Culture & entertainment
Emergency alert tones combine two dissonant frequencies
HERE’S THE INTERESTING PART
That heart-stopping, horrifying screech that interrupts your broadcast isn't accidental. The alert system intentionally combines two clashing sine waves (usually 853 Hz and 960 Hz) specifically because they sound aggressively unpleasant to the human ear. It forces your brain out of its passive listening state through sheer acoustic irritation.
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