Sound deadening with...

[brodeisel 10+ year member]

I love sound deadner topics any more. So much hostility in them.

 

[Rudy 10+ year member]

Mass loading almost never works in a vehicle. It is a widely used technique but only when the goal is to move a body's resonant frequency below a narrow band. You need to quadruple mass for every octave down in resonant frequency. If you're starting with a vehicle panel that weighs 4 pounds and is resonant at 800 Hz and want to get it below the audible range, well ... do the arithmetic. You'll be driving a tank.

Where a small shift will do the job, either adding mass - to lower resonant frequency or stiffening the panel, to raise it, might work. You wouldn't want to do both since the shifts would be offsetting. That's another problem with using these products to add mass - there's always some panel reinforcement going on at the same time.

 

[martiandancer31 10+ year member]

Mass loading almost never works in a vehicle. It is a widely used technique but only when the goal is to move a body's resonant frequency below a narrow band. You need to quadruple mass for every octave down in resonant frequency. If you're starting with a vehicle panel that weighs 4 pounds and is resonant at 800 Hz and want to get it below the audible range, well ... do the arithmetic. You'll be driving a tank.
Where a small shift will do the job, either adding mass - to lower resonant frequency or stiffening the panel, to raise it, might work. You wouldn't want to do both since the shifts would be offsetting. That's another problem with using these products to add mass - there's always some panel reinforcement going on at the same time.

if state farm would insure it i'd be driving a tank right now //content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif

 

[Rudy 10+ year member]

if state farm would insure it i'd be driving a tank right now //content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif

Good in traffic, easy to park?

//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[sacsking916 5,000+ posts]

Good in traffic, easy to park?
//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

I'd move out the way that's for sure