[Naracion]

This is tangential to the software techniques, but have you tried using throat microphones? They're essentially the microphone counterpart to the bone conducting headphones. They're aimed at use cases where there's a lot of noise (originally created for paragliding but also used in biking scenarios), and low voice scenarios (eg covert operations and even to amplify voice from people having speech problems due to things like Parkinson's disease).

I'm using them to record multiple people in the same room but avoid cross-talk (for data collection in a research study). The audio isn't great, but I've used transcription services and they seem to be able to make the words out just fine.