For some reason I can't download the sound files.
However I've been interested in quantifying the similarity/differences
between songs of several birds.
One approach that has worked quite well for identifying different songs
in a single individual's repertoire (see
http://math.uc.edu/~pelikan/Dora/revi4/revi4.html for an example) groups
songs based on correlations between sonograms/spectrographs.
A second approach selects specific elements from representative songs
and estimates the similarities of these "probe" elements to the elements
that appear in each individual's song. Subsequent multivariant analysis
(like clustering) serves to group the songs of different individuals
into similarity classes. This has worked like a charm for Northern
Cardinals.
Finally, if you can decide on (at least as a hypothesis) certain
specific parameters by which the songs may vary (lowest frequency
present, rate of repetition of a certain element, etc.) you can measure
these directly for each song. I did this with fairly good effect for parids.
If any of these approaches sound like they might be useful, you're
welcome to software I've written to carry out the procedures.
Good luck!
Steve Pelikan
dobroide wrote:
>
>
> Hello group,
>
> lately I'm listening to male blackbirds from different places, and
> can't but notice there are important differences among them. Uploaded
> a couple files to illustrate this, although I guess this is most
> likely a long-known fact:
> http://f1.grp.yahoofs.com/v1/8KV9RgPYQ4S66tdYwv3UuFA-Hwoa4eZBd3ABs8HKsvuLwWZZyK9koy1oH5uCAEBzn30haxJFOxaUAktNKBtUx_e-DNvP4A/Member%20Files/20070603.blackbird.pinewood.mp3
>
> <http://f1.grp.yahoofs.com/v1/8KV9RgPYQ4S66tdYwv3UuFA-Hwoa4eZBd3ABs8HKsvuLwWZZyK9koy1oH5uCAEBzn30haxJFOxaUAktNKBtUx_e-DNvP4A/Member%20Files/20070603.blackbird.pinewood.mp3>
> http://f1.grp.yahoofs.com/v1/8KV9RrPFhdK66tdYUyDvRVTAi3FDDo99YA8FedCR-NDXNK__0HBIzBFyhxb3pPcVWMWqln25gZujQ7e4dEL_eEj2VqT96Q/Member%20Files/20070616.blackbird.city.mp3
>
> <http://f1.grp.yahoofs.com/v1/8KV9RrPFhdK66tdYUyDvRVTAi3FDDo99YA8FedCR-NDXNK__0HBIzBFyhxb3pPcVWMWqln25gZujQ7e4dEL_eEj2VqT96Q/Member%20Files/20070616.blackbird.city.mp3>
> (my first files to the group, unsure if I did it/linked right,
> apologies if I didn't)
>
> Anyway, I was wondering... do any of you know if there is software to
> quantify and callibrate differences by analyzing songs? I certainly
> can distinguish some differences by ear, identify recurrent 'words'
> and the like, but it would be nice to achieve this in a quantitative
> way... Any hint?
>
> Cheers
>
> Dob
>
> ps
>
>
>
>
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