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  1. #16
    brodeisel's Avatar
    brodeisel is offline The Cool Newb



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    Re: Sound deadening with...

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



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  2. #17
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    Re: Sound deadening with...

    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.




  3. #18
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    Re: Sound deadening with...

    Quote Originally Posted by Rudy View Post
    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




  4. #19
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    Re: Sound deadening with...

    Quote Originally Posted by martiandancer31 View Post
    if state farm would insure it i'd be driving a tank right now
    Good in traffic, easy to park?





  5. #20
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    sacsking916 is offline stayin high an loud



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    Re: Sound deadening with...

    Quote Originally Posted by Rudy View Post
    Good in traffic, easy to park?

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




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