this post was submitted on 14 Jan 2024
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What app can do this? And do phone speakers even reach this range?
To the best of my knowledge,
no, which is why I said write some code,
And,
it technically depends but probably most speakers for most consumer grade hardware can do this, though I do not know about optimal decibel levels at such decibel ranges to be necessary to induce the effect, relative to time, battery life, energy cost, etc.
I will again repeat DO NOT DO THIS.
It legitimately could be considered terrorism.