Every day when I drive my car to and from my job I
drive under bridges and arches. Figure 1 shows a
bridge. Figure 2 shows an
arch. Inside my car I usually listen to
radio. My favorite radio is 680 News Radio.
The radio station works on 680- kHz.
This radio transmits useful
news for me. It's
the weather, what is and what will be news in Toronto
and the World, as well
as local traffic, which road is
open, what the road is closed due
to an accident construction. Knowledge
of the traffic saves
me a lot of time.
I noticed that volume of the 680-News usually
is changed when I drove under a bridge or
under an arch.
As usual the level
of volume is drop down when I drive under an arch. There are some
arches (very small quantity) that do not affect
to receiving. Figure 3 shows area of decreasing reception under the arch. Arch
does decreasing of reception for any station at MW Band. Arch
does not affect to station at FM-Band.
The arch has stable
behavior in influence to the MW station. If an arch does decreasing
in reception so the arch always does the decreasing. The effect
exists in summer, in winter, in rain, in snow,
in traffic and on empty road.
If an arch does not
influenced to radio reception the arch always does not influenced
to this one. It is right for summer, for winter, for rain, for snow,
for traffic and for