Do Elephants talk out of their ass?

[mistermack]

We humans talk by modulating the exit of gases from our lungs.

Animals like elephants release a huge quantity of gas from their ass, and I just wondered if anybody has actually studied whether they can pass messages by modulating their farts? This is a serious question.
We had a kid at school who could nearly say "bollocks" by farting, and humans don't emit anything like the volume that elephants do.

Also, many animals communicate by pissing, so it's not particularly far-fetched.

If an elephant asks you to pull his trunk, just say no.

[macdoc]

not likely but they do communicate long distance by infrasonic rumbles.
http://www.light-science.com/articles1003.html