16/11
16/11 |4 0 0 0 -1>
648.68206 cents
In 11-limit Just Intonation, 16/11 is an undecimal subfifth measuring about 648.7¢. It is the inversion of 11/8, the undecimal superfourth. While the name suggests some variation of a perfect fifth, the subfifth is generally considered an interval in it's own right being like neither a perfect fifth nor the tritone. The character is something very unique in that it produces a sound of overtones that resembles that of a large bell.