43.58.Ls Acoustical lenses and microscopes
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B.Sh. Perkal’skis, V.L. Larin, M.F. Konosheidov “Lens for sound waves in air” Sov. Phys. Usp. 15 513–514 (1973)
43.58.Ls, 43.28.Bj (all)
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B.Sh. Perkal’skis, V.L. Larin “Lecture demonstrations of acoustic phase zone plates” Sov. Phys. Usp. 11 771–773 (1969)
43.58.Ls, 43.10.Sv, 01.50.My (all)
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