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. 2017 Aug 8;12(8):e0182757. doi: 10.1371/journal.pone.0182757

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© 2017 Ricci et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 2 — Example spectrograms (left panels) and frequency-amplitude profiles (right panels) for three of the 51 kernels used. A) Kernel #5, f₀ = 149.4 Hz; B) Kernel #25, f₀ = 208.0 Hz; C) Kernel #45, f₀ = 266.6 Hz. The detection process works by pattern matching (i.e. cross-correlating in the time dimension) the individual kernels against the data spectrogram.