I have used etymotic's earplugs for some time when mowing my lawn and using the snowblower. I also used them when I attended automotive auctions (I was a buyer for a new car dealership)where loud ambient noise is the norm. One thing I noticed is when attending auctions where 6-10 lines of auto's were going at the same time, they filtered noise to allow me to concentrate easier on the lane I was buying in.
Whether its these plugs or just foam plugs, you only have 2 ears and I have not heard of a hearing transplant!
Whether its these plugs or just foam plugs, you only have 2 ears and I have not heard of a hearing transplant!