In this presentation, propagation of acoustic wave through a periodic structure will be discussed. Such a periodic structure has been found to attenuate sound significantly in certain frequency bands, and therefore it can be used as a frequency filter and sound barrier. Experiments were performed to measure the sound attenuation by the periodic structure made of acrylic cylinders. The experimental results were compared with a simulation study using the finite element method, and they are in good agreement. The benefit of such structure is that it is light weight compared to the solid barriers, and it can be tailored according to the frequency of the sound source to be attenuated.
Keywords: Sound barrier, frequency filter, periodic structure, finite element method
About the Speaker
Mr. Arpan Gupta is a research scholar, currently pursuing his PhD degree in Mechanical Engineering from National University of Singapore (NUS). He is working under the supervision of Associate Prof. Chew Chye Heng and Associate Prof. Lim Kian Meng.
