I do not see any of your links clearly stating that the turkey spit and/or drum is an "infrasound" of frequencies lower than the human threshold of sounds at low frequencies. Without this, your theory, quite frankly, is debunked. Yes, Elephants may utilize this type of communication at a HIGH INTENSITY (db) level and low frequency (to better move around obstacles), but lets face it TC, TURKEYS ARE NOT ELEPHANTS. They are not even in the same subspecies within the animal kingdom. If you would like to talk more about elephants and their communication techniques, you should probably frequent the Elephant and Elephant Hunting website and their subsequent forums. Maybe those folks there would believe your assumptions that a turkey communicates exactly like an elephant! In the meantime, I think we can all agree that we can in fact hear the drum and it is probably at a low frequency of some sort, but does it travel for umpteen miles? NO, i say. Not likely. Can other birds hear it for umpteen miles? Maybe, I'm not sure. I do know one thing though I hear gobbles every time I go out turkey hunting and that is probably a higher frequency than that of a drum. Measure the amplitude of the sound wave and you will have your answer on which travels farther! simple as that. The math behind sound principles do not lie. These people that come up with the Equations spend much of their life studying it and it must be recognized by their peers and accepted as being correct before it is even thought about being published in books to teach others. They have much more credibility than you or me and should not be taken with a grain of salt, as google and wiki clearly represents. Good god
"After eating an entire moose, a mountain lion felt so good he started roaring. He kept it up until a hunter came along and shot him. The moral: When you're full of bull, keep your mouth shut."