Evaluation of glycerol speed of sound

The speed of sound in the liquid glycerol was calculated from the wave propagation time measurement in through transmission mode by using a designed acoustical cell. Measurements were carried out at atmospheric pressure and temperatures ranging from 298.47 K to 353.16 K. The proposed approach provided glycerol speed of sound values with experimental uncertainty of 1.9 m.s-1. The data were compared with the values from literature resulting in relative deviations around the range of 0.5%. The data were also used to develop an empirical equation for the calculation of the speed of sound covering the considered temperature range, with standard deviation  =2 m.s-1.