Mechanic and Acoustic Properties of the Sound-Absorbing Material Made from Natural Fiber and Polyester

<div>Measurement equipment in cross section by DC method. 1: piston with thickness indicator. 2: measure specimen cylinder barrel. 3: grid or perforation plate. 4: specimen. 5: grid or perforation plate for supporting the specimen. 6: seal ring. 7: opening to the atmosphere. 8: differential pressure measuring equipment. 9: flow meter. 10: air supply.</div>

Advances in Materials Science and Engineering

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Figure 1

Figure 1: Mechanic and Acoustic Properties of the Sound-Absorbing Material Made from Natural Fiber and Polyester 