You Hear Muffled Sounds
Hearing muffled sounds isn’t uncommon with AirPods, and usually, the easiest fix should do the trick. First, try charging your AirPods, and also make sure you’re close enough to your iPhone when you’re listening to music.
If it isn’t a software issue, it might be a hardware problem. When was the last time you cleaned your AirPods? Don’t worry; you aren’t the only one. To clean your AirPods, get a cloth and slightly dampen it with water.
Next, wipe your AirPods until they’re completely clean. Leave them outside the case until they’re completely dry. And for the ear tips, you can try using a small brush to get rid of any residue. Hopefully, that should be enough to get rid of the muffled sounds.