‘There is no sound coming through the ears!’
So it must be the gandhabba that is hearing directly. (But you have it Lal:”It is the mind that “sees” and “hears” in a dream”). No need of physical ears there. I know that I have heard..or, let me say, I know that words were transmitted and I received those words in a dream; or, that I ‘spoke’
words that I ‘heard’ myself speaking.
In contrast with Sumbodhi, in my case the words are in my own language though I can speak 4 others. Only on one occasion that I remember were the words in a foreign language (Italian).