The Squeaky Wheel is the nickname given by radio listeners to a utility shortwave radio station that used to broadcast a distinctive sound. From around 2000 until 2008 this station sounded much like a squeaky wheel. From 2008 the channel marker changed to two different tones in a short sequence repeated with a short silent gap. The frequencies were 5473 kHz (day) and 3828 kHz (night). Several times voice messages in the format of Strategic Flash Messages have been reported.