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Oscillograms of acoustic signals produced by male D. melanogaster during agonistic encounters. (A) Sequence of pulses produced by a male while interacting with the opponent. CF ∼300 Hz. (B) Higher magnification of a row pulses. Each pulse consists of 1–3 cycles; CF ∼300 Hz, IPIs vary between 90 and 110 ms. (C) One single pulse consisting of one cycle.
