KalmiaLatifolia
commented
1 month ago I've been able to guess some but not all of the indices:
ACI = Acoustic Complexity Index BGN = background noise CVR = acoustic cover DIF = ? ENT = temporal entropy Ht OSC = ? RHZ = Ridges, horizontal RNG = Ridges, negative slope RPS = Ridges, positive slope RVT = Ridges, vertical SPT = spectral peak tracks SUM = ? PMN = Power Minus Noise
ZeroSignal High Amplitude Index Clipping Index AvgSignalAmplitude BackgroundNoise Snr AvgSnrOfActiveFrames Activity EventsPerSecond SpectralCentriod HighFreqCover MidFreqCover LowFreqCover AcousticComplexity TemporalEntropy EntropyOfAverageSpectrum EntropyofVarianceSpectrum EntropyOfPeaksSpectrum EntropyOfCoVSpectrum ClusterCount ThreeGramCount Ndsi SptDensity
atruskie
«Definitions of acoustic indices»
Currently, it is very difficult to find what each of the acoustic index outputs are. The output CSVs use abbreviations for each acoustic index. While some of these are commonly known (e.g. ACI) others are more difficult to guess, or the method of calculating the index isn't clear.
Proposal:
It would be useful to have somewhere on the github, or included in the README, or in the documentation, a list of all of the abbreviations of all the indices, and how those indices are calculated.
Alternatives:
There are some unpublished reports and published papers by Towsey which give definitions of some of the AP indices which I have been using, but it is ambiguous whether the definitions in these papers are the same methods used in the current version of AP.exe, and not all of the current AP index outputs are included in these older reports.
Additional context
These are the existing documents I've found which contain some index definitions: https://eprints.qut.edu.au/110634/ https://eprints.qut.edu.au/216373/ https://doi.org/10.1016/j.procs.2014.05.063