| ▲ | pixl97 3 hours ago | |
No idea about audio frequencies close to hearing, but I'm pretty sure it's common to manipulate the brain with ultrasonic frequencies these days. | ||
| ▲ | SilentM68 2 hours ago | parent [-] | |
Yeah, I'm sure that technology has existed for decades. Common folks just not allowed to know about it. It's "for our own good!" sarcastically speaking :( | ||