Re: Acoustic Insulation for engine room?
We've used the foam/lead/foil panels with good results, but the best sound deadening we ever did (on a previous boat) was an old dentist X-ray apron draped over the block.
btw a tremendous amount of noise reduction can be achieved by isolating and eliminating vibration of locker doors, companionway steps, stove racks etc. Those kinds of rattles contribute disproportionately to the overall noise while motoring...
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
1984 Fast/Nicholson 345 "FastForward"