11/10

Interval information

Ratio	11/10
Factorization	2-1 × 5-1 × 11
Monzo	[-1 0 -1 0 1⟩
Size in cents	165.0042 ¢
Names	large undecimal neutral second, undecimal submajor second
Color name	1og2, logu 2nd
FJS name	[math]\displaystyle{ \text{m2}^{11}_{5} }[/math]
Special properties	superparticular, reduced
Tenney norm (log2 nd)	6.78136
Weil norm (log2 max(n, d))	6.91886
Wilson norm (sopfr(nd))	18
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English Wikipedia has an article on:

Neutral interval#Second

11/10, the large undecimal neutral second or undecimal submajor second, is an interval favored by Ptolemy. Coincidentally, the interval between the most common tuning frequency (A440) and the second most common AC electrical frequency (50 Hz) is exactly 44/5, or three octaves above an 11/10.

See also

• 20/11 – its octave complement
• 15/11 – its fifth complement
• 40/33 – its fourth complement
• Gallery of just intervals
• List of superparticular intervals