Vacarme en haute mer

If you listen to "the world of silence" with the super-powered ear of a marine mammal, you are immediately drowned in growling, groaning, wailing and whistling. In this world where vision is limited to twenty meters, everything is communicated by sound. Thanks to many experiments conducted in the field for the "Unsilent World", you will discover how dolphins can communicate, or how whales can converse at a distance of 4,000 kilometers. But you will also find out that the most sinister of pollutions is under way, and it is about to render mute this world. (officiële tekst van distribiteur)