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Old 01-31-2015, 07:31 AM   #57
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My guess would be that each brand could be different depending on the way they are built, shrouds used and the type of muffler used.

You would have to research each brand to see if they offer DB specs for each output, 2000 versus 3000.

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Old 01-31-2015, 08:20 AM   #58
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Trying to understand generators...

Reference my chart in post #16 above.....

It gives minimum and maximum dB for each Honda generator. Note the small print at the bottom which says the measurements were taken at 3 meters away from the control panel side of the generator. Louder generator brands will take their measurements farther away (some at 50 feet or more) and then compare their numbers with Honda and say they are as quiet. It's common sense that something farther away sounds quieter to our ears than when it's close ! Don't be fooled by this marketing technique. Also it's common sense that pointing the exhaust towards your ears is louder than pointing it away...so try to make sure measurements are taken the same way when comparing numbers.

Looking at the chart, the big heavy 3000i will idle down to 49 dB and be quieter than the 2000 at idle at 53. Also the 3000i is listed at 58 at max load where the 2000 is one dB louder at 59. Extrapolating from this data, it's clear that the 3000i will be quieter than a 2000 across all loads.

The big issue is weight and distance from your ears. If you leave the 3000 in your truck it will sound louder than if you take the 2000 thirty feet from the trailer with a long shore cord.
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Old 01-31-2015, 08:20 AM   #59
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dkperez......I got this info from a Camping World ad,

Honda EU2000i 46 pounds
2000 watts max 1600 watts rated
53db at 1/4 load 59db at rated load
15 hours run time at 1/4 load, 4 hours at rated load

Honda EU3000is 134 pounds
3000 watts max 2800 watts rated
49db at 1/4 load 58db at rated load
20 hours run time at 1/4 load, 7 hours at rated load

Hope this might help with your search
Oh on edit, looks like you just got that info in above post
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Old 01-31-2015, 10:31 AM   #60
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Yes, I also found a chart that showed:

eu2000i with eco throttle on
exhaust side 60 dba
broadside 57 dba
opposite from exhaust side 56 db

I found the same specs on the Honda chart that the 3000 was approximately 1 db quieter... So, insignificant.

I'm tempted to go with 1 smaller unit now, and add a second if it turns out the spouse handles it well...

Just for empirical testing, I installed 6 different sound meters on my cell. Tested with white noise and 4 of them read within 1 db of each other. One read at least 8 db LOW, and one read at least 6 DB HIGH. So, I picked one of the 4 that had the easiest meter to read and kept it. I'll test in and outside the trailer once I have the generator...
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Old 01-31-2015, 11:03 AM   #61
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I am making A/C mufflers for the ceiling fixtures in my coach.

I would like to know which DB app you decided was the best for measuring DB's.

I would like one that is fairly accurate. I plan to measure before and after installation of the soundproofing mufflers.

Thanks,

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Old 01-31-2015, 10:02 PM   #62
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Quote:
Originally Posted by rgvtexan View Post
My next door neighbor has the Costco Smarter Tool 2000 watt gen. It is quite and runs anything in his RV except the AC. ~$600 at Costco. 2 of them will run the AC.
http://www.costco.com/.product.10012...rySiloedViewCP


I have a 8 year old 1KW Kipor. Bought in a pawn shop for $285. It still runs great (replaced fuel pump with a Honda's) It is quite and runs 4-5 hours a day for a week every year at the AIBF Balloon Fiesta. It charges the batteries, runs the TV and computers, lights, ect.
Just thinking 2 of these would cost $1200. Also 2x 51db=102db.

But this would cost $899 and 74 db and almost 10,000 start up amps and 7500 .
http://www.costco.com/Champion-7500-...100126410.html

Please correct me if I'm wrong. I'm really trying to figure out all this myself. Lol.
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Old 02-01-2015, 07:05 AM   #63
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Trying to understand generators...

Quote:
Originally Posted by TheMatrix View Post
Just thinking 2 of these would cost $1200. Also 2x 51db=102db.

But this would cost $899 and 74 db and almost 10,000 start up amps and 7500 .
http://www.costco.com/Champion-7500-...100126410.html

Please correct me if I'm wrong. I'm really trying to figure out all this myself. Lol.

When adding two identical sounds together, the dB only increases by 3.
In your example, two generators each producing 51 dB would have a combined dB of 54 NOT 102 !

Decibels are funny units. The scale is logarithmic. So 74 dB is WAY LOUDER than you think it seems. Think riding lawnmower loud.

This link will help
http://newt.phys.unsw.edu.au/jw/musFAQ.html
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Old 02-01-2015, 07:15 AM   #64
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Every 10 dB change is approximately twice as loud....so 74 dB sounds twice as loud as something producing 64 dB....and 4 times louder than 54 dB.

This link will help
http://newt.phys.unsw.edu.au/jw/musFAQ.html
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Old 02-01-2015, 11:36 AM   #65
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Two 50 lb generators would be a lot easier to steal than one 134 lb.

Put the 3000 in the back of the truck. Unhook the truck and turn it around so the cab faces the trailer, the generator will be facing away from the trailer. Chain the generator to the truck.
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Old 02-01-2015, 02:15 PM   #66
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Quote:
Originally Posted by pasdad1 View Post
When adding two identical sounds together, the dB only increases by 3.
In your example, two generators each producing 51 dB would have a combined dB of 54 NOT 102 !

Decibels are funny units. The scale is logarithmic. So 74 dB is WAY LOUDER than you think it seems. Think riding lawnmower loud.

This link will help
Acoustics FAQ
Ah thank you for that. I knew it had to be logarithmic and not linear in the back of my mind.
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Old 02-02-2015, 08:53 PM   #67
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I don't know if ANY of the meters are "accurate". I just picked one of the 4 that read very close to each other... I ended up with the Sound Meter version 1.6 by Smart Tools co.
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