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Title: Asymmetric acoustic transmission in multiple frequency bands

We report both experimentally and numerically that the multi-band device of the asymmetric acoustic transmission is realized by placing two periodic gratings with different periods on both sides of two brass plates immersed in water. The asymmetric acoustic transmission can exist in four frequency bands below 1500 kHz, which arises from the interaction between various diffractions from the two gratings and Lamb modes in the brass plates immersed in water. The results indicate that the device has the advantages of multiple band, broader bandwidth, and simpler structure. Our finding should have great potential applications in ultrasonic devices.
Authors:
 [1] ;  [2] ;  [2] ;  [1] ;  [3]
  1. Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013 (China)
  2. (China)
  3. Laboratory of Modern Acoustics, Institute of Acoustics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093 (China)
Publication Date:
OSTI Identifier:
22486138
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 21; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ASYMMETRY; BRASS; DIFFRACTION; GRATINGS; INTERACTIONS; KHZ RANGE; PERIODICITY; PLATES; TRANSMISSION