I found this in Phoenix, AZ and I looked at it and was like, "Is that a Musical Siren??????". Based on the fact that it has a vent coming out of it, it's probably just a big exhaust fan of sorts. https://www.google.com/maps/@33.4487605,-112.0751238,3a,15y,102.18h,118.99t/data=!3m7!1e1!3m5!...