I read an interesting article today that explained that certain hallucinations can happen when frequencies close to that of the body affect us. For example, apparently eyes have a resonance frequency of 18 Hz, so if they are subject to frequencies similar, i might see shapes in the corner of my eyes. If my ears pick up a frequey close to their resonance frequency, I might hear strange noises, etc. But what exactly does an eye’s resonance frequency mean? I’ve heard it talked about with glass and how singing at its frequency can make it shatter, but does that mean certain sounds can make my eyes pop too?
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Eyeballs are too squishy to resonate, but they are held in a bone socket which can. This energy will cause vibrations in your eyeball, making focusing difficult. The range varies from 18 to 800Hz.
[https://www.nature.com/articles/s41598-022-08874-x](https://www.nature.com/articles/s41598-022-08874-x)
Your ear bones resonate at anything from 20Hz to 20kHz, which is the standard range of human hearing. It’s the decibels, or wave pressure, that damages hearing, not frequency.
And if your ears operate in an environment where 20 – 20kHz is available then your eyes do too, except they can’t detect such low frequencies. Our eyes are tuned to visible light, which ranges from 400THz to 790THz, where THz is a billion hertz.
Again it’s the power, not the frequency, which causes damage. Put a pig’s head in a microwave oven and its eyes will definitely pop out of its head, because the gel inside the eyeball boils and the pressure bursts the wall.
But we also live in a world full of radio, microwave and infra-red radiation, all of which hit our eyes and ears. It’s only when we go higher than visible, into UV, x-ray and gamma that the frequency, at any power, becomes dangerous.
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