Sound Analyzer App lets you use your smartphone as a Sound Level Meter (SLM) and a Real time Audio Analyzer (RTA). Environmental noise, measured in decibel (dB) can be monitored in real time. The microphone sensitivity is adjustable by means of the calibration menu. App with no ads, banner or popups. Features as sound meter (decibel meter): A, C and Z (flat) frequency weightings, Fast and Slow time weightings, Equivalent A-weighted continuous sound level (LAeq), A-weighted sound exposure leve