Just because you don’t hear a sound doesn’t mean it’s not out there

“Our senses? Our senses are wrong a lot more often than they’re right. This has been proved in the laboratory. Don’t you know about all those theorems that say nothing is what it seems? There’s no past, present or future outside our own mind. The so-called laws of motion are a big hoax. Even sound can trick the mind. Just because you don’t hear a sound doesn’t mean it’s not out there. Dogs can hear it. Other animals. And I’m sure there are sounds even dogs can’t hear. But they exist in the air, in waves. Maybe they never stop. High, high, high-pitched. Coming from somewhere.”

White Noise, Don DeLillo.