Enhancing the sound absorption of small-scale 3D printed acoustic metamaterials based on Helmholtz resonators

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Acoustic metamaterials have recently become of interest for their ability to attenuate sound by breaking the massdensity law. In this paper, acoustic metamaterials based on Helmholtz resonators and capable of attenuating sound up to 30 dB are fabricated for sound absorption applications in the smallscale. The proposed metamaterials are subwavelength at a factor of λ/12 with respect to the lateral dimension of the units. The directional response due to the position of the acoustic source on the sound attenuation provided by the metamaterial is investigated by controlling the location of a loudspeaker with a robot arm. To enhance and broaden the absorption bands, structural modifications are added such that overtones are tuned to selected frequencies, and membranes are included at the base of the resonators. This design is made possible by innovative 3D printing techniques based on stereolithography and on the use of specific UV-curable resins. These results show that these designs could be used for sound control in small-scale electroacoustic devices and sensors.
LanguageEnglish
Pages7949-7955
Number of pages7
JournalIEEE Sensors Journal
Volume18
Issue number19
Early online date13 Aug 2018
DOIs
Publication statusPublished - 1 Oct 2018

Fingerprint

Helmholtz resonators
sound transmission
Metamaterials
Resonators
Acoustics
Acoustic waves
acoustics
Stereolithography
Loudspeakers
robot arms
electroacoustics
Printing
Absorption spectra
loudspeakers
Resins
Robots
printing
Membranes
resins
lithography

Keywords

  • acoustic metamaterials
  • Helmholtz resonators
  • overtones
  • membranes
  • sound absorption
  • stop bands
  • 3D printing

Cite this

@article{5c5595f2aad64cf48f4bcb592fe7795d,
title = "Enhancing the sound absorption of small-scale 3D printed acoustic metamaterials based on Helmholtz resonators",
abstract = "Acoustic metamaterials have recently become of interest for their ability to attenuate sound by breaking the massdensity law. In this paper, acoustic metamaterials based on Helmholtz resonators and capable of attenuating sound up to 30 dB are fabricated for sound absorption applications in the smallscale. The proposed metamaterials are subwavelength at a factor of λ/12 with respect to the lateral dimension of the units. The directional response due to the position of the acoustic source on the sound attenuation provided by the metamaterial is investigated by controlling the location of a loudspeaker with a robot arm. To enhance and broaden the absorption bands, structural modifications are added such that overtones are tuned to selected frequencies, and membranes are included at the base of the resonators. This design is made possible by innovative 3D printing techniques based on stereolithography and on the use of specific UV-curable resins. These results show that these designs could be used for sound control in small-scale electroacoustic devices and sensors.",
keywords = "acoustic metamaterials, Helmholtz resonators , overtones, membranes, sound absorption, stop bands, 3D printing",
author = "Cecilia Casarini and Ben Tiller and Carmelo Mineo and MacLeod, {Charles N.} and Windmill, {James F. C.} and Jackson, {Joseph C.}",
year = "2018",
month = "10",
day = "1",
doi = "10.1109/JSEN.2018.2865129",
language = "English",
volume = "18",
pages = "7949--7955",
journal = "IEEE Sensors Journal",
issn = "1530-437X",
number = "19",

}

TY - JOUR

T1 - Enhancing the sound absorption of small-scale 3D printed acoustic metamaterials based on Helmholtz resonators

AU - Casarini, Cecilia

AU - Tiller, Ben

AU - Mineo, Carmelo

AU - MacLeod, Charles N.

AU - Windmill, James F. C.

AU - Jackson, Joseph C.

PY - 2018/10/1

Y1 - 2018/10/1

N2 - Acoustic metamaterials have recently become of interest for their ability to attenuate sound by breaking the massdensity law. In this paper, acoustic metamaterials based on Helmholtz resonators and capable of attenuating sound up to 30 dB are fabricated for sound absorption applications in the smallscale. The proposed metamaterials are subwavelength at a factor of λ/12 with respect to the lateral dimension of the units. The directional response due to the position of the acoustic source on the sound attenuation provided by the metamaterial is investigated by controlling the location of a loudspeaker with a robot arm. To enhance and broaden the absorption bands, structural modifications are added such that overtones are tuned to selected frequencies, and membranes are included at the base of the resonators. This design is made possible by innovative 3D printing techniques based on stereolithography and on the use of specific UV-curable resins. These results show that these designs could be used for sound control in small-scale electroacoustic devices and sensors.

AB - Acoustic metamaterials have recently become of interest for their ability to attenuate sound by breaking the massdensity law. In this paper, acoustic metamaterials based on Helmholtz resonators and capable of attenuating sound up to 30 dB are fabricated for sound absorption applications in the smallscale. The proposed metamaterials are subwavelength at a factor of λ/12 with respect to the lateral dimension of the units. The directional response due to the position of the acoustic source on the sound attenuation provided by the metamaterial is investigated by controlling the location of a loudspeaker with a robot arm. To enhance and broaden the absorption bands, structural modifications are added such that overtones are tuned to selected frequencies, and membranes are included at the base of the resonators. This design is made possible by innovative 3D printing techniques based on stereolithography and on the use of specific UV-curable resins. These results show that these designs could be used for sound control in small-scale electroacoustic devices and sensors.

KW - acoustic metamaterials

KW - Helmholtz resonators

KW - overtones

KW - membranes

KW - sound absorption

KW - stop bands

KW - 3D printing

UR - https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=7361

U2 - 10.1109/JSEN.2018.2865129

DO - 10.1109/JSEN.2018.2865129

M3 - Article

VL - 18

SP - 7949

EP - 7955

JO - IEEE Sensors Journal

T2 - IEEE Sensors Journal

JF - IEEE Sensors Journal

SN - 1530-437X

IS - 19

ER -