Originally Posted by
Teacher49
Primary caveat is that the isolating system are typically "in ear". This means inserting the ear buds fairly deeply to get a good seal. Some find that uncomfortable. Some, like me, find that 15 - 20 hours of constant use is just fine.
I wound up purchasing several different tips for my Etymotics - lg and small 3 baffle, 2 baffle silicone, foam, etc. Finally figured out my left ear preferred the smaller 3 baffle silicone, right ear the large 3 baffle. When fully inserted (takes some courage the first few times!), noise is tremendously reduced. Can't hear PA, FA, neighbor snoring, etc. One plus about the etymotics - the buds are so small that you can actually lie on your ear and its not noticeable. Only a very thin wire protrudes.