Fig. 4.
Female preference functions for stimuli with temporal elements repeated at different rates. (A) Responses to pulsed synthetic calls with insets showing the pulsatile structure of the stimuli. The standard call had a pulse rate of 45.5 pulses s−1. (B) Responses to sinusoidally amplitude-modulated (SAM) tones with insets to show the sinusoidal modulations in amplitude. All insets are approximately 132 ms in duration. Each line connects two points that correspond to the two alternatives in a given choice test (see text for details).