Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. XIII
Written by Marta Cristina ZAHARIA, Daniela DOBRE, Claudiu Sorin DRAGOMIR
In the case of the acoustic design of some rooms, such as audition rooms, classrooms for education, etc., the knowledge of the acoustic absorption characteristics of the materials/products that will be used for the interior surface finishes (walls, floors, ceilings) is of particular importance. Depending on the activity that takes place in the room, it is necessary to obtain a certain value of the reverberation time in order to achieve acoustic comfort. In many research projects, carried out in INCD URBAN-INCERC, INCERC Bucharest Branch, laboratory experiments were carried out on some types of classic materials (polyethylene, felt in plates of basaltic mineral wool) or natural, ecological materials (wool for use in construction, or wooden boards, etc.). The research ware carried out in the reverberation chamber in the Building Acoustics Laboratory. The results of the studies are presented in the article as acoustic absorption coefficient in the diffuse field, 'αs', in graphical forms of frequency range 100 to 5000 Hz and as the evaluation acoustic absorption coefficient 'αw' and are compared considering the influence of the physical characteristics of the tested materials.
[Read full article] [Citation]
