提出了应用差动放大理论和灵敏度不同的传感器来完成强噪声环境下微弱声信号提取的方法。
A method of sound detection under strong noise conditions is advanced applying the theory of differential amplifier and utilizing transducers having different sensitivities.
内置功率放大电路，可以单独成为一个小系统，并受主信号强切优先控制。
Built-in power amplifier circuits that can be a small system, and strong signal by cutting the main priority control.
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