Amplify sound detection

Hello!
So I saw this really cool feature on Outlast 2 where it has sound detection. I’m guessing it’s a progress bar? But, I want to learn how to recreate it. Any one can help that be great! Here is the video which has the example I want. Also I can’t figure out how to make the W-T Zoom animation progress bar corresponding using the mouse wheel. All the best wishes and thanks.

Screen capture - a9938489e585065485e1db5e56f6b0d0 - Gyazo