Audio acquisition and analysis with ARM Cortex-M0 and I2S microphone

[wjmb]

There is the github of BEEP: https://github.com/beepnl/BEEP.

I am not sure what is in there.

[Andreas]

@hsors

First access to knowledge about new innnovative tools developed within the B-GOOD project.

Can we therefore hope that the software will be open source?

When BEEP is involved, their part will hopefully be open source anyway. I dearly hope that resources from other partners within B-GOOD will be handled and published in the same spirit.

@wjmb

There is the github of BEEP: GitHub - beepnl/BEEP: BEEP - Open source bee monitoring - App/API/Measurement system.

I am not sure what is in there.

The audio acquisition and FFT part is in the firmware repository:

• https://github.com/beepnl/beep-base-firmware/blob/main/Source/Code/nRF/PRJ/Sensors/audioFFT.h
• https://github.com/beepnl/beep-base-firmware/blob/main/Source/Code/nRF/PRJ/Sensors/audioFFT.c
• https://github.com/beepnl/beep-base-firmware/blob/main/Source/Code/nRF/PRJ/App/audio_app.h
• https://github.com/beepnl/beep-base-firmware/blob/main/Source/Code/nRF/PRJ/App/audio_app.c

The corresponding telemetry fields are listed at:

• BEEP/public/app/js/constants.js at v3.0.1 · beepnl/BEEP · GitHub
• BEEP/app/Transformer/SensorTransformer.php at v3.0.1 · beepnl/BEEP · GitHub

Everyone is welcome to explore further parts of the code base from there.

[clemens]

@wjmb

And, to illustrate the difference in acoustics, here is a side-by-side comparison for two days where the weather was quite similar. Despite the hive being two weeks older and foraging conditions might have changed a little, I think the differences seen between the two days are mostly a result of the differences in acoustics as a result of adding another chamber to the “spaarkast”.

In today’s Beep 2022 event a picture was posted about the B-Good project.
For audio monitoring the mic is mounted on the floor of the hive. So it can also pick up more noise from outsid, especially with a mesh at the floor.

A big variation sounds for me not too bad, in case we expect a lot of informaion from audio this information must be “stored” somewhere. So a new super makes bee moving top and makes room so it could also be a good indicator to have information in this data.