(3, 6) −
Three against six. The doubled ratio reads as stripes crossed by a diagonal.
- Plate
- Square, free edges
- Mode numbers
- m = 3, n = 6, minus combination
- Shape
- cos(3πx/a)cos(6πy/a) − cos(6πx/a)cos(3πy/a)
- Wavenumber k·a
- 21.07 (a = 240 mm)
- Frequency
- 1,897 Hz on the reference plate