Preferred Stage Feedback Of Audio System Under Chinese Vocal Condition

Stage is always regarded as"sound source", whose acoustic characteristic directly affects the performers'hearing of themselves, hearing of each other and stage performance. Good sound environment of stage is benefit of performer adjusting the volume, tone, rhythm on time and conveying the performance information accurately. At the same time, it also contributes to the formation of"ensemble effect", that is the integration of acoustic energy issued by the stage. Stage feedback system is an important means to achieve good stage sound field.Through literature reviewing, researching, subjective testing and other methods, the paper systematically combines the research process of sound environment of stage at home and abroad, and concludes several commonly used subjective experimental evaluation means of halls'sound quality. Chapter 4——the part of subjective experiment——Mainly discusses the validity under vocal condition of the ST1 and "Delay of feedback"to the subjective feelings of singers. And the author deems that ST1 is more reasonable to take the average of 63-8KHz octave band. Meanwhile preliminary draw is concluded:the sound pressure level and rhythm of singer has little effect on the preferred value section of ST1. (The conclusion is open to question, but at least, its impact is limited to a certain small section.) Finally, through the statistical analysis, we can educe that the preferred value section of ST1 is [-10,-9] dB, which can be extended to [-10,-8]dB(-9±1dB), the preferred value section of "Delay of feedback" i s [16,31]ms.The ending chapter summarizes the main work of this paper (conclusions), the existing problems and the direction of further research.