國際規(guī)范IECPub651Type2,ANSIS1.4Type2頻率范圍31.5Hz-8KHzA加權(quán)30dB-130dBC加權(quán)30dB-130dB檔位6檔位,間隔10-dB30-80dB/40-90dB/50-100dB/60-110dB/70-120dB/80-130dB自動(dòng)換檔30-130dB時(shí)間加權(quán)FastandSlow動(dòng)態(tài)范圍50dB數(shù)字顯示4位數(shù)LCD(0.1dB分辨率)Quasi-analogbarindicator1dBdisplaysteps,50dBdisplayrange,updatedevery50ms.過載指示每個(gè)范圍之上限最低指示每個(gè)范圍之下限