Wow! Gianni, that sounds neat! I now have SeaWave installed on all my lapto=
ps : )
Hmmm...Well, I'll be putting it through it's paces when it arrives (and rep=
ort back here). I'll also be doing comparisons, to my current (Frequency di=
vision & Heterodyne) detectors. I can hardly wait 'till it gets here! : ) T=
omorrow, I hope!
Best regards,
-Al
--- In Gianni Pavan <> wrote:
>
> Hi,
> if you use the Ultramic200 with SeaWave, even on a small tablet or
> netbook pc you can record to disk at 200k sampling and see the spectrogra=
m
> on the screen. THEN you can play back the files with the "Play speed" opt=
ion
> (in the "basic settings" panel) at reduced speed while maintaing the corr=
ect
> frequency/time measures on the spectrogram display.
> I'm now working to add to seawave an option, already developed for our ow=
n
> research on dolphins, that allows - while recording and displaying - to
> shift in real-time a 20 kHz frequency band down to audible range, e.g. 60=
-80
> kHz down to 0-20 kHz; if working in 2 channels mode (but the input signal=
is
> still mono) you can get on the headphone two shifted bands, e.g. 40-60kHz=
on
> the right channel and 60-80 on the left channel. A further option still i=
n
> development allows to "compress" the spectrum into the audible range, of
> course with artifacts, but still useful to "hear" the ultrasounds.
>
> Gianni
>
>
>
> 2011/4/8 Avocet <>
>
> >
> >
> > < I'm still "recovering" from the discovery that this new microphone
> > is not only able to record at 200kHz, but that it ALSO performs as a
> > Time-Expansion bat detector! Amazing! Until now, the only way to get
> > time expanded recordings of bats: Was to dig deep into your wallet
> > =A3=A3=A3/$$$...The lowest cost unit (that I was thinking of buying mys=
elf)
> > cost =A3468.20 !
> > <
> > <This is awesome!!
> >
> > Al,
> >
> > But does it do the same job? It seems that you have to carry around a
> > computer as well and does it do time expansion in real time or do you
> > have to use a sound editor? In the field you will then have battery
> > life issues. It seems a useful gadget but I'm not getting too excited
> > for bat work. It's also limited to below 100KHz, not 200, so you've
> > lost the Lesser Horseshoes and the higher harmonics of the other
> > species. I've got IR cameras in a Lesser roost and it won't help
> > there.
> >
> > I'll probably get one though.
> >
> > David
> >
> > David Brinicombe
> > North Devon, UK
> > Cogito cogito ergo cogito sum - Ambrose Bierce
> >
> >
> >
>
>
>
> --
> 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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