ASV5911 noise analyzer adopts digital signal processing technology and modular design. It has the advantages of multi-function, high performance, small size and low power consumption. It can measure exponential mean sound pressure, equivalent sound, statistical sound, sound exposure and other indicators at the same time. It can also record the change of sound pressure over time and record sound files in the process of measurement. It integrates personal sound exposure meter, integral personal sound exposure meter, statistical analyzer, personal sound exposure meter, recorder, digital recorder and other instruments and functions in the body.