It's really difficult to find anything geared directly towards Audiology at the undergrad level. I'm a senior in CSD and my B.S. program is verrrrry school-based SLP focused in its curriculum and opportunities. I (and I'm sure many other people at other institutions) have fought for every ounce of experience.
The best advice I can give is to just start OBSERVING. Call local audiologists in private practice, audiologists at a hospital, an ENT office, a school for the deaf, etc. I've been able to have at least four different internships and all of them have come from observing with an audiologist and then asking if they need help or if they'd allow me to continue working with them. You'd be surprised how many professionals are supportive of your career choice!
After trying to find the "direct" experience, it's helpful to immerse yourself in other things to show you're well-rounded. Being a student athlete is great experience! It could be tutoring, volunteering in any area, or going to as many local conferences and lectures as possible.
I think as long as you can get some experience seeing exactly what an audiologist does, that gives you enough knowledge to know what you're getting into. Personally, (and I don't know this for sure), I think admissions committees just want to see that you know what you're getting yourself into by committing to this profession. They want to see that you'll contribute more than just perfect grades to their program and that you won't quit because you weren't completely sure an AuD is what you wanted. As long as you can express your passion and commitment, I think the amount of direct experience is weighed a little less than your personality and what you have to tell them.
Hope this helps a little!! =)