If you don't hear the siren, police are sure you'll feel the Rumbler

The Los Angeles Police department announced its intention to install the low-frequency Rumbler siren into 20 black-and-white ...
The Mirror US on MSN

LAPD rolls out new rumblr siren that can penetrate through 'solid materials'

A test pilot for the new low-frequency Rumbler siren system for Los Angeles Police Department vehicles is underway ...

Police sirens started with a 19th century French scientist

It’s an odd idea, right? And it’s one humans only discovered in the early 1800s.
Hoodline

LAPD Adds Chest-Thumping Rumbler Sirens, Critics Call It Acoustic Assault

The technology, developed by Illinois-based Federal Signal, works by interacting with a standard police siren and amplifying ...
Autoblog

Tulsa police testing booty-shaking Rumbler sirens

In a move sure to please more than a few motorists, police in Tulsa, OK are testing new sirens on their patrol cars with a tone low enough to send vibrations through targeted vehicles and their ...