I picked up a set of these 3M Professional Black Hearing Protector at Home Depot for $25 last night and I highly recommend.



I wore earbuds under these while using a Flex 3401 and Makita 9227c and the only thing I could hear was the sweet sounds of Bob Marley & the Wailers.

I took a short break at one point and forgot to put them back on and immediately stopped to put them back on. If you plan on using a DA for more than a couple hours you should consider some form of hearing protection. It made polishing much more pleasant.