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Now work out what the EQ curve of those ear plugs is, find a flat-EQ mic and have fun.
Right on MFB. I was going to say they tend to work as an EQ in cutting out some frequencies. I have some SkullCandy in ear phones that make my drums sound less resonant but make the cymbals all but audible. With the right electronics you can make them sound as you wish: the main reason all drums seem to sound alike when recorded.
To me any way.