From: "Stuart Fairbairn" <>
>
> Somewhere in the archives there is a recording of the echo location sound=
used by a bat in persuit of prey. The repitation rate increases as the bat=
closes on the prey. The recording has been modified to bring the sound wit=
h in human hearing.
>
> Do bats have other frequency calls for bat to bat communication or is the=
echo location frequency specific to the species? Perhaps the size and shap=
e of the resinator in the bat's head sets the frequency. If so, then commun=
ication might be by pulse rate variation.
I'm no expert, but in my reading it appears that bats have a bunch of
different calls for each species. Roost calls, for instance, seem to be
much lower frequency than flight calls.
I'm sure there are limitations, caused by their anatomy and physiology.
Just as there are with any animal.
Note that many very small mammals make calls of very high frequency.
They are just less studied.
Walt
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