18/11

Interval information

Ratio	18/11
Factorization	2 × 32 × 11-1
Monzo	[1 2 0 0 -1⟩
Size in cents	852.5921¢
Names	undecimal neutral sixth, Alpharabian tendoneutral sixth
Color name	1u6, lu 6th
FJS name	[math]\text{M6}_{11}[/math]
Special properties	reduced
Tenney height (log2 nd)	7.62936
Weil height (log2 max(n, d))	8.33985
Wilson height (sopfr(nd))	19
Harmonic entropy (Shannon, [math]\sqrt{nd}[/math])	~4.2586 bits
[sound info]
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18/11 is an undecimal neutral sixth, and the octave complement of 11/9, the difference between the 11th and 9th harmonics. As this is the larger of two 11-limit neutral sixths obtained by modifying Pythagorean intervals by 33/32, it is dubbed the Alpharabian tendoneutral sixth in Alpharabian tuning.

See also

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