Q. In regards to the blind reading shnaim mikra using Braille, could the mute (by the removal of the voice cords) read shnaim mikra by using a voice vibrator that creates words. For that matter, can the mute make any bracha with it and have others answer amen?

A. Shages Aryeh (6), Minchas Chinuch (420), et.al., maintain that the mute can only comply with tefila, shema, brochos, reading of the megilah etc., by listening to others and being shomea keoneh. (Keren Oiroh ”“ Brochos 6b and others disagree in regards to krias shema). See Shulchan Aruch (O.H. 62: 3), Biur Halocho and Mishna Berura (ibid. 6) in regards to hirhur kedibur (thinking is as saying), that you do not comply with just thinking the words of the speech-involving mitzvos,
The way a Electrolarynx or artificial larynx speech works in this speech method, is that vibrations are generated pneumatically by an external battery operated vibrator, which is usually placed on the cheek or under the chin. It makes a buzzing vibration that reaches the throat and mouth of the user, who had a laryngectomy that removed his larynx (vocal cords/voice box). The person then modifies the sound using his/her mouth to articulate the speech. This method of speaking is quickly and easily learned, produces a strong sound, requires a device with batteries, and the use of one hand. (from; http; soundsdribrook.blogspot.com).
Horav Shlomo Miller’s Shlit’a opinion is that since without the external artificial vibrations, the mute would not be able to create by his own any speech, the words that he can now articulate are not valid in Halacha. Therefore, he would still need to hear the speech-involving mitzvos from others, and comply by being shomea keoneh. The same would apply to observing shnaim mikro.

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit’a