2021
DOI: 10.1016/j.apacoust.2020.107901
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Microperforated Panel and deep subwavelength Archimedean-inspired spiral cavities for multi-tonal and broadband sound absorption

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Cited by 26 publications
(10 citation statements)
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“…High-efficiency acoustic metamaterials have emerged to provide an alternative way to develop novel absorbers, due to the resonance modes of these structures at lower frequencies 28 , 29 . Perforated panel absorbers have been developed to provide a robust fibre-free alternative to conventional sound absorption materials relying on the perforation of a plate positioned in front of a rigid back wall with an air cavity between them, to broaden the absorbed frequency bandwidth 30 36 . Though these perforated sound absorbers may overcome some of the inherent disadvantages of porous materials-based sound absorbers 36 , their absorption performance is static and limited at a certain frequency range, and more importantly, since their performance is highly dependent on the geometrical properties, low-frequency absorption can be achieved only with large and unfeasible thicknesses 37 .…”
Section: Introductionmentioning
confidence: 99%
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“…High-efficiency acoustic metamaterials have emerged to provide an alternative way to develop novel absorbers, due to the resonance modes of these structures at lower frequencies 28 , 29 . Perforated panel absorbers have been developed to provide a robust fibre-free alternative to conventional sound absorption materials relying on the perforation of a plate positioned in front of a rigid back wall with an air cavity between them, to broaden the absorbed frequency bandwidth 30 36 . Though these perforated sound absorbers may overcome some of the inherent disadvantages of porous materials-based sound absorbers 36 , their absorption performance is static and limited at a certain frequency range, and more importantly, since their performance is highly dependent on the geometrical properties, low-frequency absorption can be achieved only with large and unfeasible thicknesses 37 .…”
Section: Introductionmentioning
confidence: 99%
“…Perforated panel absorbers have been developed to provide a robust fibre-free alternative to conventional sound absorption materials relying on the perforation of a plate positioned in front of a rigid back wall with an air cavity between them, to broaden the absorbed frequency bandwidth 30 36 . Though these perforated sound absorbers may overcome some of the inherent disadvantages of porous materials-based sound absorbers 36 , their absorption performance is static and limited at a certain frequency range, and more importantly, since their performance is highly dependent on the geometrical properties, low-frequency absorption can be achieved only with large and unfeasible thicknesses 37 . Considering the drawbacks of the current solutions, a demand for alternative low-cost and effective materials, that pose no threat to health are required.…”
Section: Introductionmentioning
confidence: 99%
“…By choosing different parameters of the structures, the hybrid sound absorber was designed to achieve low-frequency broadband sound absorption in the frequency range between 550–1650 Hz and 380–1250 Hz. 55 …”
Section: Acoustic Metamaterialsmentioning
confidence: 99%
“…Metamaterials have also found application as sound absorbers, benefiting from the occurrence of resonance modes of these structures at low frequencies 11 .Micro-perforated panels (MPPs) predominantly, have been established as suitable alternatives to composite materials, due to their broadband absorption performance 12,13 , benefiting from the geometrical arrangement of their perforations.The most prominent limitation of MPPs though is that their sound absorption performance is static and constrained to specific frequencies.…”
Section: Introductionmentioning
confidence: 99%