There are only two forces in the world, the sword and the spirit. In the long run, the sword will always be conquered by the spirit.  Napoleon Bonaparte 
Vibrational Modes of DrumsDrums resonate in various ways, creating different vibrational patterns. A mathematical language has been developed to define the different resonant vibrational mode patterns in a circular membrane. The scheme involves counting the number of directions (0 means it goes in all directions) and the number of nodal rings. (Number of Directions, Number of Rings) Here are the most common drum modes. Click on the picture to see an animation of each mode.


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