I made a mistake, square waves and triangular waves have odd harmonics. A sawtooth wave has odd and even harmonics.
In order to reach higher frequencies ten times (even harmonics) the base frequency, in an audio reproduction, the waveform has to be sawtooth not square.
Only the audible range (sine waveforms) is effective when a square wave is used.
Just being noisy.
In the case of Silicosis, when you accidentally ingested silica,
Silicosis 90 (st 4575 7250 1500 3251-9 4775 5270 6670 7612) Hz
A much smoother sound set. Good night.
