In-parallel resonators to increase the absorption of subwavelength acoustic absorbers in the mid-frequency range
| Autor: | Yves Aurégan, Maaz Farooqui |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Absorption (acoustics) Materials science lcsh:Medicine Article 03 medical and health sciences Resonator 0302 clinical medicine Optics Engineering Mid-frequency Tube (fluid conveyance) lcsh:Science Range (particle radiation) Multidisciplinary business.industry lcsh:R Acoustics Acoustic absorption Applied physics 030104 developmental biology lcsh:Q sense organs business Single degree of freedom 030217 neurology & neurosurgery Beam (structure) |
| Zdroj: | Scientific Reports Scientific Reports, Vol 9, Iss 1, Pp 1-6 (2019) |
| ISSN: | 2045-2322 |
| Popis: | The acoustic effects of in-parallel resonators is compared to the behavior of a classical single degree of freedom resonator for which the resistance and the mass are in series. In-parallel resonators serve to enhance the acoustic absorption for mid-frequencies thereby extending the active frequency range of perfect acoustic absorbers. Two implementations of these in-parallel absorbers are presented and investigated experimentally as well as numerically. In the first demonstration, the resistance is a perforated plate with a wiremesh and the oscillating mass is the air that fills a tube passing through the plate. The second implementation consists of a thin flexible beam that oscillates and where the resistance is due to the micro-slit resulting from the cutting of the beam. |
| Databáze: | OpenAIRE |
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