Rich & John--
I've definitely experienced grouse call seeming to come from the
ground at my feet. Maybe it does hug the ground in some way, John.
Another clue possibly: When interviewing a sight impaired person, I
described how I sometimes feel an approaching large truck "in my
legs" before I locate it accurately with my ears. She laughed and
said that sub hearing vibrations are very important to sight impaired
folks, "You can hear with your whole body, not just your ears."
Another woman, whose hearing is impaired said she uses the low
vibrations to feel large vehicles approaching. Triangulation with
two legs? Golly!
Rob Danielson
=3D =3D =3D =3D =3D
>To Rich Peet
>
>Low frequency sound travels really well along the ground. we can
>speculate that "throwing the voice" like a ventriloquist, casts a
>wider net for females or possibly deceives predators? Such as us?
>Blue Grouse have the same characteristics and its difficult to know
>where to point the microphone!
>
>John Neville
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Rob Danielson
Film Department
University of Wisconsin-Milwaukee
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