This volume is concerned with the theory and practice of experiments designed to measure the speed and absorption of sound in fluids. The results of such experiments are of interest to the researcher primarily for the understanding they provide about the macroscopic and microscopic properties of the fluids in question. In recent years, accurate measurements of the speed of sound in both gases and liquids have been made for the purposes of determining fundamental physical quantities and thermodynamic properties of fluids. Measurements of sound absorption have also contributed significantly to...