Sustainable Acoustic Metasurfaces for Sound Control

Paola Gori, Claudia Guattari, Francesco Asdrubali, Roberto De Lieto Vollaro, Alessio Monti, Davide Ramaccia, Filiberto Bilotti and Alessandro Toscano
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Paola Gori: Department of Engineering, University of Roma TRE, Via Vito Volterra 62, Rome 00146, Italy
Claudia Guattari: Department of Engineering, University of Roma TRE, Via Vito Volterra 62, Rome 00146, Italy
Francesco Asdrubali: Department of Engineering, University of Roma TRE, Via Vito Volterra 62, Rome 00146, Italy
Roberto De Lieto Vollaro: Department of Engineering, University of Roma TRE, Via Vito Volterra 62, Rome 00146, Italy
Alessio Monti: Department of Engineering, Niccolò Cusano University, Via Don Carlo Gnocchi 3, Rome 00166, Italy
Davide Ramaccia: Department of Engineering, University of Roma TRE, Via Vito Volterra 62, Rome 00146, Italy
Filiberto Bilotti: Department of Engineering, University of Roma TRE, Via Vito Volterra 62, Rome 00146, Italy
Alessandro Toscano: Department of Engineering, University of Roma TRE, Via Vito Volterra 62, Rome 00146, Italy

Sustainability, 2016, vol. 8, issue 2, 1-10

Abstract: Sound attenuation with conventional acoustic materials is subject to the mass law and requires massive and bulky structures at low frequencies. A possible alternative solution is provided by the use of metamaterials, which are artificial materials properly engineered to obtain properties and characteristics that it is not possible to find in natural materials. Theory and applications of metamaterials, already consolidated in electromagnetism, can be extended to acoustics; in particular, they can be applied to improve the properties of acoustical panels. The design of acoustic metasurfaces that could effectively control transmitted sound in unconventional ways appears a significant subject to be investigated, given its wide-ranging possible applications. In this contribution, we investigate the application of a metasurface-inspired technique to achieve the acoustical insulation of an environment. The designed surface has subwavelength thickness and structuring and could be realized with cheap, lightweight and sustainable materials. We present a few examples of such structures and analyze their acoustical behavior by means of full-wave simulations.

Keywords: noise reduction; transmission coefficient; reflection coefficient; acoustic metamaterials; full wave simulations (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:8:y:2016:i:2:p:107-:d:62751

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