... ,wide dynamic range, 2.GB/T 3785,1-2010,GB/T 15952,IEC61672 3.30-year experience TL5618B ... /T 3785,1-2010, and the second class sound level meter standard and individual sound exposure meter standard of GB/T ... 15952.digital detection, automatic measuring range conversion, wide dynamic range,GB/T 3785,1-2010, ... 65kPa-108kPa digital individual sound exposure sound level meter