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Abstract
Acoustic products are primarily designed for broadband acoustic absorption. However, frequency-dependent acoustic absorption featuring passive design-based solutions are necessary to combat the growing noise pollution. Accordingly, this research investigates the targeted creation of sound absorption as a function of geometry utilising the principle of Acoustic Interference (AI). A methodology to design freeform geometries that can create targeted acoustic absorption is presented. The effectiveness of this methodology is then experimentally validated while quantifying the influence of length, diameter and geometry orientation. The results establish that AI has the potential to create ‘near perfect’ sound absorption that can be customised depending on the source frequency. The design freedom revealed by this study allows the exploitation of freeform geometries as passive high-efficiency sound absorbing devices.Citation
Arjunan, A. (2019) Acoustic absorption of passive destructive interference cavities, Materials Today Communications, 19(June) pp68-75Publisher
ElsevierJournal
Materials Today CommunicationsAdditional Links
https://www.sciencedirect.com/science/article/pii/S2352492818302757Type
Journal articleLanguage
enISSN
2352-4928ae974a485f413a2113503eed53cd6c53
10.1016/j.mtcomm.2018.12.012
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