SAN FRANCISCO (KPIX) — Dozens of young people gather on a dark, San Francisco street. It’s well past midnight and they’ve come to party. The deejay cues up pulsing dance music that fills their ears and gets their bodies swaying.

Surprisingly, people asleep in nearby homes don’t realize anyone is outside, unless they happen to peer out their windows.

Welcome to the new age of “silent disco.”

In an increasingly crowded urban world, this is one way to pump up the jam without getting into a jam with the police.

The key to silent disco is special wireless headphones that let both deejay and dancer stay in sync while keeping the ambient decibel level unaffected.  read more here