What to expect during a hearing test?

After years of asking, my mom is finally considering taking me to get my hearing tested. I don't think I'e been tested since elementary school or something (so like about a decade). My mom is a doctor and tends to overshadow my opinions and experiences with her own, and I want the doctors to take this seriously and not dismiss me. What should I expect and what should I tell them? Music is a huge part of my life so I'll definitely be telling them about my exposure and stuff.