Thanks for the input Gianni, Bernie & Peter - it seems automating recogniti=
on of bioacoustics is obviously more complex than 'simply' matching an imag=
e (as is done in reverse-image searching)!
--- In Gianni Pavan <> wr=
ote:
>
> 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 set=
s
> and require training with known species' sounds. In any case these requir=
e
> supervision by human experts and careful tuning. Many systems work well i=
n
> 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 th=
e
> > hull=85in the 1970s and 1980s. During that period they tried to ID whal=
e 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 e=
ach
> > 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=
or
> > 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 recogniti=
on,
> > 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 init=
ial
> > analysis, and make the tagged sections of the recordings available for =
us
> > to listen to. But imagine the outrage - first they photograph all of ou=
r
> > 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 Kra=
use.
> > >
> > > 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 Kraus=
e.
> >
> > 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
>
>
>
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