This wash is located at 1806 S 12th Ave W, Newton IA Intro Music: Qualities of Religion - Bjorn Lynne (Authorized used of this track licensed under Shockwave-Sound.com)
They’re just Federal Signal buzzers, many of which used for fire alarm systems. The reason they are that loud is for fire alarm systems of course, but also so that they are audible almost anywhere, including inside your car.