Yeah, then there's also Greg Manchester's experiments which Casey Coverdale does quite nicely....with updates of Greg's "White Box" with the "Orange Box":
https://www.youtube.com/watch?v=YLQonx2Wgxk
....after a couple of years of all this though I decided to move on from ghost-box listening to...
Structured Light Sensing using the Microsoft Kinect Cam with motion capturing software from Digital Dowsing...
So, want your mind to be totally blown now?
https://www.youtube.com/watch?v=T4iI9QUVxSc
https://www.youtube.com/watch?v=sZ14gWepPO8
https://www.youtube.com/watch?v=plzGpzSw0NY
https://www.youtube.com/watch?v=Ga4uKRHqGoM
Anyway, I'm done indulging in it for today...