The Acoustical Properties of Fiber Reinforced Polyesther (FRP) Panel Made of Oyster Shell Waste

This paper emphasizes on acoustical properties of the oyster shell based fiber reinforced polymer (FRP) panel. The dry oyster shell were milled and sieved before it mixed with polyester and methyl ethyl ketone peroxide as the catalyst. The composition is 200 ml, 125 grams, and 20 ml for the polyester, fiber, and catalyst respectively. The mixture casting is by using a square tray to form a flat FRP panel through open air drying without any compaction process. The sample of oyster shell FRP consist of samples with thickness 1,5 and 3,0 cm for three species of sea shells, Anadara granosa (AG), Perna viridis (PV) and Placuna placenta (PP). The entire measurements conducted by using transfer function based impedance tube technique refer to ASTM E-1050-98 standard. B&K 4206 connected to B&K Pulse LAN-XI utilized for this purpose. It found that the highest absorption coefficient is indicated by the 3 cm Placuna placenta FRP at a wider broadband frequencies and reached the peak of 0,472 at 2,096 k. Meanwhile, all samples had average of Sound Transmission Loss value of 55–57 dB in the octave band frequencies. The benefit of this research was the innovation of oyster shell waste based – acoustic material for interior design, due to the good acoustical performances.