Subject: Re: Unknown biological sound From: R K Moore <r.k.moore@xxxxxxxx> Date: Thu, 10 Dec 2009 18:03:15 -0000 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>... 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@xxxxxxxx > Sent: 10 December 2009 18:01 > To: 'Linda Sebastianutto'; 'AUDITORY@xxxxxxxx' > 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@xxxxxxxx > 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@xxxxxxxx On Behalf Of Linda Sebastianutto > > Sent: 10 December 2009 17:04 > > To: AUDITORY@xxxxxxxx > > 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@xxxxxxxx>: > > > > > 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@xxxxxxxx> > > >> To: AUDITORY@xxxxxxxx > > >> 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@xxxxxxxx > > >> (01332) 593155 > > >> http://sparg.derby.ac.uk/SPARG/Staff_PLX.asp > > >> > > >> > > >> -----Original Message----- > > >> From: AUDITORY - Research in Auditory Perception > > >> [mailto:AUDITORY@xxxxxxxx On Behalf Of Linda Sebastianutto > > >> Sent: 10 December 2009 14:43 > > >> To: AUDITORY@xxxxxxxx > > >> 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 > > >> > > >> > > >> > > >> > > >> ---------------------------------------------------------------- > > >> SISSA Webmail https://webmail.sissa.it/ > > >> Powered by Horde http://www.horde.org/ > > >> > > >> > > >> The University of Derby has a published policy regarding email and > > >> reserves the right to monitor email traffic. If you believe this > > >> email was sent to you in error, please notify the sender and > delete > > >> this email. Please direct any concerns to Infosec@xxxxxxxx The > > >> policy is available here: http://www.derby.ac.uk/LIS/Email-Policy > > >> > > >> > > >> > > >> __________ NOD32 4676 (20091210) Information __________ > > >> > > >> This message was checked by NOD32 antivirus system. > > >> http://www.eset.com > > >> > > >> > > >> > > > > > > > > ---------------------------------------------------------------- > > SISSA Webmail https://webmail.sissa.it/ > > Powered by Horde http://www.horde.org/