掩蔽器是一种动态处理器,在适当电平的附加信号控制下,使主通道上的输入信号电平定量降低或减弱为0,当附加信号消失时,主通道信号又回复到原来状态,此种附加信号对主通道输入信号起着掩蔽作用,所以称为掩蔽器。其原理图见图1,主通道信号从压控放大器(VCA)输入端进去,附加信号从边链电路的比较器正端输入,阈电平调节由比较器负端加入,比较器的输出送到包络发生器上,包络 Masker is a kind of dynamic processor, under the control of additional signal of appropriate level, make the input signal level on the main channel quantitative reduce or weaken to 0, when the additional signal disappears, the main channel signal returns to the original state, This additional signal on the main channel input signal plays a masking effect, so called maskers. The schematic diagram shown in Figure 1, the main channel signal from the voltage-controlled amplifier (VCA) input into the additional signal from the comparator side of the circuit input, threshold level adjustment by the comparator negative input, the comparator output To the envelope generator, envelope