Where did you here this? A ruptured eardrum is annoying, but it does not cause hearing loss. Eardrums grow back just like any other skin. Everything just sounds muffled for about a week and then hearing rapidly returns to normal. It doesn't even hurt (well the initial rupture does, but after that, it feels fine).

From WebMD:

"Typically, no specific treatment is needed for a ruptured eardrum because most heal on their own within 2-3 months. "

https://www.webmd.com/pain-managemen...and-treatments

And 2-3 months is for your normal hearing to return. After a week, I felt like my hearing had returned to normal, but it was probably at 90%.