Two-dimensional water acoustic waveguide based on pressure compensation method

The Review of Scientific Instruments
Mingye ZhengGengkai Hu

Abstract

A two-dimensional (2D) waveguide is a basic facility for experiment measurement due to a much more simplified wave field pattern than that in free space. A waveguide for airborne sound is easily achieved with almost any solid plates. However, the design of a 2D water acoustic waveguide is still challenging because of unavailable solids with a sufficient large impedance difference from water. In this work, a new method of constructing a 2D water acoustic waveguide is proposed based on pressure compensation and has been verified by numerical simulation. A prototype of the water acoustic waveguide is fabricated and complemented by an acoustic pressure scanning system; the measured scattered pressure fields by air and aluminum cylinders both agree quite well with numerical simulations. Most acoustic pressure fields within a frequency range 7 kHz-15 kHz can be measured in this waveguide when the required scanning region is smaller than the aluminum plate area (1800 mm × 800 mm).

References

Jul 21, 2011·Physical Review Letters·Bogdan-Ioan PopaSteven A Cummer
Mar 13, 2013·Scientific Reports·Weiwei KanJianchun Cheng
May 18, 2013·Physical Review Letters·Yangbo XieSteven A Cummer
Sep 23, 2014·The Journal of the Acoustical Society of America·Haijing SuGengkai Hu
Jul 3, 2016·The Journal of the Acoustical Society of America·Bogdan-Ioan PopaMatthew D Guild
Apr 8, 2017·Scientific Reports·Yafeng BiJun Yang
Jun 18, 2017·The Journal of the Acoustical Society of America·Xiaoshi SuPreston S Wilson

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