Do turtles talk to each other?

Snapping Turtle. Photo courtesy April Severin 
It's rarely heard, and not by people over 40 years-old, and usually with special equipment underwater, and out of their natural habitat it stops: Turtles do vocalize and we think it's pretty sweet. (see link to article below)

But we wonder about the conditions for the turtles of Cootes, swimming in a noisy environment filled with the sounds of traffic.

If anyone knows more about turtles communicating, feel free to pipe-up in the comments!