Experimental and numerical studies on the design of a sonic crystal window
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2017-05-15 |
| Journal | Journal of Vibroengineering |
| Authors | Hsiao Mun Lee, Kian Meng Lim, Heow Pueh Lee |
| Institutions | National University of Singapore, UniversitƩ Bourgogne Franche-ComtƩ |
| Citations | 2 |
Abstract
Section titled āAbstractāFour sets of numerical models were created to study the eļ¬ects of shapes, staggering patterns, Helmholtz resonators and array conļ¬gurations on the acoustical performance of sonic crystals (SCs) in order to design an eļ¬cient SC window to mitigate the traļ¬c noise level at a room in a student hostel of NUS. Rectangular SCs consistently obtained highest transmission loss for frequencies ranging from 300 Hz to 3000 Hz compared to diamond and semi-circle SCs. Fully staggered pattern performed better than non-staggered and 50 % staggered patterns for frequencies below 1700 Hz. Helmholtz resonators were useful for enhancing low frequency noise mitigation. The prototype of the ļ¬nal designed SC window was fabricated and tested in order to validate the simulation result. Generally, numerical and experimental results were in similar trends. Maximum transmission loss of the SC window was found to be occurred at 900 Hz which was about 18 dB.