Hi Gianni,
I agree with your thoughts.
Those who are interested in such ultrasonic communication signals
might visit the following pages:
http://www.avisoft.com/sounds.htm#insects
http://www.avisoft.com/sounds.htm#bats
http://www.avisoft.com/rats.htm#samples
The recently published scientific paper on the ultrasonic songs of
mice is available here:
http://tinyurl.com/7s3te
Regards,
Raimund
Gianni Pavan wrote:
> I would now consider a different point of view. Recording at high
> sample rates is important for studying sounds used by animals to
> communicate and to echolocate.
...
> A further motivation for extending the bandwidth is to have
control
> on the whole acoustic context. In studies about communication in
> mices it has been discovered that other than audible sounds,
> ultrasonic sounds up to 90 kHz are used for communication.
...
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