Design Guidelines for Classroom Acoustics in International Language Building, Thammasat University, Rangsit Campus.
Keywords:
Classroom Acoustics, Reverberation Time, Sound Absorbing MaterialAbstract
This study was aimed at finding the guidelines for the improvement of sound acoustics of 30 classrooms in the International Language Building, Thammasat University, Rangsit Campus. These classrooms are used for foreign language instruction, where communication is an important part of the learning process. Only 3 sound quality indexes were focused, namely, the background noise level (BNL), the reverberation time (RT), and the sound transmission class (STC) based on the ANSI S12.60-2010/Part 1 methods and criteria. The results showed that the reverberation time (RT) of the sample classroom did not pass the standard criteria, although its interior has been finished and installed with sound-absorbing material at the back wall. Improvement of classroom acoustics, therefore, should be done by installing additional sound-absorbing materials above the perforated gypsum ceiling. The outcome of the installation can be validated by the relevant equation.
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