Analysis of the possibility of shaping the sound diffusion coefficient of diffusers based on acoustic metamaterials

• Autorzy: Rubacha Jarosław

Identyfikatory

DOI

10.21008/j.0860-6897.2022.2.10

• Języki publikacji: EN

Abstrakty

EN

The article presents the analysis of the possibilities of using acoustic metamaterial to build sound diffusers. The diffusers composed of slots loaded with a curved quarter-wave resonator were investigated. Such solutions induce dispersion and the slow sound effect to increase the effective depth of the quarter-wave resonator. The sound diffusion coefficient was calculated with the use of numerical models of diffusers. Next, obtained results were compared with the Schroeder diffuser. In conclusion, it was shown, that acoustic metamaterials affect the frequency band of the diffuser and the effectiveness of the obtained sound diffusers depend on relative width of slits.

Słowa kluczowe

EN

metamaterial; sound diffusion; diffusion coefficient

PL

metamateriał; dyfuzja dźwięku; współczynnik dyfuzji

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2022
• Tom: Vol. 33, nr 2
• Strony: art. no. 2022210
• Opis fizyczny: Bibliogr. 10 poz., rys., wykr.

Twórcy

autor

Rubacha Jarosław

• AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Kraków, Poland

• https://orcid.org/0000-0001-7624-8879

Bibliografia

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• 5. N. Jiménez, T.J. Cox, V. Romero-García, J.P. Groby; Metadiffusers: Deep-subwavelength sound diffusers; Scientific Reports 2017, 7, 5389.
• 6. J. Rubacha; Sound diffuser made of acoustic metamaterial: numerical and experimental investigation; Vibrations in Physical Systems 2021, 32(2), 2021207.
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• 8. N. Jiménez, W. Huang, V. Romero-García, V. Pagneux, J.-P. Groby; Ultra-thin metamaterial for perfect and quasi-omnidirectional sound absorption; Appl. Phys. Lett. 2016, 109 (12), 121902.
• 9. M.L. Munjal; Acoustics of Ducts and Mufflers, 2 ed.; Wiley: Chichester, UK, 2014.
• 10. T. Cambonie, F. Mbailassem, E. Gourdon; Bending a quarter wavelength resonator: Curvature effects on sound absorption properties; Applied Acoustics 2018, 131, 87-102.

Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).