A free program for Android, by Splend Apps.
There is no need to go out and purchase a physical sound level meter when you can simply download and install the Sound Meter mobile app. It is designed to work seamlessly with most Android tables and devices, and you can get it for free from the Play Store.
The app utilizes the user's device's built-in microphone to measure recorded sound in decibels. It also shows a graph to visualize the measurement clearly. There is also a handy guide that shows examples for each sound level, from whispers to loud noises that can be harmful to one's ears.
However, it is important to note that a smartphone's built-in microphone is usually designed to adapt to the human voice level, meaning the app's maximum values may get compromised because of that limit.
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