(1, 4) −
The widest mismatch at low order. Long nodal bands bow toward the free edges.
- Plate
- Square, free edges
- Mode numbers
- m = 1, n = 4, minus combination
- Shape
- cos(1πx/a)cos(4πy/a) − cos(4πx/a)cos(1πy/a)
- Wavenumber k·a
- 12.95 (a = 240 mm)
- Frequency
- 717 Hz on the reference plate