Nice, however the mentioned github link ( https://github.com/loganwilliams/passive-acoustic-listening ) does not exist (anymore?).

That's a cheap whale. I wonder how they managed to fit it in.

A note to just be a bit careful passively monitoring ocean acoustics, it’s easy to fall foul of military / security forces, they don’t like anything that can fingerprint a vessel.

I worked on DAS acoustic monitoring for subsea power cables (to monitor cable health!), turns out they are basically a submarine detection system.

Last Chance to See has a fun bit about listening for dolphins in the Yangtze by taking a regular microphone and putting a condom over it. Always wondered how they sealed the end.

TIL about "plug-in power", that seems to be a thing that some sound recording devices with 3.5 mm "phono" jacks can provide.

Here [1] is a page at Klover, and here [2] is one at Shure. Not sure if there's a formal specification for this, or if it's just something that manufacturers started doing.

[1]: https://www.kloverproducts.com/blog/what-is-plugin-power

[2]: https://service.shure.com/s/article/difference-between-bias-...