Acoustic waveguide demultiplexer based on Fano resonance: Experiment and simulation

• Main Authors: Giuntini, R.J (Author), Laverde, A. (Author), Lopez, J. (Author), Robertson, W.M (Author), Vazquez, C. (Author)
• Format: Article
• Language: English
• Published: American Institute of Physics Inc. 2022
• Subjects: Acoustic waveguides; Audio acoustics; Audio frequencies; Demultiplexers; Demultiplexing; Fano resonances; Finite element method; Finite element numerical models; Impulse response; Model frequencies; Numerical models; Resonance; Selective transmissions; Single input; Transmission band; Waveguides; Y-shaped
• Online Access: View Fulltext in Publisher
• ISBN: 21583226 (ISSN)
• DOI: 10.1063/5.0087034

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. © 2022 Author(s).