Someone has had his voicebox removed and therefore cannot talk.
Should his wife be making kiddush (havdala perhaps not) or lighting chanuka lights for him rather than him doing it himself and only mouthing the words?
Is it better or equal for him to be just mouthing the blessing or is it better to hear it from someone else, in this case his wife?
To the best of my knowledge, even having the voicebox removed, a person can whisper and to hear himself whisper, which is more than enough make him Yotze for himself.
Note, that for Mitzvos that require an action, like putting Teffilin or lighting Channuka candles, the reciting of the Berocho is not Meakev. Only for Mitzvos, where the saying IS the Mitzvah, like the Shabbos Kiddush, he could say in whisper or be Yotze from his wife or kids or anyone else obligated him/herself.
