Originally Posted by Montana Crossfire
More importantly, Why do you know the, (and I am sure I can't say it as quick as you) 1/4" visco-elastic sheet material is simular to the stuff they use on submerines hulls? You have to admit that isn't a term one hears around the pickle barrel just everday.
In the noise and vibration control world it is no secret that his type of material is used for quieting subs (surface craft too). What is secret is the exact compound and where and how much of it is used.
Rubber and other elastomers store energy and release it later in time (think of a rubber ball bouncing). The visco-elastic materials feel like and deform like rubber but have enough internal damping that most of the energy is changed to heat. Make a ball out of it and drop it and it just stops dead on the floor. I actually have a demo set of a standard golf ball and a golf ball made of Isodamp that you drop side by side to show the effect.
I used EAR Isodamp C1002 (why not?...I have it lying around.
) Here is a link to put you to sleep if you have insomnia:
http://www.earsc.com/HOME/products/D...ex.asp?SID=151
They are also one of the companies supplying the Defense Department with stuff that isn't in the catalog.
Pickle barrel talk among physicists can be unbeleivably boring. Some of them can play a mean game of pool, though!