Conrad, Have tried a couple of different types. Currently use a white foam plug sold at drugstores that I toss when they get brown(dirty). When I was target shooting there was a plug that had a valve that closed on loud sounds but I find the attenuation of total sound a help in really noisy environments. The only problems I've had are with very old & worn pianos that have no tone projection- I just take one out and all is well. After using plugs for five years, I am not comfortable without them on the occasions I misplace them. (I carry spares everywhere now, one advantage of the disposables, they are cheap.) Hope it works for you. Dale Probst
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