Putting in sound dampening - Ford Powerstroke Diesel Forum
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post #1 of 23 Old 03-11-2014, 01:08 AM Thread Starter
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Putting in sound dampening

While getting ready to install my cb antenna coax under the carpet I realized just how dirty it was so I decided to tear everything out except for the dash and while interior was gutted I decided lay done noise dampener.

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post #2 of 23 Old 03-11-2014, 03:48 AM
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Did you not do under the front seats too?

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post #3 of 23 Old 03-11-2014, 04:02 AM Thread Starter
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I an going to. I Just ran out of time over the weekend. Got all the carpet pressure washed and all the trim pieces cleaned up and ready to reinstall with New speakers and head unit. Should have it back together this coming weekend

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post #4 of 23 Old 03-11-2014, 05:54 AM
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How much did the sound dampener run for the whole truck if you dont mind me asking??
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post #5 of 23 Old 03-11-2014, 06:04 AM Thread Starter
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I bought 1 kit of dynamat that was $150 which I got to do the firewall and front floor and I got 6 rolls of peel and seal from Lowe's to do the rear and pillars. Also dynamat will be used on doors . Have not finished yet but so far I have used 3 of the rolls on the rear. The peel and seal ran me $16 a roll.

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post #6 of 23 Old 03-15-2014, 04:38 PM
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Let me know how much sound it actually blocks when you are done.

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post #7 of 23 Old 03-15-2014, 05:02 PM Thread Starter
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Will do. Should be done and all back together tomorrow evening

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post #8 of 23 Old 03-15-2014, 10:38 PM
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Originally Posted by jake1 View Post
Will do. Should be done and all back together tomorrow evening

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I don't want to be the bearer of bad news. Despite popular belief, CLD also known as Constrained-layer damping (I.E. Dynamat or Peal n' Seal) does not actually deaden sound. It simply absorbs vibrations, hence why it is so popular in the auto audio industry.

Before you put everything back together I suggest you buy some CCF and / or MLV. CCF = Closed Cell Foam , MLV = Mass Loaded Vinyl.

While a good dampener is good at removing vibrations it does a poor job at blocking sound. Studies have shown that 25% coverage of dampener is more than enough. Actually, Covering any more than 25% of you interior with dynmat shows very little return on investment.

MLV is what you want to block sound. This is heavy duty stuff and comes with a hefty price tag.

If you want to know more just ask!

Source: I'm a sound engineer.



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post #9 of 23 Old 03-15-2014, 10:57 PM
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Quote:
Originally Posted by Pwnm30rdi3 View Post
I don't want to be the bearer of bad news. Despite popular belief, CLD also known as Constrained-layer damping (I.E. Dynamat or Peal n' Seal) does not actually deaden sound. It simply absorbs vibrations, hence why it is so popular in the auto audio industry.

Before you put everything back together I suggest you buy some CCF and / or MLV. CCF = Closed Cell Foam , MLV = Mass Loaded Vinyl.

While a good dampener is good at removing vibrations it does a poor job at blocking sound. Studies have shown that 25% coverage of dampener is more than enough. Actually, Covering any more than 25% of you interior with dynmat shows very little return on investment.

CCF is great at absorbing sound, not blocking it but absorbing it. CCF works great inside your doors.

MLV is what you want to block sound. This is heavy duty stuff and comes with a hefty price tag.

If you want to know more just ask!

Source: I'm a sound engineer.

I was just doing some research.... Mass Loaded Vinyl~MLV~ 2 Pound~TM Soundproofing.com that stuff is awesome! if i ever pull my interior Im gonna lay the 2lb per sq foot down on the floorboard.


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post #10 of 23 Old 03-15-2014, 11:33 PM
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Quote:
Originally Posted by knuckledragger5 View Post
I was just doing some research.... Mass Loaded Vinyl~MLV~ 2 Pound~TM Soundproofing.com that stuff is awesome! if i ever pull my interior Im gonna lay the 2lb per sq foot down on the floorboard.
It's some really great stuff! I did my entire interior with CLD, CCF, & MLV.
The only locations I haven't done are the a-pillars and behind the dash.
Right now my biggest issue is wind noise. Damn OBS trucks have awful window & door seals.

If I remember properly used about 7 sq/ft of material in each door. (I attached the sound deadener to the outer skin of the door) I added roughly 20lbs of material to each door. My doors no longer sound & rattle like a tin can when they shut, instead I get a nice thud.

I had a scrap piece of MLV laying around so I took a picture (1.5lb per sq/ft):



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