(2, 4) −
An even pair. Nested cells with a diagonal seam cutting through them.
- Plate
- Square, free edges
- Mode numbers
- m = 2, n = 4, minus combination
- Shape
- cos(2πx/a)cos(4πy/a) − cos(4πx/a)cos(2πy/a)
- Wavenumber k·a
- 14.05 (a = 240 mm)
- Frequency
- 843 Hz on the reference plate