Hi Peter,
I would recommend the Petterson Electronik D240x heterodyne & time
expansion detector:
http://www.batsound.com/psondet.html#D200series
Once it has been confirmed that those monkeys really communicate
ultrasonically, you might also have a look at our own laptop-based
system, which allows to record over longer periods of time and which
also provides a real-time spectrographic display:
http://www.ultrasoundgate.com
Best regards,
Raimund
--- In Peter Cusack <> wrote:
>
> hi
>
> on a recent trip to India i met a biologist studying Loris monkeys.
> she believes that they communicate ultrasonically, although it's not
> proven.
>
> can members of the list recommend available devices that could be
> used to detect such communications. she suspects that the frequencies
> would be relatively low in the ultrasound range, below that of many
> bats and also that the signals may not be that strong.
>
> any advise would be very helpful.
>
> many thanks
>
> peter
>
"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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