I'm typically at the Park on Monday and Wenesdays from tgis time on. Here's a link to the Park's activities. Dolphins have demonstrated the ability to understand a tonal command language of up to 30 words with triple word sentence complexity. A command language however is a one way form of communication and the dolphins lack the physical capability to use human words.
Dolphins emit clicks and whistles.
Present theories are that clicks primarily serve the purpose of echo location whereas whistles are for emotional communication. These whistles would be new whistles not used by dolphins yet easily produced by them, rather than a tonal system. Apart from the issues of correct classification, frequency ranges are much broader than used in human vocalization requiring significant processing capability. This work is being undertaken at the Hawaii Sea Life Park in the Earthtrust Dolphin Lab . A unique aspect of the lab is the dolphin touchscreen , part of the equipment for developing two-way communication mechanisms.