Gregory wrote <As to quieting with foam, yes, a piano can be quieted somewhat with foam under the soundboard and above the strings.> True, but it's more than a bit, depending on the foam. The foam 3" Markerfoam under the sounding board drops the volume of a grand piano by 5db, which is perceived as almost half as loud, say, 40%. A blanket of 2" foam, drops it another one or two db. For the sake of perspective, raising the lid on a grand makes 1db difference. Steve Yamaha
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