Is Michael in GTA 5 deaf?

I'm curious, is it true that the character Michael in the popular video game Grand Theft Auto V (GTA 5) is depicted as being deaf? I've heard rumors that his lack of hearing is a key aspect of his character development, but I'm not entirely sure if this is accurate. Can you clarify if Michael is indeed portrayed as deaf in the game, and if so, how does this impact his storyline and gameplay?