Noise level of TWO (2) honda eu2000i

DFord79 · 08-25-2007, 10:35 AM

We need to purchase a Honda generator. Was wondering if I could get some feedback on useing 2 eu2000i and the sound level when both are running. I know they are very quiet alone but much noise do they make when you run both in tandum to run your A/C for example?

Fyrzowt · 08-25-2007, 10:50 AM

More than my 3000....

DFord79 · 08-25-2007, 10:52 AM

I know it louder than a 3000. Matter of fact a 3000 is slightly quieter than a 2000. My quandry is I have been told buy the AS dealer and by serveral people who use them the 3000 isnt enough to run a 13,500 A/C and charger etc.

**CanoeStream** · 08-25-2007, 10:53 AM

The eu2000i is quiet under no load but hellish under demand! See my one post here.

**CanoeStream** · 08-25-2007, 10:56 AM

Quote:

Originally Posted by DFord79

...the 3000 isnt enough to run a 13,500 A/C and charger etc.

Some people are saying it won't run the A/C & a microwave at the same time. I haven't run the numbers... Think last week I read my convection microwave demands 13.5 amps? Which would put some truth to the 'can't run both' idea.

Fyrzowt · 08-25-2007, 10:58 AM

Quote:

Originally Posted by DFord79

I know it louder than a 3000. Matter of fact a 3000 is slightly quieter than a 2000. My quandry is I have been told buy the AS dealer and by serveral people who use them the 3000 isnt enough to run a 13,500 A/C and charger etc.

I frankly don't know what size AC the PO installed, but when I run the AC on high in the eco mode, the throttle acceleration of the EU3000 is only slight to moderate. It doesn't come close to full throttle.
Dave

Dwight · 08-25-2007, 11:03 AM

I use my EU3000 for our Dometic 15K Heatpump with the ECO off and it works just fine.

**Chuck** · 08-25-2007, 11:06 AM

I walked past (within a few feet) of a 3000 the other day, and it wasn't making any more noise than a rooftop airconditioner would make. amazing...

2airishuman · 08-25-2007, 11:14 AM

2 eu2000i

make exactly the same level of noise as...

1 eu2000i.

http://www.airforums.com/forums/f448...0-a-19725.html

cheers
2air'

Fyrzowt · 08-25-2007, 03:49 PM

Quote:

2 eu2000i make exactly the same level of noise as... 1 eu2000i.

2air,
Would you help me understand this? I read the thread in the link you posted but didn't see any info on this statement. I did read your info on understanding db levels and it helped clarify things for me.
Using logic (which may not apply here) it would seem that 2 eu2000 generators would make twice as much noise as one. The db level between the 2 models (1000 and 2000) is close if not the same.
Thanks, Dave

Kevbo10 · 08-25-2007, 05:28 PM

Quote:

Originally Posted by DFord79

We need to purchase a Honda generator. Was wondering if I could get some feedback on useing 2 eu2000i and the sound level when both are running. I know they are very quiet alone but much noise do they make when you run both in tandum to run your A/C for example?

let's see, you're inside w/ the AC running, door closed to keep the hot weather out... stereo or tv on?

20' lead to the trailer...

who cares...

kevbo

kdenault · 08-25-2007, 06:07 PM

Quote:

Originally Posted by Dwight

I use my EU3000 for our Dometic 15K Heatpump with the ECO off and it works just fine.

Dwight,
Do you have power left after the 15K air conditioner kicks on? Not for a microwave or fridge, but for a laptop and lights?
Kathy in PA

2airishuman · 08-25-2007, 07:11 PM

Quote:

Originally Posted by Fyrzowt

...it would seem that 2 eu2000 generators would make twice as much noise as one.... Dave

my apologies in advance 2ne1 with formal sound science training...

sound is a vibratory disturbance transmitted by particles in the air...

drop a pebble in water to see the waves of energy...

sound waves behave somewhat like this water surface...

((((((.))))))

the machine vibration transmits energy into air particles which then move up/down in sound waves...

each generator produces vibrational energy which can be measured...

the vibrational energy of each generator IS added together following the basic '1+1+2' equation...

but that energy isn't transmitted directly from point a to b

just like the surface waves from the pebble aren't actually advancing much water...

hearing is the perception of these this energy in the soundwaves...

and the loudness (magnitude of perceived sensation) is measured in decibels...

which is a log (10) scale....

so while the energy levels are added the loudness scale doesn't follow as 1+1...

without going through the math (anyone really want it?) the increased 'loudness' is....

2 gens = 3db
3 gens = 5db
4 gens = 6db
5 gens = 7db

the human ear basically perceives a doubling of sound at 8 dbs....

so a 3 db increase is not enough for a perception of change in most ears...

of course this all assumes the 2 noise sources have perfectly sync'd waveforms/vibration...

for example IF the 2 gensets were timed OUT of phase...

their vibrational energies would CANCEL and the loudness would be near zero...

so 1+1 can actually equal zero in the 'wave world'

many osha websites or manuals include answers to these questions regarding adding or subtracting sound...

the effect of '2 machines' as been closely studied...

in plants/factories/dams and other sites where multiples of a machine operate...

so back to the h gensets in question...

moving from 49 dbs (at 1/4 power) to 58 dbs at full power...

the 1 generator becomes TWICE as loud...

since 2 gensets driving the a/c will not each be running at FULL power...

the 2 may actually be less loud under partial loads than 1 under FULL load...

as vajeep and wardinbb reported in the other thread...

cheers
2air'

and if i had not suggested 'exaclty the same level'...

no one would have asked 4 more info...

Fyrzowt · 08-25-2007, 07:37 PM

Thanks for that 2air. I would have assumed that 2 gens are twice as loud.
That's why I'm TRYING to learn not to make assumtions.
Dave