Chronicle: 60th Open Seminar on Acoustics Rzeszów – Polańczyk, Poland, September 9 – 13, 2013
Archives of Acoustics · 2013
This work presents the main experimental results obtained from the study of plaster test pieces with different parameters of its physical structure.Mainly an aeration of plaster and amount and diameter of the pearlite in it, expressed in per cent, are considered as parameters.Other parameters are also studied, but they play a minor part, for example the different thickness of the sample.Acoustic properties, measured via the sound absorption coefficient, are researched depending on the proportions of the aeration and/or the pearlite.The results are compared to the absorption coefficients of the conventional plasters.The physical, mechanical and thermal properties are not analyzed.The results show that an improvement in the absorption coefficient is obtained.This coefficient increases with the increase of aeration and appropriate diameter and proportion of the pearlite.This is due to the increase of the open porosity.