... 1 Detailed Product DescriptionAWA 6291 Real Time Signal Analyzer pocket real-time noise signal analyzerIEC61672 class ... the environment noise measuring, machines noise analysis, sound power level measuring, building acoustics measuring, as well ... ), 28 dB(Z) Measurement of Peak C sound level: 50~143 dB Linearity Range: 90dB ... be strengthened by nylon straps. Portable Real Time Sound Signal Analyzer