I'm interested by your results, of course, but I want to give you the heads up that it's been proven that sound waves at a high enough frequency are more than capable of disrupting the biorhythms of living organisms and causing lasting damage to the tissues of the lungs, liver, and brain.

Muggles have been using sonic weapons for years. They've also developed a million other uses for sound waves aside from that. This spell you've developed has enormous revolutionary potential in any number of magical disciplines.

How concentrated is the range of the sound waves? Does it have an area effect, or does it focus on a single target, as most spells do? If I were you, I'd proceed with caution, unless you want to risk running afoul of the peripheral sound waves and suffering long-term damage to your own organs in the name of experimentation.