低频声波声检测研究

Study on the Low-frequency Sound Detection

提出了基于在线可编程模拟器件ispPAC10差动放大及低通滤波电路来完成低频声波信号的采集。该方法可有效地降低检测电路的噪声干扰,提高输出信号的信噪比。

This paper puts forward a method based on online programmable analog device ispPAClO＇s deferential amplification and the low-pass filter circuit for realizing the collection of the low--frequency sound wave signal. The method can effectively reduce noise interference of the detecting circuit and increase signal noise ratio of the outout signal.