I hope your surgery is a success and you get your hearing back. That would be wonderful.
I think knit and crochet could work, probably someone has done it. I ran a quick search which didn't yield much that would be helpful. I know I've seen some discussion on this before but don't recall what people ended up doing. I'd say play with a few stitches of each and see what happens. If you like the result, go for it on a larger scale. Maybe someone else will have something more useful for you.
I should never overestimate my basic arithmetic skills.