You can pick a custom keyboard shortcut, and you can decide to simply press that shortcut instead of pressing and holding it.

I tried Google Docs voice typing, and it works reasonably well after setting up the correct microphone. I can speak into Docs on my laptop and use voice commands, but I must slow down, talk clearly, ...

Whether you're on the move or suffering from an unfortunate bout of carpal tunnel, there are plenty of scenarios when simply typing out passages of text on a keyboard just isn't the most feasible ...