THE ANALYSIS OF SOUND ABSORBING PERFORMANCES FOR COMPOSITE PLATES CONTAINING RECYCLED TEXTILE WASTES

摘要

In this article we obtained some experimental results about soundproofing of three types of stratified composite materials made of: plate of short fiber fabricated from recovered textile which joins with: cork board; expanded polyethylene, laminated on one side with aluminum foil of 9μm thickness or extruded polystyrene. These materials used in the composite structure are analyzed in terms of the change in the absorption coefficient in the range of 100-3200 Hz. Experimental analyses are performed using an acoustic interferometer (Kundt tube) in order to classify absorbing materials submitted for testing.