Sound Manipulation: Can manipulate sound waves, changing volume, frequency and how far the sound travels. He can create 'bubbles' where no sound can leave/enter.

Enhanced Senses: Zac's five senses are all heightened to highly advanced levels. He can hear, see and smell things clearer and from further away, has very sensitive taste buds and is good at picking out specific ingredients in food, and is more sensitive to touch all over his body.

EDIT: Thanks for the advice, Narayank :) I'll definitely take that into consideration. I really appreciate all kinds of constructive criticism, especially about my characters.