分析了心音信号的产生机理、信号成分及心音的临床诊断价值。

The generation mechanism, compositions and clinical diagnostic value of the heart sound signals are analyzed.

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计算单元从由第二放大器放大的每个像 素信号中减去黑电平信号成分。

The computing unit subtracts a black level signal component from each of the pixel signals amplified by the second amplifier.

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模拟陷波器和数字陷波器由于消除工频干扰的同时也去除了信号成分，一般只在简单生物反馈中使用。

However both the analog and digital notch filter removes the signal component when they eliminate the power line interference, so they are only used in simple biofeedback.

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