The Siren Board

I was taking my normal vacation on Google Streetview today (I do that every day while at work LOL) and re-came across this set up at the Wood-Ridge, NJ Municipal building. No idea what exactly is may all be, sure looks like something from Willy Wonka's chocolate factory to me with all of the horns of different size. So what do we have here boys and girls?? LOL

https://goo.gl/maps/zkqUNDt5sQs