Abstract
A model of acoustic diodes is realized by a thin brass plate with single-sided periodical grating structure immersed in water and studied both numerically and experimentally. The unidirectional transmission of acoustic waves is identified in two different frequency ranges, which can be systematically controlled by adjusting the sizes of the structural units. The results indicate that the acoustic diodes have the advantages of tunable frequency range, broader bandwidth, and simple structure as well as being easy to be achieved. The remarkable unidirectional transmission effect has great potential applications in ultrasonic devices, such as acoustic rectifiers, acoustic diodes, and related fields.
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