Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Assessment of Reverberation Time In Three Renovated Classrooms Through Five International Standards
Submission Author:
Eriberto Oliveira do Nascimento , PR
Co-Authors:
Eriberto Oliveira do Nascimento, Carla Dechechi Felipin, PAULO HENRIQUE TROMBETTA ZANNIN
Presenter: Eriberto Oliveira do Nascimento
doi://10.26678/ABCM.COBEM2019.COB2019-1292
Abstract
In room acoustic theory is well-known that any change in a room can dramatically alter the acoustic comfort on it. Consequently, before furthers changes, the room designer should evaluate if the changes are beneficial or not, especially when considering sensitive establishments as classrooms. Accordingly, this work is a case study that aims to make an acoustic assessment of three classrooms, built in the 60’s decade, which in 2007 those classrooms underwent a renovation, that changed the original acoustic ceiling revetment, CELOTEX M1, to a PVC ceiling. This assessment was done by measuring the Reverberation Time (RT) using IS0 3382-1, at two distinct time frames, the first one, in 2004 and the second, in 2017. The RT values were then compared to the values recommended by international standards from Brazil (12179/1992), France (Decree/1995), Japan (JIS A 1419/2000), United States of America (ANSI-ASA S12.60/2010) and World Health Organization (WHO), which stated the RT for classrooms. The results evidenced that the change of acoustic ceiling by the PVC impaired the acoustic quality in all studied classrooms. The current classrooms, with PVC acoustic ceiling, are considered inadequate for the intelligibility, according to the standards used. In conclusion, it was possible to demonstrate how important it is considering the impact of any change in the classroom regarding its acoustic comfort.
Keywords
reverberation time, room acoustics, acoustic quality, Classroom Renovation
