![](http://www.alamy.com/thumbs/6/D5271A88-8042-4A9B-B6C6-E42F6562AA1B/PNF3H4.jpg)
Siren, warning system, system of Helin company, to the population warning,
Size: 4480px × 6720px
Photo credit: © Jochen Tack / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: acoustic, air, civil, defense, department, disaster, emergency, fire, helin, information, loud, population, protection, signals, siren, sonus, system, volume, warning