Experimental Model for Estimation of Reveberation Time in Educational Rooms

Sound reflection in different places intensifies the sound of sources. Acoustic reflection is useful in some cases and is often unavoidable. Accurate determination and control of disturbing reflections has always been one of the important positions of acoustic science. Most existing educational and office environments have a short reverberation time and cause the sound to be annoyingly loud.In this paper, the variables affecting the resonance time and its real values in the educational environments of a university site are measured and the existing computational models for estimating the resonance time are analyzed and compared. A developed experimental model is presented based on a logical method using data collected from real environments.The mean absorption coefficient of internal surfaces in Moore environments was 0.04 01 0.01 and the measured resonance time was 0.78 s 0.28 s. 9 common computational models for estimating the reflection time have unacceptable values and more than three times higher for the index. In this research, based on the development of Sabin model, a new experimental Regression model has been presented that the results of predicting its Reverberation time(RT) compared to the measured values are reliable and have a P.value = 0.001, RMSD=0.18 s and coefficient of determination equal to R2 = 0.58.