Industrial Wind Turbine noise – wave interference patterns

Why does Industrial Wind Turbine noise / vibration impact the health of some residents, but not others? Some say it’s genetic OWR. Could it depend on how waves from multiple sources cancel or add together?

  • If a crest of a wave meets a crest of another wave of the same frequency at the same point, then the magnitude of the displacement is the sum of the individual magnitudes – this is constructive interference.
  • If a crest of one wave meets a trough of another wave then the magnitude of the displacements is equal to the difference in the individual magnitudes – this is known as destructive interference.

To see this visually, click here:

http://en.wikipedia.org/wiki/Superposition_principle#Wave_interference

To see it with a moving picture, click here:

http://en.wikipedia.org/wiki/Interference_%28wave_propagation%29#Mechanism

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