Have you ever been on public transit, and you can hear someone's music blaring out of their earbuds? Now, we've all been told to turn the music down on occasion, but when someone's tiny little earphones sound loud to you, what do they sound like to person wearing them?

We don't need to be reminded that loud sounds can damage our hearing, permanently, so we must adhere to rule of thumb when wearing headphones, earphones, or have the stereo cranked up: