To date there are no systems able to automatically recognize species by
their sound. Many teams are working on this issue worldwide, for both
terrestrial and marine species. Systems available now work on limited sets
and require training with known species' sounds. In any case these require
supervision by human experts and careful tuning. Many systems work well in
the lab, but then, in the "real world" they fail because of the difficult
to predict variability of species' behavior, habitat propagation features,
reverberation, overlap of many sounds together, anthropogenic noises, etc.
etc.
However there are cases where algorithms work well in searching and
identifying specific sound events in huge recording sets.
This is the emerging field of computational bioacoustics and I'm sure it is
worth the effort.
Our ears and eyes (to look at spectrograms) are still valid tools, in
particular if supported by our capability to use the context and a priori
knowledge to refine our findings.
Gianni
2013/7/17 Bernie Krause <>
> The US Navy actually tried match-to-sample tech on their Trident
> subs=85vehicles that sometimes had over 3200 hydrophones embedded in the
> hull=85in the 1970s and 1980s. During that period they tried to ID whale =
vox
> and several hundred signatures of fish to compare to the signatures of
> Soviet subs. Didn't work 'cause there were too many variations within eac=
h
> species and, altho, they still use something similar, it is still
> problematic in many instances. They could never overcome the problem
> introduced by Doppler shift=85objects moving at different speeds toward o=
r
> away from each other.
>
> Bernie
>
>
> On Jul 16, 2013, at 6:29 PM, Peter Shute <> wrote:
>
> > I assume there are many people working on automatic species recognition=
,
> but I don't know how reliable it is yet. I thought they still required
> verification by humans.
> >
> > But just the fact that recordings are being made and kept is a good
> thing. Maybe someone with as much resources as Google could do the initia=
l
> analysis, and make the tagged sections of the recordings available for us
> to listen to. But imagine the outrage - first they photograph all of our
> houses, then they make continuous recordings.
> >
> > It's an interesting field, and it would be good if anyone here with
> knowledge of it could fill us in on it.
> >
> > Peter Shute
> >
> >> -----Original Message-----
> >> From:
> >> On Behalf Of wildambience
> >> Sent: Wednesday, 17 July 2013 9:11 AM
> >> To:
> >> Subject: [Nature Recordists] Article: "New Technology Tracks
> >> Species by Their Sounds"
> >>
> >>
> >>
> >> Interesting article from Nature World News -
> >> http://www.natureworldnews.com/articles/3001/20130716/new-tech
> >> nology-tracks-species-sounds.htm
> >>
> >> It got me thinking of the potential of this type of
> >> technology. As each species has unique calls which could be
> >> interpreted as unique visual patterns on a spectrogram, these
> >> visuals could be automatically scanned and interpreted to
> >> produce data on species distribution and abundance, much the
> >> same way as one can search by image on Google or Tineye.
> >>
> >> Snippet - "A new cyber infrastructure developed by scientists
> >> enables real-time acoustic recording and automatic species
> >> identification in remote locations of the world, offering
> >> anyone in the world quick and easy access of not only what
> >> creatures inhabit a given area, but how many of them there
> >> are - a key to measuring nature's response to on-going
> >> climate change and human invasion."
> >
> >
> > ------------------------------------
> >
> > "While a picture is worth a thousand words, a
> > sound is worth a thousand pictures." R. Murray Schafer via Bernie Kraus=
e.
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>
> Wild Sanctuary
> POB 536
> Glen Ellen, CA 95442
> 707-996-6677
> http://www.wildsanctuary.com
>
> SKYPE: biophony
> FaceBook:
> http://www.facebook.com/TheGreatAnimalOrchestra
> http://www.facebook.com/BernieKrauseAuthor
> Twitter:
> http://www.twitter.com/berniekrause
> YouTube:
> https://www.youtube.com/BernieKrauseTV
>
>
>
>
>
>
>
>
>
>
>
>
> ------------------------------------
>
> "While a picture is worth a thousand words, a
> sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
>
> Yahoo! Groups Links
>
>
>
>
--
Centro Interdisciplinare di Bioacustica e Ricerche Ambientali
Universit=E0 degli Studi di Pavia
Via Taramelli 24, 27100 Pavia
http://www.unipv.it/cibra
http://mammiferimarini.unipv.it
"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
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