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Old 01-05-2010, 08:18 PM   #1
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Question Quieting the generator

Greetings, we have a 2005 PW Dodge Plateau with an Onan generator. We have old (2007) information indicating that it is possible to quiet the generator using insulating blankets. Would like to put this to use but can't determine exactly what kind of "insulating blankets" would be appropriate (by thickness or brand or size of piece). Further details on how to attach the blanket around the generator would be helpful too. Any suggestions would be much appreciated. Thanks.
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Old 01-05-2010, 08:39 PM   #2
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Default Re: Quieting the generator

Quote:
Originally Posted by kltgnl View Post
Greetings, we have a 2005 PW Dodge Plateau with an Onan generator. We have old (2007) information indicating that it is possible to quiet the generator using insulating blankets. Would like to put this to use but can't determine exactly what kind of "insulating blankets" would be appropriate (by thickness or brand or size of piece). Further details on how to attach the blanket around the generator would be helpful too. Any suggestions would be much appreciated. Thanks.
IMO don't suffocate your generator with heat storing blankets...

Onan Exhaust Resonator

"Noise is not measured on a linear/straight line scale - noise levels double every 3-5 dB(A)

So 73/75 dB(A) is twice as loud as 70 dB(A) or two 70 dB(A) units running together would produce between 73 and 75 dB(A)"

The National Parks standard is 67 db, at 23'.

With just the resonator you'll get a reading of 62 db at 23' (7 meters)

With the SuperTrapp and resonator 61 db at 23'.

Not a big difference, but noticeable.

The interesting numbers will be the measurements taken inside. With the resonator you'll get a reading of 60 db, and with the SuperTrapp on 55 db. I can only attribute this to the weight of the ST cutting down on the vibrations from the exhaust pipe.

http://www.dyersonline.com/Products/...or__16760.aspx

http://www.forestryforum.com/board/i...ic=41136.0;all

http://sprinter-source.com/forum/showthread.php?p=75723
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Old 01-06-2010, 01:45 AM   #3
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Default Re: Quieting the generator

I have heard that the resonator lowers pitch of the generator so the human ear doesn't perceive it as well. Now I would like to hear from someone who has actual experience doing this. The part is cheap enough and getting it installed at the local muffler shop would cost darn little. I would do it, if it actually makes a difference.

David

p.s. It voids your generator warranty if you care.
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Last edited by avid; 01-06-2010 at 01:46 AM. Reason: extended my remarks
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Old 01-06-2010, 02:43 AM   #4
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Default Re: Quieting the generator

Several of us have put on the resonator. It is not a great improvement but for the cost we thought it was worth it. Been 3 years now. It does lower the sound level slightly.
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Old 01-06-2010, 09:02 PM   #5
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Default Re: Quieting the generator

Here's what I did to make our generator quieter. The gen is now Honda-gen quiet: 65db right in front of it, and under 60db 20 feet away... Al
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File Type: pdf GeneratorQuiet.pdf (290.7 KB, 356 views)
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Old 01-19-2010, 06:58 PM   #6
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Default Re: Quieting the generator

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Originally Posted by aljimenez View Post
Here's what I did to make our generator quieter. The gen is now Honda-gen quiet: 65db right in front of it, and under 60db 20 feet away... Al
Thank you so much. If I have any questions, I would like to contact you. Is this possible? KLTGNL
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Old 01-19-2010, 07:48 PM   #7
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Default Re: Quieting the generator

yes, I have responded to your private e-mail... Al
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Old 01-20-2010, 12:23 PM   #8
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Default Re: Quieting the generator

After waiting 3 years, I finally had the resonator installed.
It makes a significant difference. I will be far, far less
concerned with others reaction to the noise.
I did not take any scientific measurements, so can't
comment. But I am very pleased with the difference.
I told the PW rep that I think they should offer the
resonator as a build option.
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Old 01-20-2010, 02:13 PM   #9
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Default Re: Quieting the generator

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Originally Posted by mike_mcginn View Post
After waiting 3 years, I finally had the resonator installed.
It makes a significant difference.
Were did you purchase the resonator? TIA

David
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Old 01-20-2010, 02:50 PM   #10
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Default Re: Quieting the generator

Quote:
Originally Posted by aljimenez View Post
Here's what I did to make our generator quieter. The gen is now Honda-gen quiet: 65db right in front of it, and under 60db 20 feet away... Al
IMHO, you've cut down the life expectancy of the 'No-Ran' considerably......If the manufacturer felt trapping excessive heat with thermal blankets in lieu of limiting sound was acceptable, they'd have installed sound deadening material under the generators shroud...

The second addition, being the 'No-Ran' Resonator is a safe, yet effective solution...
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