B. Oakley, D. Hanna, M. Shillor and G. Barber

Polynomial expressions for the speed of sound as a function
of pressure for sixty eight different organic liquids are presented
in tabular form. These expressions are based upon the experimental
results reported by many different researchers. For some
common liquids, such as benzene, hexane, ethanol, and carbon
tetrachloride, the results of as many as five different researchers
are reported. These results sometimes vary widely‹far more than
would be expected from calculated experimental uncertainties. An
analysis is presented of how well pressure-dependent polynomials fit
the experimental data when the number of coefficients is increased.
The amount of error in the polynomial fit is also explored when both
pressure and temperature dependencies are present. Lastly, differences
between ultrasonic and Brillouin scattering experimental results are discussed.