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Someone has had his voice box removed and therefore cannot talk.
Should his wife be making kiddush (havdala perhaps not) or lighting Chanukah 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?
As far as I know, even with the voice box removed, a person can whisper and can hear himself whisper. This is more than enough to allow him to fulfill the commandment.
Note, that for commandments that require an action, like putting Teffilin or lighting Channuka candles, the reciting of the blessing is not crucial. Only for commandments, where the saying is the commandment, like the Sabbath Kiddush, he could say in whisper or be Yotze from his wife or kids or anyone else obligated him/herself.
