Several people were asked to jump over an XL2 placed on the floor, but none of them could do it. Why?
Because they are fond of the XL2. - Andrea T.
Is it because the
plastic bits break under the force of a light breeze? - Adam M.
it was placed against
a wall or in a corner - Peter P.
too nice to be destroyed ! - Gianni P.
They afraid to damage unit? :) - Jan P.
Could it be because landing on the floor from a jump might excite the floor to generate low-frequency signals that would exceed the 5 Hz frequency limit of the NTi microphone?
Alternately, the jumpers were from the Swiss
Olympic ski team and could not manage such a high jump!! - Neil S.
They couldn't jump over the XL2 because it is a thing of beauty, and they had to get closer to admire it ;) - Kevin H.
they were on level 1 floor
and the XL2 was on level 2 floor ..... - Bob W.
The XL2 was placed in a corner on the floor. Therefore, it is not possible for a person to jump over it.
- Paul Sinclair, NTi Audio
In physics it is enough that the audible wave be produced; "sound is a vibration that typically propagates as an audible wave of pressure, through a transmission medium such as air, water or other materials."
In human physiology and psychology sound does not exist unless a brain receives it; "sound is the reception of such waves and their perception by the brain." - https://en.wikipedia.org/wiki/Sound