Abstract
Surfaces consisting of periodic arrangements of resonators can be considered to be locally reacting, and thus have a limited range of angles for which they can achieve high absorption. In particular, achieving significant absorption in a wide angle range becomes more difficult in the region approaching grazing incidence. For some applications such as reflection control in disproportionate rooms, reflection control at large angles can be desirable. In this work, it is shown how the angle range of high absorption of periodic surfaces of resonators can be significantly extended by adding a multilayered media above them. Two cases are demonstrated, one that considers a single-frequency performance and another that considers the average performance over an octave band. The behavior of the surfaces is estimated analytically using the transfer matrix method and numerically using the finite element model.
Original language | English |
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Title of host publication | Proceedings of the 24th International Congress on Acoustics |
Number of pages | 8 |
Publication date | 2022 |
Publication status | Published - 2022 |
Event | 24th International Congress on Acoustics - Hwabaek International Convention Center, Gyeongju, Korea, Republic of Duration: 24 Oct 2022 → 28 Oct 2022 Conference number: 24 https://ica2022korea.org |
Conference
Conference | 24th International Congress on Acoustics |
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Number | 24 |
Location | Hwabaek International Convention Center |
Country/Territory | Korea, Republic of |
City | Gyeongju |
Period | 24/10/2022 → 28/10/2022 |
Internet address |
Keywords
- Oblique incidence absorption
- Absorbing metasurface
- Multilayered media