Waves and Sounds

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Superposition: Sound Wave Propagation and Interference


All waves obey a principle called superposition which allows them to occupy the same space at the same time. When they interfere, their signals combine while they pass through each other. Physically, this occurs because waves carry energy as they propagate.

In the case of sound waves specifically, intensity is proportional to the air


Sound is a(n)

wave, which means it requires a

to travel through.

Sound is also a

wave, in which the oscillation of molecules is

to the propagation of the wave.

When sound waves interfere destructively, the

acting on molecules cancel out.