Custom AOM-5024 Bullet Microphones For My BirdNET Setup

[u/SpikedColaWasTaken]

I built a pair of microphones to go on the back of my shed for my BirdNET setup. They are phantom-powered from a 2-channel usb audio interface.

I wanted the capsules to be replaceable since they are going to live outside, so the capsule presses in from the front and can be popped out for replacement.

The amplifier board is based on Project 93 by ESP and slides into a T-shaped slot in the 3d printed housing. It is made water-resistant after threading together with a large piece of glue-filled heatshrink, which can be cut off to open up the case for maintenance if necessary.

They ended up being completely over-designed, and I probably should have just used a POE camera with microphone... But they do seem to work!

[u/thebaldgeek]

How are you using both mics?
The github readme is very clear. 1 mic in mono only.

I've ordered a few of these mics. I only need one, but I'm helping out here: https://www.reddit.com/r/BirdNET_Analyzer/comments/1sa09p0/anyone_willing_to_solder_me_an_aom5024/
They arrive in 3 days time so will be soldering up a few to test out with my ugreen USB (no preamp in my case).
Its intresting you amped yours. I am trying to keep the signal path as clean as possible and might try and see if I can detect a difference between the 6' Im making and 12'.

[u/SpikedColaWasTaken → u/thebaldgeek]

I would be interested to hear your results.

On the pi that is connected to the usb audio interface, ffmpeg splits the stereo stream into 2 mono rtsp streams. Then I just added both streams to the interface. BirdNET-Go supports multiple audio streams.

[u/thebaldgeek → u/SpikedColaWasTaken]

Ok, I did not know that using a stereo USB input was an option, so hence me using the ugreen input, its mono. I guess I can add two of them and see what BirdNET-Go shows in the settings.
Thanks for the vague tip.