960/853: Difference between revisions
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'''960/853''' is an interval extremely close to the Pythagorean major second [[9/8]], differing by the [[Unnoticeable comma|unnoticeable]] [[superparticular]] comma of 2560/2559. | '''960/853''' is an interval extremely close to the Pythagorean major second [[9/8]], differing by the [[Unnoticeable comma|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 [[wikipedia:Emergency_Alert_System#EAS_header|Emergency Alert System]] over public broadcasting. Using these exact tones over broadcast media is [[wikipedia:Emergency_Alert_System#Tone_usage_outside_of_alerts|illegal in the United States]], in order to protect the integrity of the system. | Sine tones with frequencies of 960Hz and 853Hz, sounded together, comprise the "Attention Tone" used by the U.S [[wikipedia:Emergency_Alert_System#EAS_header|Emergency Alert System]] over public broadcasting. Using these exact tones over broadcast media is [[wikipedia:Emergency_Alert_System#Tone_usage_outside_of_alerts|illegal in the United States]], in order to protect the integrity of the system. | ||
Revision as of 07:20, 3 January 2024
| Interval information |
EAS major second
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.