I regularly wear a pair of Walker's Silencers.

They're designed to be hearing protection while shooting, but they have selectable filters like "clear voice" which makes voices easier to hear, while dampening other sound, and can be paired to my phone, so that I can listen to music.

That lets me reduce noise in crowds or loud environments, while still hearing people talking to me, and listening to The Allman Brothers. Because they are battery operated, I can't wear them all the time, but whenever I know I'm going to be in a noisy environment, I have them on me.