The object of these experiments was to test the transmission of solid acoustic wave filters with the view to the establishment of empirical formulas to be used in future designs. The length of sections, the conductivity into the branch lines, and the volume of the branch lines were altered in the case of low-frequency-pass-filters. In all cases the variations produced effects that are analogous to those found with acoustic wave filters in fluids. But more than this, so far as a test has been made, the cut-off frequency is in agreement with the Stewart theory for fluids. This means that the phenomena is caused almost exclusively by the longitudinal waves. Moreover, recurring bands were found in high frequencies and these seemed to be in accord with the more extended theory of Stewart concerning the presence of such additional bands. The conclusion in that the acoustic wave filters in solids can be designated on the basis of the formulas obtained for fluids.
Proceedings of the Iowa Academy of Science
©1925 Iowa Academy of Science, Inc.
Olson, H. F.
"Quantitative Measurements in the Transmission in Solid Acoustic Wave Filters with Varying Physical Dimensions,"
Proceedings of the Iowa Academy of Science, 32(1), 381-381.
Available at: https://scholarworks.uni.edu/pias/vol32/iss1/84