Not sure if this is the correct term, but I need a set of the earmuff-style hearing protectors that allow "normal" sounds like voices, to be heard, but block out louder noises; especially engine-type. I am going out on a lobster boat with my son-in-law this weekend, and the exhaust noise of the boat makes it impossile for me to hear normal conversation and ship-to-ship radio chatter. Any recommendations? I would be getting them at either Wallyworld or Dick's or possibly Home despot. Thanks for any help, people!