Bill,

The statement:

"The Q-Pads have a mixture of other materials in it, that all resonate at
different frequencies, and that is what cancels out the noise."

Sounds like Q-Pad marketing bumpf.

"It's almost like a stick-on sandbag." Well that implies mass rather than a
heterogeneous mixture that is the sound attenuating mechanism.

Alistair

PS used self adhesive roofing material (asphalt and filler matrix, quite
heavy, quite inexpensive) up to 4 layers thick on my van.

--
'82 Westy -> diesel converted to gas in '94
albell@uvic.ca
http://members.shaw.ca/albell

on 6/10/03 7:09 am, Bill Marshall wrote:

> The roofing stuff doesn't work nearly as well.  The Q-Pads have a mixture of
> other materials in it, that all resonate at different frequencies, and that is
> what cancels out the noise.  It's almost like a stick-on sandbag.
>
> This is the cheapest I've found, will be trying it soon:
> <http://www.partsexpress.com/pe/pshowdetl.cfm?&PartNumber=268-020&Did=7>