The use of acoustic metamaterials to build a broadband sound diffuser

• Autorzy: Rubacha Jarosław

Identyfikatory

DOI

10.21008/j.0860-6897.2024.1.16

• Języki publikacji: EN

Abstrakty

EN

In this article, the author analyses the potential for extending the frequency range of sound diffusion through the use of different structures of acoustics metamaterial cells. The author carried out numerical calculations on various diffusers that consist of slots with Helmholtz resonators connected either in parallel or in series. Through the use of numerical models, the author optimized these structures to achieve a high diffusion coefficient in a wide frequency range. The author compared these results with calculations for a sound diffuser made of slits. Ultimately, the author designed a sound diffuser that is capable of diffusing sound in a broad frequency range.

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: 2024
• Tom: Vol. 35, nr 1
• Strony: art. no. 2024116
• Opis fizyczny: Bibliogr. 10 poz., il. kolor., rys., wykr.

Twórcy

autor

Rubacha Jarosław

• AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Kraków, Poland

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

Bibliografia

• 1. T.J. Cox, P. D’Antonio; Acoustic Absorbers and Diffusers Theory, Design and Application; CRC Press 2017
• 2. A. Pilch; Optimized diffusers for shoe-box shaped performance halls; Appl. Acoust., 2021, 178, 108109; DOI: 10.1016/j.apacoust.2021.108019
• 3. W. Binek, A. Pilch, T. Kamisiński; Direct application of the diffusers’ reflection patterns in geometrical acoustics simulations; Appl. Acoust., 2022, 198, 108949; DOI:10.1016/J.APACOUST.2022.108949.
• 4. T.J. Cox, P. D’Antonio; Acoustic phase gratings for reduced specular reflection; Appl. Acoust., 2000, 60(2), 167-186
• 5. J. Rubacha; Sound diffuser made of acoustic metamaterial: numerical and experimental investigation; Vibrations in Physical Systems, 2021, 32(2), 2021207; DOI: 10.21008/j.0860-6897.2021.2.07
• 6. N. Jiménez, T.J. Cox, V. Romero-García, J.P. Groby; Metadiffusers: Deep-subwavelength sound diffusers; Sci. Rep., 2017, 7, 5389; DOI: 10.1038/s41598-017-05710-5
• 7. Y. Ding, Z. Liu, C. Qiu, J. Shi; Metamaterial with Simultaneously Negative Bulk Modulus and Mass Density; Phys. Rev. Lett., 2007, 99, 093904; DOI: 10.1103/PhysRevLett.99.093904
• 8. J.P. Groby, W. Huang, A. Lardeau, Y. Aurégan; The use of slow waves to design simple sound absorbing materials; J. Appl. Phys, 2015, 117, 124903, DOI: 10.1063/1.4915115
• 9. N. Jiménez, V. Romero-García, V. Pagneux, J.P. Groby; Quasiperfect absorption by subwavelength acoustic panels in transmission using accumulation of resonances due to slow sound; Phys. Rev. B, 2017, 95, 014205; DOI: 10.1103/PhysRevB.95.014205
• 10. J. Rubacha; Analysis of the Possibility of Shaping the Sound Diffusion Coefficient of Diffusers Based on Acoustic Metamaterials; Vibrations in Physical Systems, 2022, 33(2), 2022210; DOI: 10.21008/j.0860-6897.2022.2.10

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).