Good marketing story for the general public, but yeah some things don't add up to me. Their page tries to explain IEMs with each frequency being it's own individual particle, and traditional IEMs ( speakers/headphones/normal hearing) scattering half of them while their design preserves it all.

I don't think that's quite how it works.

Then again, on their page they said they are treating sound waves the same as light waves, which is telling enough.

Your ear with an IEM is a pressure chamber type of environment, and sound waves with differing frequencies from a driver are generated more as a whole waveform. Their explanation seems flawed more you look at it

Gotta love their animation of how a traditional IEM has most of the soundwaves bouncing back and forth inside the chamber and only a few reach the eardrum https://cdn.shopify.com/s/files/1/1721/0649/files/Traditional-Earphones.gif?v=1662979573

This is why basic education is so important.

I’m a bit sceptical.

I’m not an audio expert by any means, but there’s more to human-to-human sound differences than just the reflections within the ear canal. There’s a lot of work by the brain involved and the whole area of psychoacoustics. Even if what they’re proposing would work from a technical point of view, that does not mean it’s going to sound any good. It for sure is interesting though.