Acoustical and Physico-chemical properties of liquid mixtures and solutions are playing very important role in understanding the nature of intermolecular interactions. Excess function; have been used as a qualitative and quantitative guide to predict the extent of complex formation in binary liquid mixtures. In this paper evaluated experimental densities (ρ) and ultrasonic velocities (U) for the pure liquids and liquid mixture of Cyclopentyl methyl ether and Methyl acrylate using bicapillary pycnometer and single frequency variable path over the different concentration range at 298.15 K Temprature. The observed data had been utilized to calculate various acoustical parameters like isentropic compressibility (K_S), Intermolecular free length (L_f) and acoustic impedance (Z). Excess ultrasonic velocities (U^E), Excess Isentropic compressibility (K_S ^E), Excess Intermolecular free length (L_f ^E) and Excess acoustic impedance (Z^E) were calculated using the measured values and correlated with the Redlich-Kister polynomial equation. The observed variations of the properties for the above mixture conclude that the interactions between unlike molecules predominate over the dissociation effects in the individual components. It is also evident that the presence of strong interactions between unlike molecules is predominant and characterized by the deviations of Excess acoustical parameters.