Engine Room Sound Insulation - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 08-04-2011
Beersmith's Avatar
Sailing to surf
 
Join Date: Nov 2008
Location: St. Augustine, FL
Posts: 208
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 6
Beersmith is on a distinguished road
Engine Room Sound Insulation

I am looking at getting some Soundown foam to insulate my engine room. I am a bit confused by the difference between these two products:

Soundown Composite Insulation Vinyl Foam Sheets

Soundown Acoustic Absorption Foam

The second is much cheaper than the first, even at the same thickness. What are you getting with the vinyl foam sheets that the acoustic absorption foam doesn't have? The only thing I can figure out is the "barrier" feature, but that appears to be nothing but odor control, is that correct? Would I be extremely unhappy if I got the cheaper foam?
__________________
My boat rebuild/sailing blog:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #2  
Old 08-04-2011
Member
 
Join Date: Jan 2011
Posts: 83
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 4
shogan50 is on a distinguished road
The latter works by absorption, generally in the higher frequency ranges, the former more as a barrier in lower frequency. As a point of reference, I installed something similar to the foam, (1.5" noise attenuating ceiling tile), in my Islander 30 and could perceive no change in noise level. I fear in my case that the noise is getting transmitted right through the beds to the hull. If you install something, be please let us know how it worked out.
__________________
Islander 30 MKII "Sojourn"


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #3  
Old 08-04-2011
hellosailor's Avatar
Plausible Deniability
 
Join Date: Apr 2006
Posts: 10,559
Thanks: 2
Thanked 83 Times in 81 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
The barrier layer used to be LEAD in many products, but with the push to get lead out of the environment, and the cost of lead these days, vinyl is more common.

IIRC the science of it is that high frequency noise can be absorbed by foams, but low frequency noise consists of much higher energy levels (think of how you literally feel subsonic and bass noises) and you can only stop that energy by abosrbing it with something that has high mass (lead sheeting) and takes a lot of energy to move.

Depending on what your noise source is generating, one or the other may be more effective but the stuff with the "mass" layer generally should absorb more noise. It isn't just to block odor or moisture, it is there to absorb energy.

As shogan says, those lower frequencies may come through things like your engine bed. In theory you have rubber engine mounts, which stiffen as they age and should be replaced every 5 years or so. Those also dampen vibration and noise. In theory.

And plugging up every hole, every noise pathway, and using the right hangers/adhesives, is supposed to make a huge difference, regardless of the material.

Last edited by hellosailor; 08-04-2011 at 03:59 PM.
Reply With Quote Share with Facebook
  #4  
Old 08-04-2011
Beersmith's Avatar
Sailing to surf
 
Join Date: Nov 2008
Location: St. Augustine, FL
Posts: 208
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 6
Beersmith is on a distinguished road
Thanks very much for the info.
__________________
My boat rebuild/sailing blog:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine room sound-proofing mzw Morgan 5 04-25-2012 09:41 AM
Engine Room Insulation eharan Gear & Maintenance 4 10-26-2008 11:46 AM
Engine Room Insulation RichardElliott Gear & Maintenance 1 01-09-2004 02:00 PM
Engine Room Insulation robw_fl Gear & Maintenance 4 03-09-2003 04:47 AM
Sound Insulation Foam Sue & Larry Gear and Maintenance Articles 0 01-31-2002 07:00 PM


All times are GMT -4. The time now is 07:42 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.