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本装置(见图1)的核心部分是由两个双T电桥组成的滤波器。该电桥能使右声道的频率特性曲线在200Hz和2000Hz处衰减下来,而左声道则加入了总信号和右声道输出信号之差。因此,沿两个声道总的传输系数不变。
The heart of this device (see Figure 1) is a filter consisting of two double T-bridges. The bridge attenuates the frequency characteristic of the right channel at 200 Hz and 2000 Hz, while the left channel adds the difference between the total and right channel output signals. Therefore, the total transmission coefficient along the two channels does not change.