Any frog will tell you (albeit in a series of unintelligible croaks) that the ability to be able to project your voice across a vast territory is crucial for survival. For our amphibious friends, this comes down to the usual squabbles around territoriality and securing a mate. But for professionals with an interest in training (and a warped imagination) there is a definite link, here, to the human realm and the world of organisational culture.