Another litvish learning:
From the Griz son of Rav Chaim, who questions what is the meaning of shomeah keoneh? If it means that the listener is speaking then where is his megilla and loud voice, so it must be that the one listening is speaking with the speaker’s voice who has a megilla and speaks in a loud voice. A kohen who wants to be yotzei duchenen from another kohen must still raise his hand as that is physical mitzva lieing on each kohen personally which does not transfer.