Acoustic waveguide demultiplexer based on Fano resonance: Experiment and simulation

A compact acoustic waveguide demultiplexer configuration is studied via finite-element numerical modeling and audio frequency experiments. The demultiplexer consists of a Y-shaped waveguide with a single input and two outputs. The narrow transmission bands created by stubs side-loaded on each output arm lead to selective transmission of certain frequencies. The experimental work characterizes the broadband response along each output arm by using an impulse response method. Finite-element numerical simulations are conducted using COMSOL. The results of the experiment and the simulation are compared to an existing analytic theory.(c) 2022 Author(s).All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY)license (http://creativecommons.org/licenses/by/4.0/).

Automated summary

A compact acoustic waveguide demultiplexer configuration with a Y-shaped waveguide and selective transmission of certain frequencies using stubs on each output arm has been studied through finite-element numerical modeling and audio frequency experiments. The experimental and numerical results are compared with an existing analytic theory.