15 kHz – soundQuality org

Biological Effects of High Frequency Sound

Updated April 7, 2024 | Published March 6, 2021 by M

“…results suggest the existence of a previously unrecognized response to complex sound containing particular types of high frequencies above the audible range. We term this phenomenon the ‘hypersonic effect.” May explain why most listeners can hear a supposedly impossibly high-frequency difference between a 12 kilo Hertz square wave versus a 12 kilo Hertz sine wave. … Read more

If human hearing upper limit is 20 kHz then how does a 15 kHz sine-wave sound so remarkably different from 15 kHz square-wave ?

Updated February 21, 2024 | Published December 1, 2023 by M

The first (even, sine-wave) harmonic of 15 kHz is, by definition, 30 kHz, more than the supposed ‘upper limit’ of human hearing. The first (odd, square-wave) harmonic of 15 kHz is, by definition, 45 kHz, also more than the supposed ‘upper limit’ of human hearing. The 15 kHz fundamental of both sine and square is … Read more

Welcome fellow travelers; discerning smarties; open-minded and rational afficionados of truth and beauty, to our constantly-curated cornucopia of curiosities delving deeply beyond the beyonds of esoterica, eclectica, engineering, and evermore “-ologies” — a ‘top-drawer’ overflowing delectable variety and intrigue.

This website largely concerns vibrations, oscillations, energies — vibratory anything — with life, physics, science, music in primary focus, plus oddball tidbits mixed-in for flavor and zest.

“An investment in knowledge pays the best interest.” – Ben Franklin

All is inseparably connected via vibration. Per scripture, sound was the beginning: If “God is two octaves above man,” but ‘silence is golden,’ doesn’t that leave us somewhere between precious and divine? We should live up to that.