Helpdesk

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