This is a weekly tornado (air raid) siren test in Columbus, OH on Wednesday, September 27, 2017 at noon.
This particular siren is located near Nelson Rd and Franklin Park S. at coordinates 39.963, -82.94805.
The siren shown is a Whelen WPS-4000 SERIES siren on Alert Mode:
www.whelen.com/mass/product.ph...
The siren plays for about 28 seconds, then a 38 second pause, and then 28 more seconds of the siren. Of course, the tone would be longer in the occasion of a real emergency.
Some other Whelen sirens can be heard in the background.
Here is the link to a map of tornado sirens in Franklin County:
fcemhs.com/Warning/WarningSire...
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Edit: above link from 2014 doesn't work anymore, but the website was archived: web.archive.org/web/201708110...
17 окт 2017