关键词: 次声;数据收集;压力仓

    摘 要: 次声信号数据采集系统所采集的是0～20Hz的次声信号，该信号通过传声器转换为相应的电压信号.计算机实时采集、处理次声信号，分析次声信号的各主要频率成分和强度大小，对分析结果进行图形显示，曲线自动输出，并生成、打印最终结果.

    Development of infrasound signal data collecting system

    YI Nan，CHEN Jing-Zao，LI Ling，JIA Ke-Yong Department of Physiotherapy&Rehabilitation，Xi-jing Hospital，Fourth Military Medical University，Xi'an710033，China

    Keywords:infrasound;data collection;pressure chamber

    Abstract:Infrasound signal frequency of0～20Hz was col-lected by infrasound signal data collecting system.Sound col-lecting apparatus transformed the signal into voltage signal correspondingly.The computer analyzed the mainly frequen-cy and the density of the infrasound and also illustrated the results and gave printing curves automatically.

     0 引言

    次声是频率低于20Hz的弹性波 ......