I had the idea to build a talkbox from an Organelle M. The result looked like this:
However, as it turns out, this does not work at all. The problem ultimately is, that the speaker has not enough power and isn’t build for that kind of usage. Also, it’s hard to get a good enough seal without glueing the funnel to the body (which I didn’t want to do). Sound might also leak into the body of the Organelle, which reduces the output further.
Just wanted to leave this here as a warning to spare you the hassle. 