The Sound Analyzer App lets you use your smartphone as a Sound Level Meter (SLM) and Real-Time 1/n-Octave band Analyzer (RTA). Instantaneous and integrated sound level parameters can be monitored in real time. App with no ads, banner or popups. Measured parameters as SLM: LAF: A-frequency weighted and Fast-time weighted. LAS: A-frequency weighted and Slow-time weighted.