18/11

18/11, the undecimal neutral sixth, is the octave complement of the difference between the 11th and 9th harmonic.

Interval information

Ratio	18/11
Factorization	2 × 32 × 11-1
Monzo	[1 2 0 0 -1⟩
Size in cents	852.5921¢
Name	undecimal neutral sixth
Color name	1u6, lu 6th
FJS name	[math]\displaystyle{ \text{M6}_{11} }[/math]
Special properties	reduced
Tenney norm (log2 nd)	7.62936
Weil norm (log2 max(n, d))	8.33985
Wilson norm (sopfr(nd))	19
[sound info]
Open this interval in xen-calc

See also

• 11/9 its octave complement
• Iceface tuning
• Gallery of just intervals