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最近,电子工业部第三研究所研制出一套用于厅堂,舞台扩声系统动态失真测量的滤波器。该套仪器由四分之一倍频程带通滤波器和四分之三倍频程带阻滤波器组成。整机采用集成电路元件、有源滤波电路的形式。
Recently, the Third Institute of the Ministry of Electronics Industry has developed a set of filters for the dynamic distortion measurement of auditoriums and stage sound reinforcement systems. The set of instruments consists of a quarter-octave band-pass filter and a quarter-quarter band stop filter. Machine using integrated circuit components, active filter circuit in the form.