Deep Sea Whale Activity Monitoring Device

In order to research and monitor the activity of deep-sea life, especially of whales and coral reef biodiversity, it is vital that a capable and cost-effective method of recording sounds underwater be available. Current deep-sea sound recording solutions typically cost hundreds if not thousands of dollars, so there is a need for a low-cost solution for students and researchers looking to study marine life that maintains functionality and the capability of recording high quality audio whilst also being able to withstand the harsh environments in which it must be used.

This project aims to provide a cost-effective solution to recording whale sounds at an approximate depth of 2000 meters. Current available products are often too costly for students looking to research whale activity. The final prototype utilizes an Arduino connected to a mems microphone. Sound data is transmitted live through a cable to a computer, all electronic components are completely encased in epoxy and held together in a 3D-printed mold. Successful drop tests suggest that the combination of the 3D printed encasement and the epoxy interior sufficiently preserve the functionality of the microphone and other electronic components. Sound data transmission through a physical cable connection, while viable, is not as ideal a solution as is Bluetooth compatibility. To improve this design, an unfinished, self-contained prototype was devised that uses an esp32-s2 feather microcontroller, mems microphone, SD card for sound data storage, and inductive charging coils for wireless recharging of lithium-ion battery. Testing suggests with certainty that the wireless charging setup will function correctly through distance created by set epoxy between coils. All components planned to be fully encased in epoxy for waterproofing and pressure-proofing. Future improvements to this design revolve heavily around completion of the unfinished self-contained prototype and Bluetooth transmission of sound data to ensure waterproof and pressure-proof capabilities.