Natural fibrehas a good capacity as acoustic insulation materials because of its characteristics, and therefore it is widely used in many applications. This research aims to explore biomass waste from the palm oil mill coconut production materials. Fibre wastes for this study included empty fruit bunch (EFB), mesocarp fibre (MF) coir (CF), which were treated using sodium hydroxide (NaOH) elimin...

Magnetic field is one efficient approach to realize non-contact control of materials. Here, we propose a type membrane-based metasurface consisting several parts magnetorheological films embedded with magnetic particles, which enable sound insulation through field. The abundant degree freedoms in membrane-type metamaterials are explored by considering composite structures. Through numerical cal...