This short clip from Arnold, PA (about a minute long) was recorded about 2-3 years ago during a fire call.
Audio....
http://media.putfile.com/Arnold-Sirens
Photos.....
http://www.jmarcoz.com/sirens/arnold1.jpg
http://www.jmarcoz.com/sirens/arnold1b.jpg
http://www.jmarcoz.com/sirens/arnold1c.jpg
http://www.jmarcoz.com/sirens/arnold2.jpg
Since the recording, the fog horn and 2T's either broke or have been shut off (don't know which), and the 5T is now an STH-10.....