Wed Oct 06, 2021 12:24 am
G'day everyone.
Lightningfun64 and I have made a somewhat of a major breakthrough on this. We found a news article from WW2, which states that these sirens were designed by Swedish engineer - Harold Ekman, and manufactured by Swedish Electric Co.
Sydney had the first order of them, supposedly their coverage was good, reaching up to 5-8 miles if the conditions were optimal.
Before these sirens could be ordered, it says that tests were conducted in many environments, including Sweden, and London, to map out coverage, and also how effective it is against city traffic. It says that "100 are already in the process of being made", so we know that many of these units existed.
Unfortunately, we could not find a model name, but the manufacturer is a massive break through. We'll keep looking for more information.
Thanks for coming to my TED talk.
Siren Enthusiast from Australia since 2012. Designer of the KEYTROL-K4 Siren Controller.