itsabig: this works.....nothing like the mass of terra firma to absorb all of that
clatter, and it's very easy to route air flow in and out!
William Elliott: Do you have any thoughts on building a separate box to run an exhaust
outlet into? I live in a town home and I need to keep a generator really
quiet. I'm going to make a generator box, but i was curious to see if you
have ever attempted to run the exhaust into another sound deadening box or
if you had any thoughts on it.
Kurt Kolb: Wouldn't that make starting, stopping, and refueling a bit difficult? What
about rain and pooling water in the hole? I would think building an
enclosure would be a better method.
silverbankruptcy: I agree with you, the sound comes mostly from the motor running. I built a
sound enclosure for mine. Video at 3GE_qqRMWN8
Kurt Kolb: If you need a really quiet generator, I suggest a Honda Inverter model. I
have an EU2000 and it is much, much more quiet than this thing in the
video. But if you're stuck with something similar, I would try a Super
Trapp muffler and the generator box first. I am of the thought that bad
things can happen when exhaust is re-routed. And I think in the final scene
in the video the noise level is actually more mechanical than it is exhaust.
itsabig: most of the solutions i've seen on youtube miss one basic of sound
attenuation. if you put an enclosure around the sound-source, you're simply
installing a speaker-cone effect to further radiate the sound you're trying
to suppress. basic sound damping requires a void between the origin of the
sound, and the outside environment. allow an area between the enclosure and
the outer shell, and you'll half the decibel level, or even more....double
walled with few connections works, look into it!
Kurt Kolb: In this particular application I don't feel the benefits gained were worth
the cost. I believe I paid about $180 for this configuration and I would
have returned it for a refund if the finish wouldn't have started burning
off during the test. The generator isn't as loud as before and the
percussive sound of the original muffler is gone, so there is some benefit.
Then again, this was a $500 6000w generator. If I wanted quiet I would need
two Honda EU3000 units which would be closer to $3k.
hooverrandy: I know the SuperTrapp mufflers are pricey but they "sound" worth it.
Richard Cavalier: I am thinking just BURY it in a square hole witha plywood/fiberboard top?
Of course routing the exhaust out and provide a fresh air pipe...Opinions
TheChevyvan94: Mehr dB wirst wohl nicht killen können...die Allgemeinen Betriebsgeräusche
des Motors im Betrieb sind doch ohne Dämpfung (Gehäuse) sehr laut..
bigdogintexas: Agreed, I find that a much larger sound deading factor comes from using a
fiberboard "enclousure" that fits around the generator, a lot of sound, and
I mean a lot, actually is coming from the motor and not out of the exhaust
system, though the exhaust is certainly a prime source as well. A
fiberboard enclouser is portable to an extend that it can be broken down
and folded, and put back into "shape" for use when generator is out of
storage, or used away from a "fixed" location.
Super Trapp Quiet Muffler on Generator4.3
out of 5