Here is the project page from 2014: http://people.csail.mit.edu/mrub/VisualMic/ http://people.csail.mit.edu/mrub/VisualMic/ And previous discussion: https://

Here is the project page from 2014: http://people.csail.mit.edu/mrub/VisualMic/ http://people.csail.mit.edu/mrub/VisualMic/ And previous discussion: https://news.ycombinator.com/item?id=8131785 https://news.ycombinator.com/item?id=8131785 https://news.ycombinator.com/item?id=9254654 https://news.ycombinator.com/item?id=9254654