It's a simple proyect to animate an image when you speek to your microphone, just need to open the "microfono.html" with your browser and it will works.
You can use it with the browser feature in OBS but by default it will not activate the microphone capabilities, so you need to use a flag when you run the OBS like this:
obs --use-fake-ui-for-media-stream
or in flatpak
flatpak run com.obsproject.Studio --use-fake-ui-for-media-stream