After a successful pilot program, the NYPD is adding a new siren called The Rumbler to over 150 patrol cars; this bad boy blasts a palpable sound wave that can be felt up to 200 feet away. According to The Rumbler's manufacturer [pdf], the siren has "the distinct advantage of penetrating and shaking solid materials, allowing vehicle operators and nearby pedestrians to FEEL the sound waves and perhaps even see their effects through a shaking rearview mirror." The company also warns that the siren and speakers "may cause hearing damage," and those who use it are encouraged to wear ear protection.



