Abstract:
Nowadays, absorptive material is one of interest material for noise reduction. Fibrous material is among the most popular absorptive material because it is flexible in shape and that can be applied in variety of application area. The mix of polyester and polypropylene fibers is investigated in this study. The physical properties of absorption materials (Fiber diameter, density of material and type of material) is evaluated by using Impedance tube refer to ASTM E1050 standard. The smaller fibers in diameter show higher acoustic absorption performance. The increase of the density of fibers show the better absorption performance at lower frequency, while the absorption performance decreasing at high frequency. By comparing between polyester and polypropylene, polypropylene has higher acoustic absorption performance.
