MATEC Web Conf.
Volume 320, 2020V All-Russian Conference of Young Scientists and Specialists “Acoustics of the Environment” (ASO-2020)
|Number of page(s)||7|
|Published online||24 September 2020|
Waveguide insulator – theory and experiment
Bauman Moscow State Technical University, 105005, Moscow Russia
2 Andreyev Acoustics Institute, 117036, Moscow, Russia
* Corresponding author:firstname.lastname@example.org
The theory of sound propagation in waveguides with a system of resonators on the wall is given in [1-2]. The papers present theoretical data showing that the use of a chain of identical Helmholtz resonators on the walls of a waveguide reduces the sound pressure levels effectively not only at the resonant frequency, but also at frequencies which are significantly higher than the resonant frequency. This theory was called by the authors of [1, 2] the theory of waveguide isolation (WI). Nowadays, the decades later, the idea of using a set of identical resonators has been widely developed in creation and research of acoustic metamaterials – artificial structures with unusual wave properties (see for example [3-6]). At the same time, the works [1-2] remained almost unnoticed. This paper is devoted to experimental and numerical verification of the WI theory. The design of the studied WI, a simple experimental setup, the results of the experiment and numerical experiment are described.
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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