1. Multi-band asymmetric acoustic transmission in a bended waveguide with multiple mechanisms
- Author
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Shouqi Yuan, Jian-ping Xia, Hong-xiang Sun, Xin-lei Ding, and Yu-lei Huang
- Subjects
Materials science ,Physics and Astronomy (miscellaneous) ,business.industry ,Band gap ,Acoustics ,Bandwidth (signal processing) ,Physics::Optics ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Acoustic transmission ,01 natural sciences ,500 kHz ,Radio spectrum ,Rod ,Multi band ,Condensed Matter::Superconductivity ,0103 physical sciences ,Optoelectronics ,Ultrasonic sensor ,010306 general physics ,0210 nano-technology ,business - Abstract
We report the realization of a multi-band device of the asymmetric acoustic transmission by placing a phononic crystal inside a bended waveguide immersed in water, as determined both experimentally and numerically. The asymmetric acoustic transmission exists in three frequency bands below 500 kHz induced by multiple mechanisms. Besides the band gap of the phononic crystal, we also introduce the deaf mode and interaction between the phononic crystal and waveguide. More importantly, this asymmetric transmission can be systematically controlled by mechanically rotating the square rods of the phononic crystal. The device has the advantages of multiple band, broader bandwidth, and adjustable property, showing promising applications in ultrasonic devices.
- Published
- 2016