We just dropped a new 10kw Yanmar genset between the engines in our
50x15 Burns-Craft and it's noisy. It's got engine and intake
noise, the exhaust is pretty quiet. It doesn't have a sound
enclosure. Does anyone have any experience in
sound insulating a boat? The aft stateroom shares a bulkhead
with the engines and the hatches are just fiberglass.
After reading all of the good advice on this forum, I'm sure
someone has some experience to offer.
Thanks,
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joetil 50x15 Burns-Craft in South Fla
Acoustic ceiling tiles in the engine compartment will help (yes they're fire retardent), but you probably need to build a sound enclosure for it. Could look into different mounts for it too.
Another good material to use is the semi-rigid material that is used in fabricating HVAC ductwork, which is also fire-retardent and waterproof to a degree. You could attach the material directly to the bulkhead or use 1-by's attached to the bulkhead to frame a false bulkhead, and then attach the insulating material. Either method would greatly reduce not only noise, but heat from the bilge radiating into the cabin. Yanmar may offer a sound sheild option for the generator. Turning up the stereo or TV also helps drown out generator noise! :0)
thanks for the replies...A sound shield would be the best bet,
but there isn't adequate room between the engines to get a
sound shield in....the hoses, heat exchanger, etc. come real close
to the engines.
I've installed a sound suppressing air cleaner housing which helped
some, and I just got a case of 1.5" fiberglass AC duct board.
I'm going to remove the paneling on the cabin side of the
rear stateroom and seal it with duct board and fill the cracks with
polyurethane foam.. I'll keep you appraised of the results.
I've looked into sound reducing panels, but they're very
pricey; although that's what I might have to go with eventually.
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joetil 50x15 Burns-Craft in South Fla
We removed the rear paneling in the aft stateroom on our 50'
Burns-Craft and found that it's mounted directly to the firewall so
there's no airspace and no insulation. On both sides the
paneling is all that separates the engine spaces from the
stateroom. I built a 2x4 wall and filled it with 1/2# spray
polyurethane foam and covered it with new paneling. I lost 2"
from the room space and my decibel level dropped by 10db.
Hallelujah!, my sound problems (and engine room smells) are
gone. The insulation foam not only dropped the sound level
but it also keeps out all of the heat from the engines
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joetil 50x15 Burns-Craft in South Fla
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10/14/2006 06:46:59 PM
