How to get the Red of Rings of Death (Xbox 360)?
To withstand the pressure.
Since we have no detectors for light or sound that are small enough to give us readings, we can only go by theory. So far, I have not read any articles about light or sound in the dimensions beyond the three or four we normally experience. If there is one restriction, it is of the size of objects as small as you mention and a property called diffraction. Light waves bend around corners and spread out when passing through holes. Even at the very short wavelengths of visible and UV light, diffraction makes a large pattern of interference waves when small details are viewed. That is what limits the manufacture of computer chipssmaller is better, but smallest sizes possible with UV light printing are being reached. And very small details cannot be viewed with light (photons). Electron microscopes must be used. Perhaps details in the dimensions you ask about could be viewed with those.