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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.