soundproofing material HELP?
Racer
Joined: Nov 2004
Posts: 391
Likes: 1
From: Florence Al
Thanks for your info!! I have dynamat extreme in the vett and I am using 80 mil Rattle Trap in the bmw vert so you are saying use luxury liner over the bute rubber and under the carpet!!
I'm just going to come out and say this: Frost king is nearly useless for sound. Differences "heard" are psychoacoustic. The idea is solid - foam with a constraining layer. But the foam is not thick enough, nor is the foil layer massive enough. Simple laws of physics - 1/8" of open cell foam does virtually nothing to impede sound transmission.
****, 1/2" of open cell foam only scratches the surface.
However, Frost king works well as a thermal insulator.
If you want to use this principal - mass backed foam - your best bet is luxury liner. Or come up with your own foam/lead concoction for best results.
Viscoelastic layer at the bottom, to control panel vibration. Also doubling mass = 5db of reduction. On top of viscoelastic layer (Raamat BXT, Secondskin Damplifier, Dynamat) then you want to put your noise barrier (mass backed foam.)
Even then, consider this:
Your car is like a boat, and sound is like water. A little hole will let a lot of water in.
****, 1/2" of open cell foam only scratches the surface.
However, Frost king works well as a thermal insulator.
If you want to use this principal - mass backed foam - your best bet is luxury liner. Or come up with your own foam/lead concoction for best results.
Viscoelastic layer at the bottom, to control panel vibration. Also doubling mass = 5db of reduction. On top of viscoelastic layer (Raamat BXT, Secondskin Damplifier, Dynamat) then you want to put your noise barrier (mass backed foam.)
Even then, consider this:
Your car is like a boat, and sound is like water. A little hole will let a lot of water in.
Safety Car
Joined: Jul 2006
Posts: 4,724
Likes: 7
From: Southern California
I have a C6 Coupe and I want to reduce road noise and some exhaust drone. I have a soundproofing mat (similar to a dynamat pad) covering the entire back cargo area. To improve the vibrations from exhaust drone, would you recommend installing Dynamat or Stinger Roadkill against the panels and then the pad over the Dynamat? Do you think this will help reduce the interior vibrations significantly? Any info. would be appreciated.
Team Owner
Joined: Feb 2000
Posts: 51,504
Likes: 6
From: Sacramento CA
If you can fit the luxury liner, it's a great product. Just keep in mind its VERY thick!
Keith N:
I have drone as well with my corsa competition. With a solid damping material (liquid paint stuff) and topped in raamat, plus luxury liner, I'd say it made a 10-15% change, maximum. Unfortunately a lot of drone is under 200hz, which is extremely hard to block.
How about Car Chemistry inserts? Its always better to fight the problem at the source.
Keith N:
I have drone as well with my corsa competition. With a solid damping material (liquid paint stuff) and topped in raamat, plus luxury liner, I'd say it made a 10-15% change, maximum. Unfortunately a lot of drone is under 200hz, which is extremely hard to block.
How about Car Chemistry inserts? Its always better to fight the problem at the source.
Racer
Joined: Nov 2004
Posts: 391
Likes: 1
From: Florence Al
I have a C6 Coupe and I want to reduce road noise and some exhaust drone. I have a soundproofing mat (similar to a dynamat pad) covering the entire back cargo area. To improve the vibrations from exhaust drone, would you recommend installing Dynamat or Stinger Roadkill against the panels and then the pad over the Dynamat? Do you think this will help reduce the interior vibrations significantly? Any info. would be appreciated.
Racer
Joined: Nov 2004
Posts: 391
Likes: 1
From: Florence Al
Kale what do you know about PVC Vinyl Barrier with Closed Cell Foam Decoupler
• Reduces Sound Transmission
• Contains Intrusive Noise
• Improves Health and Safety
• Provides Thermal Insulation
http://www.acousticalsurfaces.com/no...c_pvc.htm?d=14
this stuff is about 300 bucks shipped for 90 sq ft.
• Reduces Sound Transmission
• Contains Intrusive Noise
• Improves Health and Safety
• Provides Thermal Insulation
http://www.acousticalsurfaces.com/no...c_pvc.htm?d=14
this stuff is about 300 bucks shipped for 90 sq ft.
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Team Owner
Joined: Feb 2000
Posts: 51,504
Likes: 6
From: Sacramento CA
Kale what do you know about PVC Vinyl Barrier with Closed Cell Foam Decoupler
• Reduces Sound Transmission
• Contains Intrusive Noise
• Improves Health and Safety
• Provides Thermal Insulation
http://www.acousticalsurfaces.com/no...c_pvc.htm?d=14
this stuff is about 300 bucks shipped for 90 sq ft.
• Reduces Sound Transmission
• Contains Intrusive Noise
• Improves Health and Safety
• Provides Thermal Insulation
http://www.acousticalsurfaces.com/no...c_pvc.htm?d=14
this stuff is about 300 bucks shipped for 90 sq ft.
Safety Car
Joined: Jul 2006
Posts: 4,724
Likes: 7
From: Southern California
Keith N:
I have drone as well with my corsa competition. With a solid damping material (liquid paint stuff) and topped in raamat, plus luxury liner, I'd say it made a 10-15% change, maximum. Unfortunately a lot of drone is under 200hz, which is extremely hard to block.
How about Car Chemistry inserts? Its always better to fight the problem at the source.
I have drone as well with my corsa competition. With a solid damping material (liquid paint stuff) and topped in raamat, plus luxury liner, I'd say it made a 10-15% change, maximum. Unfortunately a lot of drone is under 200hz, which is extremely hard to block.
How about Car Chemistry inserts? Its always better to fight the problem at the source.
You were 100% correct on the reduction of the drone. I laid down some Dynamat Extreme, which helped but it's still there. For me, it's acceptable and fine. I'll see if it passes the "wifey test".
Thanks again - Keith
