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An acoustic metamaterial composed of multi-layer membrane-coated perforated plates for low-frequency sound insulation.
- Source :
-
Applied Physics Letters . 4/13/2015, Vol. 106 Issue 15, p1-5. 5p. 1 Diagram, 3 Graphs. - Publication Year :
- 2015
-
Abstract
- Insulating against low-frequency sound (below 500 Hz) remains challenging despite the progress that has been achieved in sound insulation and absorption. In this work, an acoustic metamaterial based on membrane-coated perforated plates is presented for achieving sound insulation in a low-frequency range, even covering the lower audio frequency limit, 20 Hz. Theoretical analysis and finite element simulations demonstrate that this metamaterial can effectively block acoustic waves over a wide lowfrequency band regardless of incident angles. Two mechanisms, non-resonance and monopolar resonance, operate in the metamaterial, resulting in a more powerful sound insulation ability than that achieved using periodically arranged multi-layer solid plates. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 106
- Issue :
- 15
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 102164692
- Full Text :
- https://doi.org/10.1063/1.4918374