Hearing people in noisy environments

I recently got diagnosed with ADHD. I always thought I had bad ears, because I could not understand people in noisy environments. Recently, I sat right next to two coworkers in a noisy cafeteria and I couldn't understnd either of them... Now I am wondering if it could be because of ADHD. However, I read in other posts that that would feel like being distracted by other noises. But it doesn't feel like that, it feels like everything is so loud that the sounds they make just get drowned out... Also, I have huge difficulties with understanding accents, I always feel bad because I am afraid people think I am doing it on purpose, especially when people I am with understand them. I was hoping some of you with the same problem could describe how it feels for you?