VERY few systematic data exist so far relating to the effect of temperature on ultrasonic velocity in liquids, especially water. Loomis and Hubbard's results1 for the change of ultra-sonic velocity in water and other liquids with rising temperature may be cited as perhaps the only systematic investigations, because earlier experiments2 were carried out under rather unstandard conditions and in a very low region of sonic frequencies and therefore are not reliable. Even Hubbard's data for water are reported for a very limited range of temperature, 0°–40° C., using a sonic interferometer at a frequency of 500 kc. only. The present work extends the knowledge of ultrasonic velocity in water up to a temperature of 70° C., using the method of diffraction of light by ultrasonics at a frequency of 5·7 mc./sec.
Loomis and Hubbard, Phil. Mag., (7), 5, 1177 (1928).
Buss, Ann. Phys., 75, 657 (1924). DÃ¶rsing, Ann. Phys., 25, 227 (1908).
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Solar Energy (1990)
Reports on Progress in Physics (1947)