期刊
MATERIALS TODAY COMMUNICATIONS
卷 19, 期 -, 页码 68-75出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mtcomm.2018.12.012
关键词
Sound absorption coefficient; Polyamide-12; Additive manufacturing; Acoustic interference; Passive noise cancellation
资金
- UK Department for Transport (DfT) under the Transport Technology Research Innovation [T-TRIG150902]
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.
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