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Sound absorption by acoustic microlattice with optimized pore configuration
- Source :
- The Journal of the Acoustical Society of America. 144:EL138-EL143
- Publication Year :
- 2018
- Publisher :
- Acoustical Society of America (ASA), 2018.
-
Abstract
- Sound absorption or dissipation principally involves joint interactions between sound waves, material morphology and the air medium. How these elements work most efficiently for sound absorption remains elusive to date. In this paper, we suggest a fundamental relation concisely cross-linking the three elements, which reveals that optimal sound absorption efficiency occurs when the pore size of the material is twice the thickness of the viscous boundary layer of the acoustic air medium. The study is validated by microlattice materials comprising of well-controlled regular structures that absorb sound in a tunable manner. Optimized material morphology in terms of pore size and porosity is determined to provide a robust guidance for optimizing sound absorbing materials.<br />14 pages, 7 figures
- Subjects :
- Pore size
Condensed Matter - Materials Science
geography
Work (thermodynamics)
geography.geographical_feature_category
Materials science
Acoustics and Ultrasonics
Acoustics
Viscous boundary layer
Materials Science (cond-mat.mtrl-sci)
FOS: Physical sciences
02 engineering and technology
Dissipation
021001 nanoscience & nanotechnology
01 natural sciences
Arts and Humanities (miscellaneous)
0103 physical sciences
0210 nano-technology
Porosity
010301 acoustics
Joint (geology)
Sound (geography)
Sound wave
Subjects
Details
- ISSN :
- 00014966
- Volume :
- 144
- Database :
- OpenAIRE
- Journal :
- The Journal of the Acoustical Society of America
- Accession number :
- edsair.doi.dedup.....1bdcfd85139ddb27e7d53fdc20f24425