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Updated: Nov 3, 2025

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A Portable Waterproof EEG Acquisition Device for Dolphins.

Yanchao Yu1, Ni Li1, Yan Li2

  • 1School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China.

Sensors (Basel, Switzerland)
|June 2, 2021
PubMed
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This study introduces a new, portable electroencephalogram (EEG) device for dolphins, enabling unrestricted brain signal acquisition. The lightweight, waterproof device uses suction cups and wireless communication, overcoming limitations of traditional EEG methods.

Area of Science:

  • Marine Biology
  • Neuroscience
  • Biomedical Engineering

Background:

  • Dolphin electroencephalogram (EEG) acquisition is crucial for understanding these intelligent marine mammals.
  • Existing cable-connected EEG devices hinder data collection during dolphin movement.
  • There is a need for portable, non-invasive EEG solutions for dynamic aquatic environments.

Purpose of the Study:

  • To design and develop a novel, lightweight, and portable EEG acquisition device for dolphins.
  • To enable relatively unrestricted EEG data collection in both terrestrial and underwater conditions.
  • To overcome the limitations of conventional EEG systems in mobile aquatic subjects.

Main Methods:

  • Development of an embedded main control board and acquisition board.
Keywords:
EEG acquisition devicebrain interfacedolphin

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  • Encapsulation of modules within a waterproof device (162 × 94 × 60 mm³).
  • Utilized customized suction cups with embedded electrodes and a Bluetooth module for wireless data transmission.
  • Onboard memory card for data storage during communication interruptions.

    • Main Results:

    • A functional, waterproof, and portable EEG acquisition device was successfully designed and built.
    • Initial onshore and underwater experiments demonstrated the device's capability to acquire EEG signals.
    • The device's design addresses the challenges of collecting bioelectric signals from active dolphins.

    Conclusions:

    • The developed portable EEG device offers a promising solution for dolphin brain activity research.
    • Further rigorous, long-term testing with dolphins is necessary to validate performance and analyze movement artifacts.
    • This technology has the potential to advance the study of dolphin cognition and behavior.