Green Materials for Sound Absorption

Abstract

Green materials are becoming a valid alternative to traditional synthetic materials. The green materials can be used in different fields of the building constructions. The green materials are sustainable, infact the at the end of its useful life they can be dispersed into the environment without damaging it. So the green material can be used in improving the acoustic comfort inside environment, as well as to mitigate noise pollution. In this paper are reported the acoustic measurements of the properties of green materials. The absorption coefficient of samples of the materials, were measured in the frequency range from 200 Hz to 2,000 Hz with an impedance tube (tube of ”Kundt”); the flow resistance was also measured. Furthermore the problems about the realization of sound-absorbing panels composed of green materials, used for the acoustic correction of classroom, were discussed.