There are several reasons why an electric kettle makes a whistling noise when boiling water. While water boils at a steady temperature, the temperature of the surrounding air is too high. As the temperature rises, air is dislodged from the water and forms bubbles. These bubbles expand, and eventuall

The whistle sound produced by a whistling teapot is based on the same mechanism as that of an organ pipe or flute. The length of the spout determines the pitch of the sound; a shorter spout produces a higher pitch and a longer spout makes a lower pitched whistle.