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Old 11-02-2015, 07:45 PM   #85
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6db is double the sound pressure level, anyone without a hearing aid will notice the difference. Most people will easily notice a 1dB change. 10dB will sound twice as loud (psychoacoustics).
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Old 11-02-2015, 08:39 PM   #86
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Quote:
Originally Posted by doorfx View Post
It proved your statement to be partially true. The deception about distance is clearly not correct


The difference in distance measurement is TRUE. I found the original posting, and the link still shows that Honda is measuring their dba numbers at 3 meters (9 feet). BIG difference comparing those numbers to champion measuring at 7 meters !

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http://powerequipment.honda.com/gene...odels/eu3000is
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Old 11-02-2015, 08:50 PM   #87
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Quote:
Originally Posted by pasdad1 View Post
The difference in distance measurement is TRUE. I found the original posting, and the link still shows that Honda is measuring their dba numbers at 3 meters (9 feet). BIG difference comparing those numbers to champion measuring at 7 meters !

Attachment 111045

Honda EU3000iS Model Info | Super Quiet 3000 Watt Inverter Generator | Honda Generators
Big indeed: Inverse square law in action:

http://hyperphysics.phy-astr.gsu.edu...ic/invsqs.html
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Old 11-02-2015, 09:09 PM   #88
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I though that this was an obvious choice for this thread.................

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Old 11-02-2015, 09:22 PM   #89
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Meanwhile, back on topic......................

Regarding sufficient airflow for inverter generators. I tried mounting my EU3000is inside the front storage compartment of my camper.



There are doors on both sides, and I figured that over a square foot on each when fully open should be more than enough for full air flow. I even installed a baffle to direct the exhaust side at the opening. The design allowed barely enough airflow. The amount of air being pushed through the genny has to cool not only the motor, but also the inverter and the internally-mounted exhaust manifold, muffler, and tail pipe. This baby really uses a lot of CFM to do that, compared with contractor style open frame gennies.

This is just a heads up to anyone who may want to enclose an inverter style genny. Based on actual experience, not just opinion.
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Old 11-02-2015, 11:22 PM   #90
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Thanks for the top about enclosed spaces. I didn't even think about the alternator and other items also needing air flow for cooling.
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Old 01-23-2016, 10:43 AM   #91
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Quiet box

During Desert Storm we learned to bury the very noisy military generators deep in a hole with plywood to keep the sides from caving in. This way most of the noise went straight up. With the addition of sand bags outside everything this made for a lot less noise. This concept may have some merit in your case. Hope this helps in some way
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Old 01-30-2016, 06:23 PM   #92
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I think this topic is relevant. My boon docking experience started by going to NASCAR race tracks. I had owned a "china" made Honda clone generator that was not the loudest but also not quiet. On our first trip to a track I was really worried about the noise it made. In reality mine was pretty quiet to what we found when we got on site. Me trying to be a good neighbor I looked at a few options like box's and such. I actually found leaving the generator in the bed of my truck with tailgate closed was about the best for noise and never say an issue with heat (other than forgetting to remove my cover that i set next to it and melted it). I spent alot of time walking around the track looking at ideas. Many built various boxes to cover and some worked better than others. Some didn't really care. My other reason for looking at every ones was to see what folks had that were really quiet. Being strapped for funds, being at the track was priority so needed to plan to upgrade over a few years. After 3 years and about 6 races later the one thing i did find was 75% of the quiet gen sets I found were the honda's so last year we got 2 EU2000's. I was able to sell my old unit for a little cash. So although i have a quiet camper now i know not all can afford that.
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