Investigating the jurisprudential sentence regarding the Mute and use of artificial larynx in prayer

This article is going to survey fiqh rule about dumb persons’ prayer (Salat) that they cannot speak and must use "artificial larynx" or "pointed language". Based on the result of this paper, speaking (Qaraat) in prayer (Salat) for dumb persons is similar to normal persons. This results based on these reasons: first is that people assigning speaking with artificial larynx looks like people speaking normal. Second is that necessity of speaking reasons including who can speak with artificial larynx that doing with this person himself? Third is that people nominate speaking with artificial larynx, "normal speaking". Forth is that speaking with artificial larynx is more close to normal speaking than pointed language that it is substitute to normal speaking. So to these reasons, dumb persons are under necessity of speaking reasons in prayer (Salat) so they must say their prayer part like Qaraat, Takbiratol Ehram and etc with artificial larynx.