频谱分析仪和微机辅助系统对昆虫声信号的分析

A COMPARTSON OF THE REAL TIME DIGITAL SPECTRUM ANALYZER WITH A MICROCOMPUTER-AIDED SPECTRUM ANALYSIS SYSTEM IN THEIR APPLICATION TO ANALYZING INSECT SOUND WAVES

用NW6270型实时数字频谱分析仪和声信号微机辅助分析系统对橙斑白条天牛Batocera davidis(Deyrolle)成虫的声信号进行了分析。结果表明,频谱分析仪处理速度快,可实时显示声信号的动态结构,有利于信号整体特征的分析和噪音鉴别。但分辨率较低,功能单一,专用性强,造价高.微机辅助分析系统具有功能多,灵活性大,分辩率高,造价低等优点。但不能显示信号的动态结构,处理速度慢,难以分析较长信号。

The real time digital spectrum analyzer(NW6270 Type,made in Nanjing,China)and a microcomputer-aided spectrum analysis system developed by the SouthwestAgricultural University were adopted to analyze the sound signals produced by theadults of Batocera davidis(Deyrolle).The former instrument proved to be highly effi-cient,able to diaplay the dynamic spectrum structure and thus is recommended to ana-lyze the ganeral characteristics of the signals and to distinguish them from the othersignals.However,this monofunctional instrument has relative low discernibility,ishighly specialized in funcition and expensive to buy.In contrast,the latter instrumentproved to be a muitifuncionai device.It is characterized by good adaptability,highdiscernibility and inexpensiveness.Unable to display the dynamic spectrum structureof the sound signals with its present function software,it is low in efficiency and can-not be applied in the analysis of long signals.