Melbourne will test a terrorism alarm system

[New World Explorer]

MELBOURNE, Australia –  Melbourne will test a terrorism alarm system this month after police thwarted two alleged plots targeting Christmas-New Year crowds and a lone driver killed six pedestrians in the last year in Australia's second-largest city.

Victoria state Acting Police Chief Commissioner Shane Patton said Monday loudspeakers were being installed at over 90 sites across downtown Melbourne as part of an alarm system to be tested Dec. 28.

http://www.foxnews.com/world/2017/12/11/australian-city-melbourne-to-test-terrorism-alarm-system.html

[Tortuga]

Loudspeakers? 

That doesn't sound like an effective method of communication anymore.