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Developing a low-cost open-source acoustic sensor for coral health monitoring

Supervisor

Suitable for

MSc in Advanced Computer Science

Abstract

AudioMoth (https://www.openacousticdevices.info) is an open-source low-cost acoustic recorder that is widely used for environmental monitoring. Most recently it has been deployed with partners to monitor the health of coral reefs (https://zslpublications.onlinelibrary.wiley.com/doi/10.1002/rse2.249) by using existing analysis software to post-process recordings in order to count individual invertebrate snaps and to extract ‘acoustic indices’ which measure the complexity of the soundscape. In this project, you will attempt to avoid this post-processing stage by calculating the relevant parameters of interest directly on the AudioMoth’s 48MHz ARM Cortex M4F processor. This will reduce the energy consumption of the device, facilitating longer deployments on standard batteries, and will avoid the cumbersome handling of large audio files. You will work with the end-users to understand their requirement, and you will develop the appropriate device firmware and associated configuration tools to allow a trial deployment of the solution to be performed toward the end of the project.