Could we speak the language of dolphins? | Denise Herzing

New Section

In this section, the speaker introduces their work with dolphins in the Bahamas and their interest in dolphin intelligence. They discuss what is known about dolphin intelligence and communication.

Dolphins and Their Intelligence

• Dolphins have large brains and their brain-to-body ratio is second only to humans.

• They can understand artificially-created languages and pass self-awareness tests in mirrors.

• Dolphins use tools, such as sponges, to hunt fish in some parts of the world.

• The big question is whether dolphins have a language and what they are communicating about.

Observing Dolphins in the Bahamas

• The speaker found a community of dolphins living in clear, shallow sandbanks in the Bahamas.

• They spend their daytime resting and socializing in the shallows, but hunt in deep water at night.

• The speaker conducts research by living on a catamaran for five months every summer.

• Underwater video with a hydrophone is used to observe dolphin behavior and correlate it with sound.

Atlantic Spotted Dolphins

• Atlantic spotted dolphins are a species that the speaker works with extensively.

• They go through distinct developmental phases, making it interesting to track their behavior.

• Individual dolphins are identified through unique spot patterns on their bodies over time.

Dolphin Life Cycle

• Young dolphins learn social skills during their teenage years.

• Females become sexually mature at around nine years of age, while males mature later at around 15 years.

• Paternity tests are conducted by collecting fecal material for DNA analysis.

• The speaker has been tracking three generations of dolphins over 28 years.

Dolphin Communication

• Dolphins use various communication signals, including sounds, body postures, taste, and touch.

• Signature whistles are specific to individual dolphins and serve as a form of identification.

• Echolocation clicks are used for hunting and feeding, but can also be used socially in buzzes.

Conflict Resolution and Social Interactions

• Dolphins use burst-pulsed sounds and head-to-head behaviors to resolve conflicts.

• Resident bottlenose dolphins interact with spotted dolphins in the Bahamas, engaging in various social behaviors.

Synchrony in Communication

• Dolphins use synchrony in their sounds and body postures to communicate coordination and strength.

Whistle Complexity

• Whistles have been measured for complexity using information theory and rate high compared to human languages.

New Section

In this section, the speaker discusses the challenge of interpreting burst-pulsed sounds made by dolphins and the development of technology for two-way communication with dolphins.

Interpreting Burst-Pulsed Sounds

• Burst-pulsed sounds resemble human phonemes.

• Cracking the code of these signals is challenging without a Rosetta Stone.

• Two approaches to crack the code: interpretation and technology development.

Two-Way Communication Technology

• Keyboard interfaces have been used with species like chimpanzees and dolphins.

• An underwater keyboard in Orlando, Florida allowed humans and dolphins to exchange information.

• Dolphins showed mutual curiosity, mimicking vocalizations and inviting humans into games.

• Dolphins love to play, especially dragging seaweed (sargassum) around.

• The idea was to develop an interface that allows dolphins to request their favorite toys in real-time.

New Section

This section focuses on the challenges faced in developing a two-way communication interface with dolphins using a keyboard and how it led to the creation of a portable keyboard.

Challenges with Keyboard Interface

• Original vision: A keyboard hanging from a boat for divers and dolphins to activate keys.

• Dolphins were not interested in staying near the boat or using a keyboard.

Portable Keyboard Solution

• A portable keyboard was created that could be pushed through water.

• Four objects labeled on the keyboard: scarf, rope, sargassum (seaweed), and bow ride (a fun activity for dolphins).

• Artificially created whistles were used as acoustic signals easily mimicked by dolphins.

New Section

This section showcases video footage of interactions between humans, dolphins, and the portable keyboard during toy requests.

Toy Request Interaction

• The diver activates the rope key on the keyboard to request a rope toy.

• Dolphins respond by picking up the rope and dragging it around as a toy.

• The speaker attempts to request a toy using the acoustic signal associated with the scarf.

• The dolphin, known as "the scarf thief," is led back to the keyboard for a scarf toy request.

New Section

This section highlights the level of attention and interest shown by dolphins in the two-way communication system, leading to the development of more sophisticated technology.

Level of Attention and Interest

• Dolphins show high levels of intention, focus, and interest in the communication system.

• Video footage demonstrates prolonged interactions between humans, dolphins, and the portable keyboard.

Collaboration with Georgia Tech

• Collaboration with Georgia Tech's wearable computing group led to the development of an underwater wearable computer called CHAT (Cetacean Hearing And Telemetry).

• The diver wears the complete system, activating sounds through a keypad on their forearm.

• Acoustic signals are transmitted through an underwater speaker and localized by hydrophones.

New Section

This section explains how CHAT works and its potential for word matching during toy requests.

CHAT System Functionality

• Diver activates sounds on a keypad; they are transmitted through an underwater speaker.

• If dolphins mimic or humans play specific whistles, sounds are received and localized by hydrophones.

Word Matching Capability

• The computer can potentially match who requested a toy if there is a word match.

New Section

This section discusses how dolphins can communicate with divers using whistles and bone conduction.

Dolphin Communication

• Dolphins can hear whistles both in the water and through bone conduction.

• Divers use different whistles to request toys from dolphins.

• The goal is for dolphins to mimic the whistle and receive the requested toy.

New Section

This section explores the potential of dolphin communication and how it can be two-way.

Two-Way Communication

• CHAT is designed to empower dolphins to request things from humans.

• The communication system aims to be two-way, allowing dolphins to learn and mimic human sounds.

• Decoding natural dolphin sounds can be put back into the computerized system for interaction requests.

New Section

This section discusses using dolphin signature whistles and creating our own whistles for communication.

Signature Whistles and Interaction Requests

• Dolphin signature whistles can be stored in a computer system for specific interactions.

• Humans can create their own unique whistles and names for dolphins to request specific divers.

• Mobile technology may play a significant role in communicating with other species in the future.

New Section

This section reflects on the possibility of understanding another intelligent species' mind, such as dolphins'.

Bridging the Gap with Sensory Systems

• Dolphins are considered close to human intelligence in many ways but live in a different environment.

• Understanding another intelligent species requires bridging gaps in sensory systems.

• Imagining what it would be like to truly comprehend another species' mind is intriguing.