For the diagram below, a siren is going off in the distance to the left. The
diagram shows the diffraction of the siren's sound wave around the wall. If
you were behind the wall (position labeled "X") what would you hear?
Sound waves
from source to
the left, rooving
to the right.
OA. You would not hear anything because there is no sound wave at
that position.
OB. You would not hear anything, because the wall would block the
sound of the siren.
OC. You would hear the siren, but the pitch would sound higher.
OD. You would hear the siren and think it was located at the opening in
the wall.