David, your experiment concludes nothing.
Why?
1) You did not try the experiment with and without the Walker links
connected.
2) You (we) do not know that making a call causes the pulsating sound
described by Somut. I have experienced the sound he is describing, and never
was it the result of making a call on a cell phone. However, the sound was
always caused by a powered-up cell phone sitting idle within about ten feet
from the electronics.
3) From my experience with this phenomenon, proximity to the speakers is
not the cause. Proximity to the electronics is the cause.
I will go out on a limb and venture a guess that in Somut's system, under the
conditions in which the cell phone caused the vibrating sound in his
speakers, the Walker Links would have absolutely no effect in eliminating the
sound.