Noise abatement for standby generator
Noise abatement for standby generator
(OP)
Need suggestions or solution to reduce sound emissions for a "Generac" liquid cooled gas engine generator QT080. The sound emissions in dBA at normal operation at 7meters is 74dBA. Problem is noise ordinance is not to exceed 60dBA at property line. The generator is within 15 feet of property line. Generator can not be moved. Limited budget and any modification to the generator would negate the warranty.





RE: Noise abatement for standby generator
Build a concrete box around it and direct the intake and exhaust openings away from the property line. Use baffle type openings so that you cannot see the engine from the outside.
Add some rockwool insulation (fire hazard) to get rid of high frequencies.
Rinse and repeat as necessary, building a russian doll of concret boxes
Direct the intake and exhaust into a truck silencer via a flexible coupling.
Cheers
Greg Locock
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RE: Noise abatement for standby generator
1) 60 dBA @ fence line
2) Can't move nor modify generator
3) Can't spend much
You say it's normally 74 dBA @ 7m so at fence line it's around 78 dBA. You then need ~17dB reduction in the form of an enclosure w/ silencers etc. There's air flow (both for engine and heat transfer) to consider.
Quite frankly, Greg's suggestion is about all you have left to consider, but even that won't be cheap.
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Aercoustics.com
RE: Noise abatement for standby generator
cheers,
gr2vessels
RE: Noise abatement for standby generator