Muhammad described revelation as bell-like sound or a man’s visit

Evidence

Also it says in the book which is called Bukhari — this also concerns the same ‘A’ishah — that a certain man asked him how that inspiration came to him. He said, It was just like the sound of bells; and that was the more violent way for me. That sound receded from me when I yet retained what was said And sometimes an angel came to me in the form of a man and I remembered what he said. Again, the same ‘A’ishah said, I saw that inspiration descended on Muhammad, and on a day of great cold it went away from him, and abandoned him in a perspiration. — Norman Daniel, Islam and the West, 176

Categorization

• XREF: The bell-like sound and day of great cold perspiration are the very details medieval polemicists read as epilepsy — connects directly to the argument in paragraph 172. Auditory-hallucination phenomenology studies document similar experiences.