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Re: Unknown biological sound

To: AUDITORY@xxxxxxxxxxxxxxx
Subject: Re: Unknown biological sound
From: R K Moore <r.k.moore@xxxxxxxxxxxxxx>
Date: Thu, 10 Dec 2009 18:03:15 -0000
Approved-by: r.k.moore@xxxxxxxxxxxxxx
Comments: To: Linda Sebastianutto <sebast@xxxxxxxx>
Delivery-date: Thu Dec 10 13:06:16 2009
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... sorry, I forgot to add that it was the audible two-syllable structure (resulting from forward and backward strokes) that made me think of stridulation - R

> -----Original Message-----
> From: R K Moore [mailto:r.k.moore@xxxxxxxxxxxxxx]
> Sent: 10 December 2009 18:01
> To: 'Linda Sebastianutto'; 'AUDITORY@xxxxxxxxxxxxxxx'
> Subject: RE: [AUDITORY] Unknown biological sound
> 
> I just performed some simple signal processing on the sample
> (specifically some upward pitch shifting in order to be able to listen
> to the sounds more comfortably), and I found that the result sounded
> somewhat similar to some ant sounds that I've been working on recently.
> In common with many insects, ants 'stridulate' (i.e. rub one part of
> their body on another), and this gives rise to a rhythmic underlying
> structure to their calls.  Are there sea creatures that generate sound
> in a similar fashion?
> 
> Roger
> 
> _____________________________________________________________
> 
> Prof ROGER K MOORE BA(Hons) MSc PhD FIOA MIET
> 
> Chair of Spoken Language Processing
> Speech and Hearing Research Group (SPandH)
> Department of Computer Science, University of Sheffield,
> Regent Court, 211 Portobello,
> Sheffield, S1 4DP, UK
> 
> e-mail: r.k.moore@xxxxxxxxxxxxxx
> web:    http://www.dcs.shef.ac.uk/~roger/
> tel:    +44 (0) 11422 21807
> fax:    +44 (0) 11422 21810
> mobile: +44 (0) 7910 073631
> 
> General Chair: INTERSPEECH-2009 http://www.interspeech2009.org/
> ________________________________________________________________
> 
> > -----Original Message-----
> > From: AUDITORY - Research in Auditory Perception
> > [mailto:AUDITORY@xxxxxxxxxxxxxxx] On Behalf Of Linda Sebastianutto
> > Sent: 10 December 2009 17:04
> > To: AUDITORY@xxxxxxxxxxxxxxx
> > Subject: Re: [AUDITORY] Unknown biological sound
> >
> >
> > Dear list members,
> >
> > Just let me explain a little more in detail:
> > Dr.Lennox was right: the clicks were probably due to mic handling,
> > moreover I filtered and amplified the sound because it was really
> soft.
> > The sound I want you to pay attention to is the set of very close
> > pulses.
> > All of the recorded sounds have the same structure: they last few
> > seconds (3/4) and they occur "randomly" -one every 10/15 minutes-
> from
> > 2 to 6 a.m.
> > The aim of the acoustic survey was to monitor another fish species,
> > Sciaena umbra, which made choruses during night in the reproductive
> > period (july and august). This misterious sound started right after
> > Sciena umbra ended the chorus. I add an image with spectrogram and
> > waveform In the same area there are other soniferous fish species:
> > maybe this is a new one - or a common one with unknown acoustic
> stimuli
> > :)
> >
> > if it is a machine I am curious to know which one produces a sound
> like
> > this: in the survey we must distinguish between biological and human
> > sources of noise
> >
> > thank you very much
> > Linda
> >
> >
> >    Quoting "Bruno L. Giordano" <bruno.giordano@xxxxxxxxxxxxxxx>:
> >
> > > I have to agree with Peter: I would be very surprised if this was a
> > > biological sound.
> > >
> > > It sounds too regular and sustained to me, although the 21st
> century
> > > man might have developed a mistaken identification bias to survive
> in
> > > a modern jungle of living agents and evil machines, where seahorses
> > > (and
> > > woodpeckers) are rare and harmless ;-)
> > >
> > > 	Bruno
> > >
> > >
> > > Jazz wrote:
> > >> Sounds like a Sea-horse, But lots of Fish make similar soundsthere
> > >> are more to listen to on the websight below
> > >> http://www.dosits.org/gallery/fishnbay/15.htm
> > >> Jazz
> > >>
> > >>
> > >> http://www.dosits.org/gallery/fishnbay/15.htm
> > >>
> > >>
> > >>
> > >> ----- Original Message ----
> > >> From: Peter Lennox <P.Lennox@xxxxxxxxxxx>
> > >> To: AUDITORY@xxxxxxxxxxxxxxx
> > >> Sent: Thu, 10 December, 2009 10:42:15
> > >> Subject: Re: [AUDITORY] Unknown biological sound
> > >>
> > >> There seem to be two sets of sounds - the clicks that sound like
> > >> mic handling noise aren't at the end, so I'm not sure if they were
> > >> what you were telling me to ignore. They're certainly much closer
> > >> to the mic than the other, continuous noise, in fact I think
> > >> they're very close.
> > >> The other noise - is it definitely animal? - How long was the
> > >> noise? - continuous or in short bursts like your sample? - it
> > >> sounds rather like a motor - could even be something like a
> > >> compressor, transmitting through the hull of a boat. There seems
> to
> > >>  be some reverberation there which I assume results from the
> > >> source-mic distance (and certainly it doesn't sound like very deep
> > >> water) but it could be be structural reverberation if it actually
> > >> came from an object with a rigid body such as a boat.
> > >> I'll be happy if you find out what it is!
> > >> Regards
> > >> ppl
> > >>
> > >> Dr Peter Lennox
> > >>
> > >> Director of Signal Processing and Applications Research Group
> > (SPARG)
> > >> School of Technology, Faculty of Arts, design and Technology
> > >> University of Derby, UK
> > >>
> > >> p.lennox@xxxxxxxxxxx
> > >> (01332) 593155
> > >> http://sparg.derby.ac.uk/SPARG/Staff_PLX.asp
> > >>
> > >>
> > >> -----Original Message-----
> > >> From: AUDITORY - Research in Auditory Perception
> > >> [mailto:AUDITORY@xxxxxxxxxxxxxxx] On Behalf Of Linda Sebastianutto
> > >> Sent: 10 December 2009 14:43
> > >> To: AUDITORY@xxxxxxxxxxxxxxx
> > >> Subject: Unknown biological sound
> > >>
> > >> Dear list members,
> > >>
> > >> During a nocturnal acoustic survey in shallow waters in the
> Northern
> > >> Mediterranean Sea my colleagues recorded some strange sounds of
> > >> unknown origin.
> > >> You can find an example in attachment; it is band-pass filtered
> (50
> > -
> > >> 600 Hz), and amplified. Please try to ignore the "clicks" at the
> end
> > >> of the sound.
> > >> Does any of you have an idea of what kind of animal emits a sound
> > >> like this? Maybe a fish?
> > >>
> > >> Thank you in advance
> > >> L Sebastianutto
> > >>
> > >>
> > >>
> > >> Linda Sebastianutto, PhD student
> > >> Cognitive Neuroscience Sector
> > >> International School of Advanced Studies via Lionello Stock 2/2
> > >> Trieste - Italy
> > >>
> > >> email: sebast@xxxxxxxx
> > >> tel: +39 040 3787604
> > >>
> > >>
> > >>
> > >>
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