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Related Experiment Video

Updated: Feb 20, 2026

Fabrication and Operation of Acoustofluidic Devices Supporting Bulk Acoustic Standing Waves for Sheathless Focusing of Particles

Fabrication and Operation of Acoustofluidic Devices Supporting Bulk Acoustic Standing Waves for Sheathless Focusing of Particles

Published on: March 6, 2016

Focusing phenomenon based on the coupling effect of acoustic waveguide.

Guanjun Yin¹, Ting Zhang², Wei Wang¹

¹Key Laboratory of Ultrasound of Shaanxi Province, School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China.

|October 25, 2017

Summary

Researchers explored acoustic waveguide coupling, demonstrating energy focusing in nested pipe structures. This acoustic wave control has potential applications in frequency-selective devices and transducers.

Keywords:

Cladded waveguide Coupling effect Energy focusing Wave alternating Waveguide structure

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Area of Science:

Acoustics
Waveguide Theory
Energy Focusing

Background:

Acoustic waveguides are crucial for transmitting sound energy.
Understanding wave coupling is essential for advanced acoustic devices.
Previous research has explored wave propagation but not energy focusing in nested structures.

Purpose of the Study:

To investigate the coupling effect in parallel acoustic cladded waveguides.
To extend this coupling effect for energy focusing in nested pipe waveguides.
To demonstrate the feasibility of acoustic energy focusing and its potential applications.

Main Methods:

Numerical simulations of acoustic wave propagation in parallel waveguides.
Experimental fabrication and testing of a nested pipe waveguide structure.
Analysis of wave amplitude, coupling length, and focusing length in relation to frequency and waveguide geometry.

Main Results:

Verified periodic amplitude alternation and a defined coupling length in parallel waveguides.
Demonstrated acoustic energy focusing onto a central waveguide in a nested structure.
Identified a well-defined focusing length dependent on wave frequency.

Conclusions:

The coupling effect in acoustic waveguides can be harnessed for energy focusing.
Nested waveguide structures offer a novel approach to acoustic energy control.
This research opens possibilities for frequency-selective devices, acoustic power switches, and efficient transducers.