i'm on the B738. i wear elacin ER-15 earplugs below our company-supplied sennheiser HMEC-45 ANR. but i just bought the bose qc15 and the difference btw the on-the-ear sennheiser and the over-the-ear bose is stunning. during cruise i took the hmec-45 off and put the bose on. i was so baffled that i thought the ANR on the sennheiser might have been off. but it wasn't!
