A numerical study of the effect of viscothermal losses on an acoustic black hole

Vicente Cutanda Henríquez, José Sánchez-Dehesa

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Abstract

The omnidirectional acoustic absorber introduced in 2010 by Climente et al. [3] is an acoustic analogue of the quantum black hole for airborne sound in two dimensions. It consists of a shell, which acts like a gradient index lens, and an absorbing core both made of periodic distributions of cylindrical rods. The energy dissipation of this acoustic black hole is numerically studied using the boundary element method, showing that the dissipation is due to viscothermal losses in the core, which are greatly enhanced due to the surrounding shell. We also concluded that discrepancies with measurements should be attributed to spurious losses existing in the experimental setup, which play a non-negligible role in the measured losses.

Original languageEnglish
Title of host publicationProceedings of InterNoise20
EditorsJin Yong Jeon
PublisherInstitute of Noise Control Engineering
Publication date23 Aug 2020
Pages5774-5778
ISBN (Electronic)9788994021362
Publication statusPublished - 23 Aug 2020
Event49th International Congress and Exposition on Noise Control Engineering - Virtual event, Seoul, Korea, Republic of
Duration: 23 Aug 202026 Aug 2020
https://internoise2020.org/

Conference

Conference49th International Congress and Exposition on Noise Control Engineering
LocationVirtual event
CountryKorea, Republic of
CitySeoul
Period23/08/202026/08/2020
Internet address
SeriesProceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020

Bibliographical note

Publisher Copyright:
© Proceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020. All rights reserved.

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