Question

How could beethoven compose music despite his loss if hearing?

Answer 1

The young Beethoven was known as the most important musician since Mozart. By his mid-20s, he had studied with Haydn and was celebrated as a brilliant, virtuoso pianist.

Beethoven's life timeline: 1770 - 1802 >

By the time he turned 30 he had composed a couple of piano concertos, six string quartets, and his first symphony. Everything was looking pretty good for the guy, with the prospect of a long, successful career ahead. 

Then, he started to notice a buzzing sound in his ears - and everything was about to change.

Answer 2

Answer:

In spite of his impediment, he kept on forming music that changed the course of melodic history. In the mid 1800s, at 28 years old, Beethoven started to encounter an especially problematic type of tinnitus, or ringing in the ears. So diverting were the sounds in his ears that he had issues hearing his very own music.

He wrote down on staff paper what he heard in his head. Basically that is how all composers write music: head to staff paper. He didn’t need to physically hear it any more than any competent composer needs to physically hear the sounds he is transcribing.