A free program for Android, by Mystic Mobile Apps GPS Tools.
With the Decibel Meter - Sound Meter, you can measure the sound pressure level (SPL) all around you. It is very simple to use and very accurate.
It uses the built-in microphone of your smartphone to capture the sound and then calculate the decibel level.
You can use the volume controls on your device to adjust the sensitivity of the microphone.
You can set the measurement time span and the frequency to which you want to calculate the decibel level.
You can see the results on your device's screen and save the values to your history.
The history will show all the data with date, time, and sound level. You can share the whole view with friends.
You can also record your measurements with the option of the audio recording. The app will keep the recordings for you.
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