Teachable Machines repo is here: GitHub - googlecreativelab/teachablemachine-community: Example code snippets and machine learning code 3
it can give you some insights but I think it’s focused on short commands (like this tutorial: Simple audio recognition: Recognizing keywords  |  TensorFlow Core 4)
That model I shared has just been published, there’s no TFJS version yet and it’s a little big (+200MB). I shared it because it’s a state of the art for Automatic Speech Recognition and can give some ideas.