Scott Dorsey to Anton Shepelev:
> > I am considering employment of the Tecsound
> > membrane:
> > http://www.texsa.com/en/pl39/productos/id62/tecsound.htm
> > to the internal surface of my loudspeaker cabi-
> > nets to reduce panel resonances.
> My suspicion is that this stuff mostly works by
> adding mass, and that the less mass you add, the
> less it works. It may also provide some reduction
> in radiation because of the impedance discontinu-
> ity but I suspect that isn't much.
In that case it is a rather weak solution to my
problem. I thought it added a good deal viscosity,
and therefore dissipative energy losses as well, be-
cause this membrane is said to be as effective as a
layer of lead of identical surface density, and I
think it is mainly due to its viscosity that lead is
a very effective damper:
> There would seem plenty of less expensive ways to
> add mass, some of which might also add rigidity
My primiary objective is damping via energy losses.
Sand-filled sandwiches are excellent but a su-
pererogation for my small cabinets.