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Old 02-27-2015, 07:04 PM   #15
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I used spray foam on the inside walls of the genny compartment helped but the refleced noice is still there

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Old 02-27-2015, 07:34 PM   #16
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The generator mounts should be evaluated as well. Stock mounts are often unsatisfactory for vibration dampening.

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Old 02-28-2015, 05:13 PM   #17
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aauuumm has the right idea. I owned a recording studio for many years and did a lot of research into sound absorption and blockage.

You need mass to block sound. The thicker the better, so, the products from 3M, Hushmatt etc...are the best choice. You may want to spray rubberized undercoating in there for additional penetration into hard to reach areas. This would also act as an additional adhesive and would change the timbre of the metal ringing out as well.

But, being that the Generator is also coupled to the chassis, the sound will transmit thru the chassis as well as the vibration. Another idea would be to decouple it using rubber washers or those extremely heavy duty washers they use to decouple steering linkage on cars.

I'm nuts for this kind of DIY sound absorption stuff and I have quite a bit on our Sprinter based RV, but, I haven't bothered with the generator.

Fiberglass, etc...will do very little if anything.
2009 Fleetwood Icon 24A-Sprinter Diesel
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Old 02-28-2015, 10:17 PM   #18
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We have often parked in our daughter's yard, and when we were installing a power connection, we used the gennie. This resulted in burning the grass (turned brown) under the gennie. I would be hesitant to put anything within the bounds of the gennie compartment or under same without talkiing extensively with both the generator mfgr and the RV mfgr.

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