Acoustic energy flow in high symmetry crystals.
Fauth, Herbert Carl.
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The determination-, of elastic: properties, of : crystals :by sound velocity measurements is: facilitated by use -.of :'ai perturbation solution, to the: equations of motion for: sound waves propagating in. the crystals:. . Transformation, equations can relate the solution for.' arbitrary porpagat ion direction to an established crystal, coordinate system. A, method of calculating the acoustic: components of the energy; flow vector is developed for several, high symmetry crystal-classes . The validity of this- method 1st herein- confirmed and 'results are presented which are consistent, with experimental 1 data. A modern desk calculator was employed: to determine . solutions for hexagonal,, cubic: and tetragonal: crystals. .