On Fri, 18 Jul 2003 09:03:38 -0400, "Tarmo Tammaru"
wrote:

Any transducer I can think of offhand converts between mechanical energy and
electrical energy, as for instance a loudspeaker, microphone, mechanical
filter, etc.

That seems to be ignored to complement its use as analogy.


As for the impedance of free space, one way to build a stealth aircraft is
to cover it with material that has a resistivity of 377 Ohms/square. Then
there is no reflection

Tam/WB2TT


Hi Tam,

That material has been around for a couple of decades, but is quite
heavy. You might find yourself with a fleet of stealth bumper cars as
a result.

73's
Richard Clark, KB7QHC