The following are the significant results of modern researches in ultrasonics with regard to their contributions to theoretical and applied physics. Precision velocity measurements in gases, made over wide frequency ranges by means of the Pierce interferometer serve experimentally to substantiate the kinetic theory of gases; such measurements in liquids, made either by the interferometer, diffraction spectra, or visibility method, offer an independent and exact means for calculation of important physical constants of the liquids, and through detection of velocity dispersion, suggest a point of attack for investigation of liquid structure. Sound field amplitude photographs afford precise measurements of ultrasonic absorption in liquids. Certain physical constants of particular solids can be measured. Industrial applications are mentioned.
Proceedings of the Iowa Academy of Science
© Copyright 1939 by the Iowa Academy of Science, Inc.
Corey, Victor B.
"Present Role of Ultrasonic Waves in Physics,"
Proceedings of the Iowa Academy of Science: Vol. 46:
, Article 87.
Available at: https://scholarworks.uni.edu/pias/vol46/iss1/87