Interferência do forro para melhoria da qualidade acústica em templo evangélico: estudo de caso

Abstract

The acoustic comfort of a temple adds value to the architectural ensemble, the place of worship is a just union and the perfect balance between the spiritual and the material, as Nicolas (2001) emphasizes. Evangelical temples are characterized as multiple spaces, that is, spaces where both a spoken word and a song are performed. Different performances, which require requirements with different acoustic requirements, between, with degrees of importance. In many cases, the temples are already designed with low intelligibility, in addition to presenting high sound intensity. The liner is one of the largest areas to be treated acoustically within a building, and can influence positively or negatively the acoustics of the building. It is necessary to distribute correspondence to a board by choosing a geometry and a material type suitable for the liner in each situation. This master 's dissertation aims to evaluate the interference of the liner as an element to improve the acoustic quality of an evangelical temple located in the municipality of. One methodology addressed four situations, the unlined temple, with lining parallel to the floor - straight; with multifaceted lining; and with curved lining. There was a concern to maintain the same volume of the building in the three situations, so that they were feasible as comparisons of the results. For each type of lining two types of material were defined, one reflective and the other absorbed, in eleven types of specifications. Through the software EASE 4.3, as well as the results of the respective parameters: Reverberation Time (TR), Initial Decision Time (EDT), Speech Clarity Index (C50), Clarity Index for Music (C80), Definition (D50) and Speech Transmission Index (STI). It was used for evaluation as octave bands. Two types of analysis were performed, a first analysis exam with one ISO 3328-1 and another according to Sound Reinforcement System (SRS). An individual situation (by lining) and a comparative situation (between lining). According to the results, it can be seen that with a decrease in the area of the reflective surface in the linings, the results tended to approximate what is recommended for the temple, in all parameters. That is, the 100% Reflective Liners presented worse results, while the 0% Reflective Liners, the better. In the case of the location of the linings, it can be seen that in the simulations according to ISO 3382-1, as the liner moves towards the end of the temple, the results tended to approximate and in some cases reach the values recommended in the Parameter C50, C80 and D50. For the EDT and STI parameters, a central reflective lining location presented the best results. By comparing them as shapes, there were subtle variations in parameter values. According to the results it can be seen that the lining interference in the acoustic quality of the temple is positive provided that it is composed of the appropriate material, correct location and quantity necessary to attend to the acoustic parameters of the temple.