Performance Testing for Sound Absorption Coefficient by Using Impedance Tube

The sound absorption characteristics of the single and multi layered porous materials are studied with the help of impedance tube. In Impedance tube standing wave and transfer function methods are used more for its accuracy and reliability. The standing wave method is simple and transfer function method is accurate. The materials are tested for its sound absorption co-efficient. The standing wave method is used in this study. The results are compared with the existing tube. The two different samples are compared with existing tube. The results are analyzed.