"Scott Seidman" wrote in message
. 1.4...

You can yell as loudly as a whistle
can, FOR AWHILE, assuming you're not injured.....

Maybe. I remain skeptical. But volume and tenacity aren't necessarily
always the key issues, anyway. High frequency sounds carry much better
through background noise.......like rushing water, or wind in the trees.
Birds figured it out years ago. In addition, a signal note, regardless of
pitch, is much more likely to be noticed if it is of long duration. A
whistle requires relatively little air flow. It's pretty easy to hold a
note for thirty seconds or more on a whistle. Try that with a maximum
volume shout sometime.......and half a dozen or so shouts like that will
pretty much fry most people's vocal cords.

Wolfgang
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