Automated classification of dolphin echolocation click types from the Gulf of Mexico
Fig 3
Normalized sound pressure level (SPL) spectra, concatenated spectra, and ICI distributions of the seven dominant click types (A-G) identified in the training datasets across five sites by the automated clustering routine. Each row of plots represents a distinct cluster in the final partition. Left: Normalized mean cluster received sound pressure level spectra (solid line) with 25th and 75th percentiles (dashed lines). N indicates the number of summary nodes included in each cluster. Center: Concatenated mean spectra of the summary nodes in each cluster. Color scale indicates relative amplitude in dB (red is high, blue is low). Colored bar across the top indicates the site from which the spectra below were extracted. Site/color pairs are: MC/Blue, GC/Green, DT/Yellow, DC/Cyan, MP/Magenta. Right: Distribution of modal ICIs.