Sound Meter - SPL & Decibel Meter, Noise Detector Sound level meter - SPL meter app is shows a decibel values by measure the environmental noise, displays measured dB values in various forms. You can experience tidy graphic design with high frame by this smart sound meter app. SPL(Sound Pressure Level) meter app uses your embedded microphone to measure noise volume in decibels(db), and shows a reference. Our decibel meter uses your built-in microphone to measure sound volume in decibels (dB) a