Sound Meter Pro

Developer's DescriptionBy Smart Tools co.Sound Meter Pro is the 4th set of Smart Tools collection.Sound Meter Pro is the 4th set of Smart Tools collection.SPL(sound pressure level) meter app uses your microphone to measure noise volume in decibels(db), and shows a reference. We calibrated a lot of android devices using an actual sound meter with dB(A).REMEMBER!! Most smart phone microphones were aligned to human voice (300-3400Hz, 40-60dB).Therefore maximum value is LIMITED by manufacturers, and very loud sound(100+ dB) cannot be recognized. Moto G3 (max.80), Galaxy S6 (85dB), Nexus 5 (82dB), HTC (82dB)...You can trust the result in routine-noise levels (40-70dB). Please use it as an auxiliary tool.Vibrometer uses the phone sensors to measure vibration or an earthquake, and it shows a reference as a seism detector.The measured values are related to Modified Mercalli Intensity scale (MMI). If it is inaccurate, you can calibrate it so that maximum value is about 10-11.Please use the results only for reference because android devices have a wide variety of performance and sensitivity.* Pro version added Features:- No ads- Sound Meter and Vibrometer are integrated- Statistic menu (line chart)- CSV file exporting- Line-chart duration- More models are calibrated* Do you want more tools? Get [Smart Tools] package.For more information, watch YouTube and visit the blog. Thank you.** No internet support : You can open this app without any connection. After installation, open the app 2-3 times with your device connect to WI-FI or 3G/4G.