It didn't matter.
Silence. Then the normal city sounds: traffic, a seagull, someone's phone ringing. deep throat sirens
The transmission ended. The city was silent except for the sound of ten thousand people crying, laughing, vomiting, or simply standing still, waiting for the next note in a song only their bones could hear. It didn't matter
Elias pressed his bloody palm to the window. The man across the street had stopped walking into his door. He was standing still, head cocked, as if listening to something beautiful. The transmission ended
The answer, after twenty years of black-site research, was the DS-Mk9 "Larynx" Array. Eighteen subwoofers the size of shipping containers, arranged in a geodesic circle, powered by a portable nuclear battery. When activated, they didn't play a melody or a tone. They played a modulated terror —a 16–19 Hz sweep that resonated with the natural resonant frequency of the human eyeball, the bowel, and the amygdala.