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Typical oscillograms of acoustic signals produced by male D. melanogaster in the course of courting a female. (A) Short (0.7 s) sequence of a courtship song with sine song in the beginning, followed by pulse song. (B) Train of pulses from a pulse song. Each pulse consist of three to four cycles; CF ∼340 Hz, IPI vary between 30 and 50 ms. (C) Sine song consisting of three distinct sine bouts; CF ∼500 Hz.
