Hi,
This is real! We started our startup based on this principle. Do note that these emissions do not occur often, think about up to 10-100 per hours in stress states. For a small background read, read this (not our research): https://www.cell.com/cell/fulltext/S0092-8674(23)00262-3
If you are interested I recommend using a MEMS microphone, sampling at 384 or 500 kHz and triggering at frequencies between 20-200 kHz.
There is several people who have made these solutions for detecting bats using pico's: https://www.geeky-gadgets.com/raspberry-pi-bat-detector-17-0...
If you want something off the shelf look into something like this: https://batsound.com/
That's perfect, thank you!
> Do note that these emissions do not occur often, think about up to 10-100 per hours in stress states.
I think I must be misreading. If one wants to detect these signals being emitted by plants, why is 10–100 per hour not often? I'd think that having to wait 6 minutes, or, to play it safe, even an hour would still be way more informative than finding out about the stress only when its effects were visible to the eye.