A double porosity material for low frequency sound absorption
Source abstract
Abstract
Abstract This work designs a double porosity material (DPM) composed of two types of pores, i.e., the micro-pore from the porous layer and the meso-pore made by the labyrinthine channel. The both loss mechanisms of two different pores are combined to explore the low frequency sound absorption. All theoretical, numerical and experimental results show that the DPM possesses much lower frequency sound absorption than that of homogenous porous material (HPM) under the same thickness. Both the pressure and particle velocity distributions reveal that the sound absorption peaks are induced by the resonances of the labyrinthine channel and the hybrid resonance between the porous layer and labyrinthine channel respectively. Moreover, unconventional features such as negative bulk modulus and slow sound speed are observed around the resonant frequencies of the DPM. Finally, the absorption tailoring of the DPM with different strategies is investigated.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Acoustic Wave Phenomena Research · Wind and Air Flow Studies · Cellular and Composite Structures
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (31)
Show source-provided references
1. Propagation of sound in porous media
2. Perfect Absorption of sound by rigidly-backed high-porous materials10.3813/AAA.919183 ↗
3. Sound absorption coefficient optimization of gradient sintered metal fiber felts10.1007/s11431-016-6042-1 ↗
4. Theory and experiments on poro-acoustics with inner resonators10.1016/j.wavemoti.2014.11.013 ↗
5. Acoustics of porous media with inner resonators10.1121/1.4824965 ↗
6. Acoustic absorption of solid foams with thin membranes10.1063/1.5025407 ↗
7. Enhancing the absorption coefficient of a backed rigid frame porous layer by embedding circular periodic inclusions10.1121/1.3652865 ↗
8. Enhancing the absorption properties of acoustic porous plates by periodically embedding Helmholtz resonators10.1121/1.4904534 ↗
9. Absorption of sound by porous layers with embedded periodic arrays of resonant inclusions10.1121/1.4824843 ↗
10. Metaporous layer to overcome the thickness constraint for broadband sound absorption10.1063/1.4919844 ↗
11. Multiple slow waves in metaporous layers for broadband sound absorption
12. Design and numerical analysis of syntactic hybrid foam for superior sound absorption10.1016/j.matdes.2018.01.040 ↗
13. Acoustic absorption of porous surfacing with dual porosity10.1016/S0020-7683(98)00091-2 ↗
14. Acoustic wave propagation in double porosity media10.1121/1.1534607 ↗
15. On the use of perforations to improve the sound absorption of porous materials10.1016/j.apacoust.2004.09.008 ↗
16. Biot effects for sound absorbing double porosity materials10.3813/AAA.918538 ↗
17. Ultrathin multi-slit metamaterial as excellent sound absorber: influence of micro-structure10.1063/1.4938735 ↗
18. A multiscale theoretical approach for the sound absorption of slit-perforated double porosity materials10.1016/j.compstruct.2019.110919 ↗
19. Acoustic perfect absorbers via spiral metasurfaces with embedded apertures10.1063/1.5063289 ↗
20. Three-dimensional acoustic sub-diffraction focusing by coiled metamaterials with strong absorption10.1039/C9TC01243E ↗
21. Optimal sound-absorbing structures10.1039/C7MH00129K ↗
22. A tunable sound-absorbing metamaterial based on coiled-up space10.1063/1.5026022 ↗
23. A space-coiled acoustic metamaterial with tunable low-frequency sound absorption10.1209/0295-5075/120/54001 ↗
24. Acoustic metasurface-based perfect absorber with deep subwavelength thickness
25. A thin low-frequency broadband metasurface with multi-order sound absorption
26. Perfect sound absorption of ultra-thin metasurface based on hybrid resonance and space-coiling10.1063/1.5049696 ↗
27. Ultrathin low-frequency sound absorbing panels based on coplanar spiral tubes or coplanar Helmholtz resonators10.1063/1.4895617 ↗
28. Single-channel labyrinthine metasurfaces as perfect sound absorbers with tunable bandwidth
29. Auriault · 2009
30. ISO 10534-2: 1998 Acoustics—Determination of sound absorption coefficient and impedance in impedance tubes—Part 2: Transfer function method first edition.
31. Method for retrieving effective properties of locally resonant acoustic metamaterials10.1103/PhysRevB.76.144302 ↗