That would have triggered all of the sirens at once, making the replay attack more likely than other hypotheses. "Such a replay attack could be accomplished with a software defined radio (SDR) or ...

The Ventura County Sheriff's Department is adding the hi-lo siren to about 130 of its patrol vehicles. The objective is simple: Leave if you if you hear it during a wildfire, flood or any major ...

The sound of Dallas's 156 emergency sirens blaring in unison unsettled many of the city's residents. They sounded about 15 times in all, with each signal lasting 90 seconds---all the while, with ...

Residents in Winnebago County are raising concerns after learning that many of the county’s tornado sirens aren’t working.

SoundOff Signal's 500 Series Siren includes built-in bluePRINT functionality. Users can control two lightbars without an external BOB. Includes enhanced input/output (I/O) capability with the same ...

A similar incident occurred in Lemont, Ill., in 2012, when an unauthorized signal triggered that town’s seven radio-controlled sirens. Officials there employed a similar fix, encrypting the signal.

A drop in radio signal caused Nashville's tornado warning system to repeat a siren cycle on Wednesday night. Some residents found the repeated siren confusing or frightening, but the Office of ...

Police in Crowley, Louisiana used a siren from the horror movie "The Purge" to signal the start of curfew in the city amidst the coronavirus pandemic.

Emergency sirens have several different meanings depending on the tones– however, many people seem unclear on what exactly they're signaling. The Tulsa Area Emergency Management Agency controls ...

While you expect to hear Dallas’ outdoor warning system during a severe weather event, the sirens don’t always signal danger at other times. The city’s office of emergency management tests ...

The siren is used to signal the beginning of the Purge. It can be heard in most of the franchise’s trailers, including the most recent movie, “The First Purge. ...