The nature of variations of ultrasonic wave velocity(v) and attenuation
constant({\alpha}) with the concentration(c) in aqueous solutions of NaCl, KCl
and CsCl are investigated at room temperature(250C) at 1MHz and 2 MHz wave
frequency. Fourier Spectrum Pulse-Echo (FSPE) technique is used to achieve
better accuracy in measurement, particularly for {\alpha} measurement. In NaCl
and KCl abrupt changes in the values of v and {\alpha} are noticed at
particular solution concentrations whereas, for CsCl almost smooth variation in
v is observed over the whole concentration range for both of the frequencies 1
and 2 MHz . The nature of variation in v and {\alpha} in these solutions are
analyzed in view of other spectroscopic studies. The well-known Jones-Dole
equation that explains the viscosity({\eta}) variation in many electrolyte
solutions, offers satisfactory fits to the experimental velocity variation with
parameter values characteristics of the sample
