REVIEW OF ACOUSTIC CHARACTERISTICS OF MATERIALS USING IMPEDANCE TUBE

With the unprecedented growth of automobiles in emerging economies, it is essential to ensure a qualitative competition among automotive manufacturers. The benchmarking of each product requires precise testing equipment for qualitative parametric valuation and marketing. Automotive noise control is one such area, and is important in preventing the noise as it is not desirable inside the vehicle. Noise control materials are used in passive noise control and are sensitized to different noise sources. These materials need to be characterized for noise control characteristics. This paper elaborately discusses various methods available for measuring the acoustic characteristics of materials.