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.
介绍了差动变压器式传感器的结构和输出特性，详细分析了其零残电压产生的原因，以及对测量系统非线性和灵敏度的影响。
The producing reason of residual voltage at zero point and its affection to the nonlinear quality and sensitivity of measurement system were analyzed extensively.
用差动放大器对轴承式检流计进行改造，使之具有灵敏度高、不易损坏、可直立放置等优点。
A bearing galvanometer is modified using a differential amplifier. It has the advantage of high sensitivity and is less likely to damage and able to be put upright.
应用推荐