How to plot the decibel level of the sound in the atmosphere using iPhone's inbuilt mic, without recording the sound?
<p>I want to plot the decibel level of the sound in the atmosphere that hearing through the iPhone's inbuilt mic. I don't want to record the sound to plot. I want a sound level indicator, with a graph that frequently indicates the decibel level with respect to the sound. How can I do this?</p>
