Determining the Concentration of a Solution by the Experimental Characterization of its Acoustic Parameters.

A fluid is an isotropic medium that is to say that all of its physical properties are identical in all aspects. On the contrary, when we consider the acoustic aspect, the parameters which characterize a solution are completely different and depend on the type and the composition of that solution. In this study we show that the acoustic parameters (ultrasonic velocity, compressibility, impedance and attenuation) of saline solution are based on the salt concentration. The results are very clear, very little change in its concentration leads to a variation of these parameters. The database thus constituted can, by propagating an ultrasonic signal in a solution of unknown concentration, determine the exact concentration of salt in that solution. The result can be achieved with any type of solution just by providing its data base of its acoustic aspect. [ABSTRACT FROM AUTHOR]