they'll probably just ask you why you are interested in audiology and the school, if you are interested in any specialties, strengths and weaknesses, and things like that. if you haven't done so already, look up what services the clinic offers (the more the better) or if they focus on a particular patient population/specialty program. in my opinion, students in AuD programs with their own clinics are at an advantage because of very obvious reasons.
i don't know if you feel comfortable commenting on your commitment to the field. i mean, it is a 4-year program and sometimes the task and monetary rewards are not always so glamorous, as evidently stated in a recent heated discussion on this forum. of course, your biggest reward comes when you realize how much restoring communication abilities improves your patient's quality of life.
good luck yisel. let us know how it goes. and don't worry so much about background--it's refreshing to have applicants with non-CommD majors. they think outside the box (or audiogram). 😉