Comparison of methods for rhythm analysis of complex animals’ acoustic signals
Fig 7
Deciding on a method depending on the dataset and results.
The workflow starts with simple distributional measures such as IOI analysis and nPVI calculations. Questions to be answered in subsequent order are: 1) Is a dataset periodic? 2) If so, can we infer isochrony? 3) Assuming an isochronous pattern, how to analyze exact beat frequencies best, depending on the data at hand? The sequences we analyzed fall in three of the decision paths: S. bilineata isolation calls would be best to analyze with IOI or FFT; C. perspicillata would be best to analyze with the GAT approach, while P. macrocephalus echolocation click trains should be analyzed with IOI and FFT as well.