Parametric Study of Factors Affecting Sound Absorption Characteristics of Acoustical Materials

The paper reports the parametric sensitivity of the factors affecting the sound absorption characteristics of the acoustical materials tested in the reverberation chambers. The various factors affecting the sound absorption characteristics such as air-gap, thickness, bulk density, porosity, tortuosity and air flow resistivity have been discussed based on the previous studies. The study also reports some of the recently developed acoustical sound absorbing materials having higher sound absorption characteristics for noise control applications.