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Solid-state acoustic metamaterial and method of using same to focus sound
Solid-state acoustic metamaterial and method of using same to focus sound
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机译:固态声超材料及其用于聚焦声音的方法
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摘要
A phonemic crystal is made of a first solid medium having a first density and a substantially periodic array of structures disposed in the first medium, the structures being made of a second solid medium having a second density different from the first density. The first medium has a speed of propagation of longitudinal sound waves and a speed of propagation of transverse sound waves, the speed of propagation of longitudinal sound waves being approximately that of a fluid, and the speed of the propagation of transverse sound waves being smaller than the speed of propagation of longitudinal sound waves.
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