Global Heart, Inc.
a non-profit organization

NEW! Listen To Dolphins

Dolphin Code CD
Dolphin Code CD Icon
Music written by
the dolphins

The Project is
spearheaded by Global Heart, Inc.,
a 501(c)3 non-profit organization
based in Miami, Florida,
founded by Donna & Jack Kassewitz.

Our work has appeared on:
Research Projects

A Phenomenon Discovered While Imaging Dolphin Echolocation Sounds

August 2016 - Peer reviewed scientific paper by Jack Kassewitz and the Speak Dolphin team is published in “Journal of Marine Science: Research & Development”

The Discovery of Dolphin Language

Researchers in the United States and Great Britain have made a significant breakthrough in deciphering dolphin language in which a series of eight objects have been sonically identified by dolphins. Team leader, Jack Kassewitz of, ‘spoke’ to dolphins with the dolphin’s own sound picture words. Dolphins...

Panasonic Helps Dolphin Research

Panasonic’s Toughbook computers are rugged enough for the US military in remote regions all over the world. Now, the robust portable computers are moving into new territory – the wet, salty environment of dolphins.

PRESS RELEASE: Deciphering Dolphin Language with Picture Words

Certain sounds made by dolphins have long been suspected to represent language but the complexity of the sounds has made their analysis difficult. Previous techniques, using the spectrograph, display cetacean (dolphins, whales and porpoises) sounds only as graphs of frequency and amplitude. The CymaScope captures actua...

Acoustic Ground Hum Elimination

A simple technique to eliminate ground loop hum in a terrestrially based hydrophone monitoring system.

Hydrophones have been used for the recording and documentation of ocean events for many years. However there is an inherent problem whether you are recording on a boat or monitoring from a land based research...

Castaway & Calf Project

Article in National Geographic Dolphin Speech Link Created for Castaway's Baby Posted April 25, 2007 The team is spearheading a unique research project assisting a recently stranded, deaf, pregnant offshore bottlenose dolphin (Tursiops ...

Cooperative Games

Games with Dolphins - a Key to understanding Dolphin Language by Donna Kassewitz   An Artist's Days with Dolphins by Noel Kassewitz   Spinner Dolphins Leaf Game photos by Roberta Goodman   Games with Dolphins - a Key to Understanding Dolphin Language by Donna Kassewitz October 16, 2007 &n...

Dolphin Big Bang No Longer A Theory

Friday, 8 June 2007 Researchers in Key Largo, Florida have audio and spectrographic evidence of a dolphin stunning and disabling her prey with sound. This topic, commonly referred to as The Dolphin Big Bang, has been a hotly debated issue for many years with experts on both sides of the fence. This week Jack Kassewitz of ...

Dolphin Language Analysis

Our state-of-the-art digital recording capabilities allows us to capture the complete audio spectrum of dolphin vocalization and echolocation. Therefore we are scientifically assessing and analyzing dolphin vocalization and echolocation in ways that were impossible only a few years ago. Within these recordings we have discovered an astounding pattern of melodic modes ...

DATA - Dolphin Acoustic Trainer's Assistant

We are developing this lightweight and waterproof underwater listening system so that dolphin trainers (and researchers) can better recognize the communication between dolphins as the animals carry out their trained behaviors during dolphin swim programs and dolphin shows. We believe the portability of this system will give trainers much insight into underwater intera...

Software Weighting and Ratings System

We are developing a much needed committee called The Scientific Software and Hardware Rating Board (SSHRB). These ratings will provide brief and neutral information about the content and components in computer application programs and recording/analysis hardware that are used in bioacoustics interpretation of sound and data. SSHRB ratings would have at least two equal...