The study of automobile aerodynamic noise is a field that has grown rapidly in the past decade. Automobile manufacturers and independent researchers now have a better understanding of the mechanisms of automobile aerodynamic noise. Methods of making wind noise measurements have been improved. Some fundamental wind noise reduction measures have been developed. In this paper, the basic mechanisms of automobile aerodynamic noise generation are explained. Current wind noise measurement instrumentation and techniques are reviewed. Some wind noise reduction measures found on today's automobiles are discussed. Finally, a prediction method for an idealized case of automobile aerodynamic noise is shown. Knowledge of these advances will help automobile manufacturers to design quieter vehicles.