[Elecraft] KAT100 ATU and floor tile

[Stuart Rohre]

Two ways to attenuate sound:   Absorb it in sufficiently great transmission
loss material such as carpet tile, rough side toward sound source, and near
enough to not allow the sound to spread much before its trapped, and
increased density of the case by such as installing sides of lead, or a
double box with heavy material like sand in between.

The TL (transmission Loss) of building materials is often given on the box
of ceiling acoustic tiles, carpet tiles, etc.   Look up key words
"Acoustic Transmission Loss" on google.com for industry white papers on how
to pick acoustical attenuation materials.
72,
Stuart K5KVH