[s]Sound I believe is taken, is there any other alchemy drive you can do? I know why you chose it and it's an interesting conception. I'm not sure, but movement or maybe limited air manipulation might also work in this instance? Like his alchemy can track and keep tabs on the air movements directed at him, even making it possible for him to guess or 'hear' with each letter sound giving off set amount of breath when formed or the pitch vibrating through the air. I think air manipulation is available. [/s]

Nvm. Xodus corrected me.