ABSTRACT
Reverberation Time (RT) is the most important parameter describing the acoustic quality of a room which can be defined as the decay time for sound in a room after an interrupted noise or an impulsive excitation stops. It is the time for a 60 dB drop in the sound level. To measure the RT depending on the volume of the room it is require producing an interrupted noise, with the built-in noise generator or impulsive excitation (Schroeder Method). Impulsive excitation can be produced by a pistol or balloon. In this study the impulsive excitation method was used. Reverberation time software BZ-7227 used to measure reverberation time in 1/3-octave with furnished empty classrooms. After the analyzer started and pistol was fired, the analyzer measured and analyzed the decay and displayed the RT spectrum and decay. The RT spectrum respect to frequency shown in Figure 4.
