Applicability Analysis of the Revised Acoustic Energy Model for Concert Auditoriums to Predict Energy Relations in a Theatre
* Presenting author
The prediction of objective acoustical parameters, especially those based on energy relations, in theatres is generally not an easy work. Although Barron and Lee proposed a revised acoustic energy model for concert auditoriums which has proved to be the most reliable among the models for the prediction of acoustical energy parameters in this kind of spaces [M. Barron and L-J. Lee, J. Acoust. Soc. Am. 84, 618–628 (1988)], it is still left unaddressed whether this model is also valid for theatres or not. For this sake, the present study applied Barron's model to a theatre in Hong Kong, and compared the predicted values and those measured in this hall for six energy-base parameters: early strength G80, late strength GL, sound strength G, clarity C80, definition D50 and center time Ts. The results show that the latter three parameters can be predicted with acceptable accuracy in general, while the former three are overall considerably overestimated. On the basis of these findings, a necessity is recommended in future research to propose a specific energy model for the acoustic prediction in theatres.