The rain column is a hexagonal wooden instrument creating the sound of rain and running water. Inside, it rains crystal balls with a mixture of bioamaranth over several hundred to thousand tuned bamboo sticks. This sound, like the so-called white noise, contains all frequencies from 1 to 15 000 Hz at a time, which is quite sporadic and unique. By listening to these frequencies, one can resonate with the frequency of the Earth's aura. The sound of a sounding rain column slows down and optimizes brain waves, significantly affects the production of alpha brainwaves, columns with longer wording times even théta waves.