A performance can either be enjoyed or not depending on the acoustic system of the room. The quality of the acoustic system can be measured based on an objective parameter that includes background noise, sound pressure level distribution and reveberation time. The measuring result in a case study shows that an auditorium that has problems relating to background noise level has to consider its ventilation system to avoid high background noise levels. It is important to consider the position of outdoor condensers, ducting joints and openings because the resulted low sound frequency can truly be disturbing during performances, especially to the audiences. Observations drawn on the acoustical performance show that some factors in interior design have to be considered such as room shape and dimension, finishing material and its arrangement in interior elements, to avoid uneven sound distribution and reveberation time that exceeding the standard criteria multifungsional auditoriums.
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