Sound velocities and B/A in fluorocarbon fluids and in several low density solids

Sound velocities were obtained in six fluorocarbon fluids, two syntactic foams, and two low density solids. Temperature and pressure ranges considered were 0 °–30 °C and 1–700 kg/cm2. An equation was fit to the data. This equation was then differentiated to permit the calculation of the nonlinear parameter, B/A, and Rao’s constant. Comparisons of these data with those obtained by other authors are made wherever possible. Very low sound velocities are observed in fluorocarbon fluids and these fluids have the highest values of B/A reported thus far.