Sound waves send vibrations through the membranes and fluids of the ear. Impulses along the cochlea create information that is then transmitted to your brain, where it is translated and understood to be your name. The most likely direction of the origin of the sound is also determined. Your brain then sends signals to the muscles and connective tissues in your neck, head, and back to cause you to turn your head in the direction of the sound.
Work Step by Step
This is a heavily simplified process. Your answer may vary depending on how much detail you decide to give, or what steps you choose to highlight.