I don't like using voice assistants in public as much as I don't like talking on the phone in public: it's loud around so I wouldn't hear the voice feedback, I

I don't like using voice assistants in public as much as I don't like talking on the phone in public: it's loud around so I wouldn't hear the voice feedback, I don't like disturbing people around... However I use cortana on my phone all the time in public by typing my sentance instead of saying it out loud. I assume siri and ok Google let you do this as well, otherwise how do people with speaking/hearing disability use these assistants in general?