Supplementary Figure 3: Spectrograms of a song motif recorded with the wall microphone and the accelerometer (bird g2k8)
From: Reconstruction of vocal interactions in a group of small songbirds
(a) Spectrogram of a song motif recorded with the wall microphone. (b) Spectrogram of the same song motif recorded with the accelerometer. Abbreviations: “T” - tet calls, “I” - introductory notes, “A”, “B” and “C” – song syllables. The low-frequency bumps in acceleration that tend to occur before syllable onsets (black arrows) are presumably associated with rapid changes in air sac pressure (respiration-related thoracic movement).
