Hello everyone, I am the owner of the HLS website. Thanks Brendan for your mail. We noticed the video some time ago and have been looking for the location ourselves for a while. The video definitely shows an HLS. Unfortunately, we have not been able to find any HLS in South Korea on StreetView or ot...

Hmmm ok. But if a DC powered siren has no batteries, it is still completely dependent on the mains. So where is the advantage of using DC motors and large transformers/rectifiers over AC motors? On the other hand, there are battery-powered electronic sirens that are charged by solar energy and do no...

Hello Ziginox, Thank you for your reply! It is not my aim to reinvent the wheel or make things too complicated. My suggestion was a first attempt from a German point of view. If you already have commonly used categories, I will adopt them. I would like to have a set of accepted categories that are k...

Hello everyone, I am working on a general categorization of siren types according to their functional principle and would like to hear your opinion. And since English is not my first language, maybe you can help me find the right terms and wording. Each category is a combination of the following cri...