Subjective Preference Study On Reverberation Time And Loudness For The Theater

There are more than three hundred operas of Chinese traditional opera, Beijing Opera is the biggest and the most extensive influence operas among these, which is regarded as national opera, is a treasure of national culture. People has more high demand for acoustic condition because of the continuous improvement of the life level?cultural accomplishment and people's viewing capabilities. And the hall's acoustics is associated with the objective acoustic parameters, but for now, there are no systematic researches on the sound quality of Beijing opera theatre. Thus, for the halls for performing Beijing Opera, its subjective preference values for the objective acoustic parameters should be studied, and then corresponding study results will contribute to guide its acoustic design practice.Firstly, this study according to the subjective survey of acoustical evaluation of Beijing Opera finds that, the respondents pay more attention the fullness of the singing,the articulation of the word, loud and clear, these subjective feelings are closely related to the reverberation time. As also can be seen from the results of the survey, an appropriate loudness is extremely important.So this study chooses reverberation time and loudness as objects of subjective preference study.Secondly, dry signals of ten segments of Beijing Opera were recorded in a semi-anechoic chamber, and used Odeon software obtained the impulse response with six different RT values.Then these simulated impulse responses were convolved with recorded dry signals. This study has a subjective RT experiment and a subjective loudness experiment. The subjective evaluation method is the paired comparison and the experiments were done in the semi-anechoic chamber.The listeners were divided into two groups. The preferred RT of Beijing Opera is between 0.2 and 0.6s from the paired comparison test.Finally, the subjective evaluation test signals with four different SPLvalues and used paired comparison method. The preferred loudness of Beijing Opera is between70 and 73 d BA from the test, the listener most satisfied the loudness at 70 dBA.