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Next: Other fluid media. Up: Waves Previous: Solutions

The 3-D wave equation for air.

We said the wave equation in air in one-dimension is


One might encounter this situation inside a long pipe. However the air in which we live is three-dimensional, so the full 3-D wave equation for air is given by


where we also include second order partial derivatives with respect to the y and z directions. We won't have occasion to use this complicated expression very much in this course, but we are including it here for completeness.

Tue Feb 25 21:24:33 EST 1997