960/853

Interval information

Ratio	960/853
Subgroup monzo	2.3.5.853 [6 1 1 -1⟩
Size in cents	204.5864¢
Names	EAS Attention Tone, EAS major second
Color name	853uy2
FJS name	[math]\displaystyle{ \text{M2}^{5}_{853} }[/math]
Special properties	reduced
Tenney height (log2 nd)	19.6433
Weil height (log2 max(n, d))	19.8138
Wilson height (sopfr(nd))	873
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960/853 is an interval extremely close to the Pythagorean major second 9/8, differing by the unnoticeable superparticular comma of 2560/2559.

Sine tones with frequencies of 960Hz and 853Hz, sounded together, comprise the "Attention Tone" used by the U.S Emergency Alert System over public broadcasting. Using these exact tones over broadcast media is illegal in the United States, in order to protect the integrity of the system.