Robert Maxwell wrote:
In other words, this is a much, much more difficult problem than people may assume.
The thing is that even if all dolphins used the same language throughout the world and even if it was largely based on vocalization, we could still be facing an even bigger problem. They have amazing hearing that could recognize subtleties in sound that we are probably not even looking at. If these are part of a any form of communication, we can be very far from understanding it. We might as far as looking at a waveform of human speech is close to hearing it.
Hey, to some people like Bill O'Reilly even human languages from the other side of the planet sound like gibberish, you can't possibly expect us to figure out dolphin any time soon now, do you?.
Nah, hopefully, we're more clever than that.
If they can vocalize beyond human range, that's not a big deal, because we have sensors for that. It's not as if humans would be actively listening to and trying to interpret the sounds. Sensors fed into a computer would capture the sounds, including subsonic and ultrasonic ones. The hard part would be determining what they mean.