Hi teresagal again.
Exit sensations vary with each experience and the more practice you get the more the exit sensations will change. Someday you may have no vibrations and your sounds will vary from high-pitched hums to voices to no sound at all.
The 'monk' you describe sounds a lot like the Dweller on the Threshold, an entity that is widely discussed in Robert's online works. I'm not sure if all the links work (due to the site being under construction) but please check out the AD-Pedia (on my link) and search for Dweller and Noise and exit and you will find ample information on this.
Thanks.