This sounds like such a fun project. I'm excited for you! You might find it interesting to play around with the idea of visualizing "
$1" from passive echolocation. It might make the concept more obvious to sighted viewers if you were to dull the noise in time with the visual of the sound being blocked as well as create sound in stereo, but it sounds like your main focus is the animation at this point. :) Feel free to DM if you'd like to have a longer conversation.