Dynamat? sound dampening advice needed!!

[ndalton]

I need help, i am really new to all of this. I have a 1978 toyota pick up that i am putting two 10" subs in. they aren't the greatest but they bump and sound amazing for the price of free. I want to sound proof the interior and possible stop or at least reduce rattle on the exterior as well. I know that two tens aren't going to hit super hard to make much rattle but its also to stop the sound of the wheels and engine. I looked into Dynamat and Fatmat and even a liquid sound dampener but i read other threads on it and it said that liquid is almost useless. i also thought a about bedliners and rubberized spray sealant. what do all of you think? any advice and or info is and will be greatly appreciated.

btw my truck is all metal body

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[Falcons 5,000+ posts]

go here:

Sound Deadener Showdown - Your Source for Sound Deadening Products and Information

or here:

Audio Technix Sound Deadener - Better than Dynamat - News

 

[keep_hope_alive Premium Member]

The proper term is "sound damping". Dampening is what happens in the shower. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif.

Note that while that link reports 25% is the minimum required for a level of damping, don't neglect to address transmission loss. To increase transmission loss (I.e. reduce sound passing through the thin metal) you need 100% coverage of a decoupled barrier, such as 1 lb/sf MLV with a padding. Ideally, you would have both deadening and a barrier. And you get what you pay for. Elastomeric and viscoelastic properties cost more than mass alone.

 

[Flex68 10+ year member]

He might need that again, in English, Rich. lol

I keed, I keed