Estudo experimental do leiaute de disposição dos materiais de absorção sonora em uma sala de aula
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Data
2023-02-16
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Universidade Federal de Goiás
Resumo
Classrooms have the function of promoting learning through oral communication and
listening. Thus, one of the main characteristics that determine the success of this function is
the acoustic quality of classrooms. Speech intelligibility is one of the most relevant
parameters and can be improved by minimizing external noise and reducing reverberation.
One tactic to decrease the reverberation of a room is to dampen sound energy by using
absorbent materials such as: padded chairs, curtains, carpets, and sound absorbing panels
(SAP). However, the influence of the positioning of the elements, especially the SAP, is little
studied. For the experiments of the positions with the SAP, Room 108 was used, which is
located in the Mechanical Engineering building, campus II of UFG and, based on ISO 3382-2,
2 distinct points were selected for the sound source and 6 distinct points for the receptor. The
data obtained was analyzed by the analysis of variance technique, aiming at identifying the
most significant factors for the acoustic performance of the environment, since the following
work has the general objective of investigating the arrangement of sound absorption materials
in classrooms, through the acoustic parameters obtained, such as Reverberation Time,
Brightness, Bass Ratio, Clarity and Definition. The results showed that the higher frequencies
provided better responses in all parameters. Furthermore, in general, it was observed that the
configuration with slabs placed closer to the frame and further back in the room stood out as
having the best acoustic performance for the room studied. On the other hand, the
configuration with slabs only closer to the board showed the worst responses, thus being
characterized as the worst layout for the same room.
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Citação
ASSIS, L. N. Estudo experimental do leiaute de disposição dos materiais de absorção sonora em uma sala de aula. 2023. 111 f. Dissertação (Mestrado em Engenharia Mecânica) - Universidade Federal de Goiás, Goiânia, 2023.