Abstract: The invention relates to an aerodynamic measurement probe of an airstream along a wall. The invention makes it possible notably to determine the attack of an airstream relative to an axial reference tangential to the wall. The invention is particularly useful in the aeronautical field. According to the invention, the probe comprises several emitters that can each emit a sound wave and a receiver sensitive to the different sound waves. Thus, there is forewarning of the receiver error that is common to all the measurements of travel time of a sound wave between one of the emitters and the receiver.