Publication | Open Access
Speed of sound in pure water as a function of temperature
244
Citations
0
References
1993
Year
Acoustic MethodsOcean AcousticsEngineeringPhysical AcousticPure WaterTemperature MeasurementNoiseTemperature PredictionThermodynamicsOcean AcousticHeat TransferThermoacoustic Heat EngineSound PropagationThermal EngineeringAcoustic AnalysisInternational Temperature ScaleInternational Celsius Temperatures
The study examines how the speed of sound in pure water varies with temperature under the ITS‑90 scale. Using previously published experimental data, the authors fit the speed of sound to a new fifth‑order polynomial valid from 0 to 100 °C under ITS‑90. The shift from the 1968 scale to ITS‑90 is significant, with a 0.026 °C temperature difference at 100 °C corresponding to a 0.022 m/s change in sound speed. Published in the Journal of Acoustics, Society of America.
In view of the adoption of the International Temperature Scale of 1990 (ITS-90), which defines the International Celsius Temperatures, t90, the dependence on temperature of the speed of sound in pure water is examined. Drawing on the experimental data published previously [V. A. Del Grosso and C. W. Mader, ‘‘Speed of Sound in Pure Water,’’ J. Acoust. Soc. Am. 52, 1442–1446 (1972)], it is found that the change from the previous t68 scale is significant. At 100 °C, the difference between the two scales (t68−t90) is 0.026 °C, resulting in a difference of 0.022 m/s for the speed of sound. The speed of sound is fitted to a new fifth-order polynomial applicable over the t90 range 0–100 °C.