Rumbler: Sirens you can feel

Rumbler: Sirens you can feel Drivers and pedestrians often can't hear traditional sirens from approaching emergency vehicles. The Rumbler creates low-frequency tones that penetrate solid materials and enable people nearby to feel siren sound waves.

Drivers and pedestrians often can't hear traditional sirens from approaching emergency vehicles. The Rumbler creates low-frequency tones that penetrate solid materials and enable people nearby to feel siren sound waves.

This post was originally published on Smartplanet.com