For the first time I got to test my 3d printed siren outside. It was pretty loud even out here with all the snow, I was about 15' away and I regretted not wearing hearing protection. The camera was about 15' away as well. For some reason, I wasn't able to really hear any Whelen Vortexes this time in the ambience.
[youtube]lPhQa9LBSn0&feature[/youtube]
https://www.youtube.com/watch?v=lPhQa9L ... e=youtu.be