Joel,

thanks for your response. I use "Brown Bread". It is
much less expensive than Dynamat and equally effective
in keeping panels from vibrating. And  insulating the
whole right side of my Westy made a difference,
subjectively. Feels more solid. Big difference in how
the sliding door sounds now, when I close it. But,
surprise, the noise level at highway speed didn't
change measurably, the meter doesn't lie. Damping the
panels only takes care of a narrow frequency range
were the panels can resonate. It  helps to avoid
rattles and reduces unwanted resonances in the mid and
bass range. But it did not take care of the noise
problem as much as I wanted to believe it after that
much work. I also tried sound absorbers or barriers. I
put carpet on the panels, which absorbs some higher
frequencies, and put open cell foam behind the panels,
which is a reasonable sound barrier / absorber. Stereo
sounds cleaner but still no significant improvement on
noise. Maybe the only way to reduce the noise is to
generate less? Softer / different suspension, replace
worn bearings maybe? Tires with different tread
pattern, maybe 15" rims with wider tires at lower
pressure? Basically after my mildly successful
insulating attempts I'd like to get a feel for how
much improvement I can achieve before I spend the big
$
So how noisy is your ride?
Reinhard, 83 Westy, "Moose"

--- Joel Walker <jwalker17@earthlink.net> wrote:

> > need to find a way to reduce the noise. 80 dBA is
> just
> > too much. BTW I already know that the best way of
> > reducing road noise is to slow down :-) Actually
> best
> > is not to move at all.
>
> you can cut down a lot of 'road noise' by putting
> some Silencer Strips
> (by 3M) or some Rubberized Undercoating by 3M inside
> the doors and
> behind the interior panels inside.
> spray the inside surface of the large flat panels of
> the bus's walls.
> those panels can drum significantly. i did this on
> an 88 and it really
> was amazing the difference it made.
> you can also do it under the floor in the front,
> beneath the
> driver/passenger feet. and any other flat panels you
> can get to.
> anything to stop vibrations getting to/through that
> panel. dynamat is
> another brand like the 3M stuff.
>
> good luck!
> joel
>
>

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