A long time ago, I interviewed at a company called Earlens. They had a really interesting solution that used mineral oil to stick some kind of tiny speaker directly to your eardrum. The processor then beams the sound to the speaker. I think the first generation used a laser, but they've since switched to inductive coupling: https://earlens.com/wp-content/uploads/2022/09/LBL00153vJ.ar...

One of the engineers I had lunch with actually used their own product and he seemed to like it. I get the impression it's a more premium tier kind of thing that may not be covered by insurance, though.