Holy dooley, imagine being able to “perceive” pure 8Hz sound? No mention how many dB but “very pure low frequency signals” means no pesky background noise. Was the room help at constant pressure or were they actually perceiving atmospheric or HVAC pressure fluctuations? And did they all live happily ever after or suffer death by usual fossil fuel and other pollution causes? Only worth a look to check how many comment rants.

>more> TheOz