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A gymnasium space can be a highly reverberant due to the large space volume, coupled with an abundance of hard surfaces. Some designers frequently overlook the need for reverberation control in gymnasium and other large spaces. The high level of reverberation promotes a high noise level which interferes with speech intelligibility, thus degrading the primary functions of the spaces. Moreover, the additional functions such as student assemblies, community meetings or music performances which are very common in the large spaces, will severely suffer from the excessive reverberation. Renovation treatments to control the reverberation are developed using computer models.