Sound Meter - smart tool-app to measure noise and sound level or measurement of sound pressure level (SPL) in decibels (dB). To get precise measurements, we recommend, before start using, make app calibration: settings -> calibration (automatic or manual). This application use the built-in microphone in your smartphone or tablet and results of measurements are shown in the chart. Sound meter includes the following features: - measure of sound level, vibration meter, noise detector - record o