is the absorption of seawater, in dB/km.