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In this article,a proposal is made on the acoustic characteristic indices,such as maximum pinknoise sound pressure lcvel,frequency transmission characteristics,sound transmission gain,non-uniformity of sound field and distortion,and so on.They are based upon some measurements togetherwith the evaluation of using effect,and the operational performance of the electroacoustic facilitieswhich are available in China.Some experimental results and levels that have been achieved abroadare also taken into consideration.For the time being,the different levels of the acoustic characteristicindex being used are preferable for the speech or performance sound reinforcing System.
In this article, a proposal is made on the acoustic characteristic indices, such as maximum pinknoise sound pressure lcvel, frequency transmission characteristics, sound transmission gain, non-uniformity of sound field and distortion, and on they are based upon some measurements togetherwith the evaluation of using effect, and the operational performance of the electroacoustic facilitieswhich are available in China.Some experimental results and levels that have been achieved abroadare also taken into consideration .For the time being, the different levels of the acoustic characteristicindex being used for the speech or performance sound reinforcing System.