Sound Meter Pro is the 4th set in the Smart Tools® collection.
The SPL (sound pressure level) meter app uses your built-in microphone to measure the volume of noise in decibels (db), and shows a benchmark. I had calibrated a lot of Android devices with an actual sound level meter (dBA).
DO NOT FORGET!! Most smartphone mics have been aligned with the human voice (300-3400Hz, 40-60dB). Therefore, the maximum value is limited by the manufacturers, and very loud sound (100+ dB) cannot be recognized. Moto G4 (max. 94), Galaxy S6 (85dB), Nexus 5 (82dB) … I had calibrated the main Android devices with an actual meter. You can trust the results of routine noise levels (40-70dB). Use this App as an auxiliary tool, please.
Vibrometer uses the phone sensors to measure vibration or an earthquake, and it shows a benchmark as an earthquake detector (seismometer).
The measured values are linked to the Mercalli Modified Intensity (MMI) scale. If it is incorrect, you can calibrate so that the maximum value is around 10-11. Use the results only for reference, as Android devices have a wide variety of performance and sensitivity.
* The Pro version adds features:
– No ads
– Sound level meter and Vibrometer are integrated
– Statistics menu (line graph)
– Export of CSV file
– The graph line duration
– Better calibrated models
For more information, watch YouTube and visit the blog. Thank you.
* This is a one-time payment. The price of the app is only billed once.
** No internet support: You can open this app without any connection. After installation, open the app 1-2 times with your device connected to Wi-Fi or 3G / 4G.