Fstedie writes –
“If you’re like me, you’ve noticed that the sound and fit of your Apple ear bud headphones is not the greatest. Here’s an easy way to improve both their sound and fit:
Find or buy an old Jabra cell phone head set. Ditch the headset and keep the ear gels (I found mine in my junk drawer). I’ve also seen them at swap meets for a couple of bucks.
Pick the right size for your ears. At least with mine, the size of the ear gels were almost perfect in size for the Apple ear buds. These gels “lock” in place inside your ear and improve the overall performance by isolating outside sounds and giving you a snugger fit.
Enjoy!” – Link.