A very basic application that shows the sound wave of whatever it hears.
Check out Sound Wave Pro
without Ads (https://play.google.com/store/apps/details?id=simpleapps.soundwavedetect.pro).
This app does not record any audio.
it just hears and draw the sound waves on screen. At the top left you can also see the magnitude of sound in decibel.
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9Apps 4.9
