Well Philips have been running adverts on UK television recently showing a MRI scanner. Maybe you could buy one? Would look amazing onstage!
I've found out that they cost around £1 million (excluding tax and installation!) Ouch not many loopers have that sort of money floating about (I know most of us like to buy equipment but even a MRI scanner may test the desires of the most ardent tech head)
Your experience Kris is closely related to John Cage's in the anechoic chamber in 1948. This led on to him composing the famous piece of music 4'33"
"There is always something to see, something to hear. In fact try as we may to make a silence, we cannot." John Cage