For the source text click/tap here: Nedarim 73
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Perhaps the phrase “and her husband hears it” Num 30:8 regarding oaths:
ח וְשָׁמַע אִישָׁהּ בְּיוֹם שָׁמְעוֹ, וְהֶחֱרִישׁ לָהּ: וְקָמוּ נְדָרֶיהָ, וֶאֱסָרֶהָ אֲשֶׁר-אָסְרָה עַל-נַפְשָׁהּ--יָקֻמוּ.
8 and her husband hear it, whatsoever day it be that he heareth it, and hold his peace at her; then her vows shall stand, and her bonds wherewith she hath bound her soul shall stand.
does not mean that hearing is indispensable to the nullification of a vow, so that even a deaf man can nullify his wife’s vows.
Rava said: Come and hear a baraita interpreting that verse: “And her husband hears it”; this excludes the wife of a deaf man.
We cite the Sire then explore the wonderful review of modern responsa regarding sign language and its impact on the halachic definition of deaf mute...