You can hear sound through an open window from sources that are not in your line of sight because of
A)interference.
B)diffraction.
C)the sound level.
D)the Doppler effect.
E)none of the above.

Question

Quizplus · Accepted Answer

This is due to diffraction - the bending of sound waves as they encounter an obstacle, such as the edge of an open window. The sound waves are able to "spread out" and reach your ears, even if the source of the sound is not directly visible.

You Can Hear Sound Through an Open Window from Sources