Fig. 3. High-resolution recording of an animal steering towards the left speaker, which presented a sound pattern at 75 dB. (A) Each chirp released a steering velocity transient to the left whereas the forward velocity was only weakly modulated by the stimulus pattern. Each steering transient caused a shift of the animal's path to the left. (B) Averages of the velocity components demonstrate the strong modulation of the steering velocity in the chirp rhythm and the weak modulation of the forward velocity. As a consequence, the animal's deviation to the left was modulated by the sound pattern.