Variability of room acoustic parameters with thermo-hygrometric conditions

The variation of the room acoustic parameters measured in an auditorium is influenced by many variables such as the equipment, the operator, the position and orientation of the sound source and the microphones, and the post-processing method used for the calculation. An influence of fundamental importance is due to the thermo-hygrometric variables, which is commonly neglected. In this article, an experimental analysis concerning the influence of the temperature, relative humidity, and air velocity on acoustic parameters is presented. Thermo-hygrometric variables have been varied and the variation of several room acoustic parameters has been analized. A statistical analysis of the correlations has been obtained and used for the evaluation of the variation of the acoustic parameters by changing the thermo-hygrometric variables. Finally, a statistical analysis has been conducted to find correlations between room acoustic parameters and thermo-hygrometric parameters.