Fig. 3.

Phonotactic responses to acoustic test pulses presented before and after exposure to a sequence of species-specific song. (A) During presentation of the 100-ms test pulses (left of dashed line), the animals showed only minor responses, and lateral deviation, steering velocity, and translation velocity remained basically unchanged. Stimulation with 10 s of cricket song (right of the dashed line) elicited phonotaxis, with strong steering toward the sound source. After stimulation with cricket song, steering also occurred toward the test pulses. The translation velocity was not altered. (B) Decay time of steering response to 30 test pulses after stimulation with 10 s of cricket song. Superimposed is the exponential function describing the decay of the steering response (gray line). The average lateral deviation toward the test pulses returned to the control level after 5 s (10 chirps) from the termination of cricket song. Data are pooled from 10 crickets. Error bars indicate the SEM. Insets show the averages (n = 60) of the steering velocity to the control test pulse presented before the song (Upper Left) and to different test pulses at a particular time after the song.