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. Author manuscript; available in PMC: 2023 Oct 8.
Published in final edited form as: Neuroscience. 2014 Oct 22;285:107–118. doi: 10.1016/j.neuroscience.2014.10.022

Figure 2.

Figure 2

A) Modulation Power Spectra (MPS) generated from zebra finch (CONENV) and canary (HETENV) playback tapes show the temporal and spectral modulations of vocalizations recorded in the two species environments. The X axis represents the temporal modulation as oscillations of power over time. The Y axis represents the spectral modulation as oscillations of power over a short-interval frequency spectrum. HETENV stimuli contain relatively more energy at higher frequencies and longer durations than CONENV stimuli. B) Spectrograms of CONENV and HETENV from a representative 20s sample of each environment.