Chapter 1: The Sound Nobody Else Hears

Context is everything. I learned this mixing tracks at Underwater Studios on Gowanus Street, where the difference between a hit and a demo reject was often just three decibels at 2.4 kilohertz. The ear knows before the brain knows. The body registers frequencies the conscious mind hasn't cataloged yet.

Which is why I noticed the sound six weeks before I understood what I was hearing.

It started on the F train—where everything in my life seems to start or end, as if the Metropolitan Transit Authority were some kind of narrative destiny, a plot-structure oracle I consulted twice daily. I was standing near the door, watching a man in his sixties read the Times with the absorption of someone who still believed newspapers could explain the world, when I heard it. A high whine, almost ultrasonic, vibrating at maybe 17,000 hertz, right at the edge of adult hearing range. I touched my ear the way you touch a piano key you suspect is out of tune. The sound spiked, peaked, then dropped to nothing.

The man lowered his newspaper and stared at the tunnel wall sliding past the window, his face suddenly empty in a way that faces shouldn't be empty—not confused, not sad, just erased, like someone had dragged the transparency slider in Photoshop all the way to the left.

"You okay?" I asked.

He looked at me without recognition, though we'd been standing three feet apart for six stops. "Do you know what station this is?"

"York Street. Next stop is Jay Street."

"Right. Of course." But he kept staring at the tunnel wall like it was a language he used to speak.

That was the first one. The forgetting.

By the second week I'd logged fourteen instances—all strangers, all accompanied by that same impossible frequency I couldn't record on my phone or my field recorder or any device I pointed at the people making the sound. Making it or suffering it. The semantic ambiguity was the problem. Were they generating the frequency or receiving it? Was this emission or reception?

I started following people after I heard the sound—casual stalking, detective-style, the kind of thing you justify by telling yourself it's research, not compulsion. A woman leaving Whole Foods forgot which car was hers. A teenager at the Atlantic Avenue platform forgot his mother's face mid-conversation, had to check her contact photo to remember. A barista at the coffee shop on Dean Street forgot how to make a cappuccino, stood there holding the steam wand like an artifact from a civilization she'd only read about.

The sound was always the same. Always 17,000 hertz, give or take fifty. Always followed by erasure.

Nobody else heard it. I tested this. "Did you hear that?" I'd ask whoever was nearest. They'd look at me the way people look at someone talking to themselves, which is to say they wouldn't look at all. New York eye-slide, the practiced art of un-seeing.

I heard it seventeen times yesterday.

I'm hearing it now.