An academic paper describing the engineering design of the AquaPing acoustic leak sensor is available for free download at the IEEE Tech Archive:

https://doi.org/10.36227/techrxiv.23849154.v1

It collects and organizes much of the technical details from the campaign updates into a single, concise document (Note: This is a preprint that has not been peer-reviewed).

If you have questions or comments, we welcome input on the project GitHub.