Does anyone know why certain voices can relax someone to the point they fall asleep?

In high school, I had a lady elder art teacher that lullabied me to sleep each day. First, we could barely understand her, since she talked so low. Second, she spoke in a constant monotone that made all her art students drift into slumberville.

Maybe, since this class was after lunch and the combination was responsible. We did not have NoDoz back then.

I suspect that the sound recalls from deep subconscious a similar sound from when we were just little and adults lulled us to sleep/

When I was a kid I always was listening to stories. A particular voice was always making me fall asleep.

Operant conditioning. The phenomenon started by accident—probably when you were listening late at night and were sleepy, anyway. It kept happening and you trained yourself to fall asleep at the sound of the voice. The conditioning became strong enough that even when you tried it in the middle of the day, it worked.

Lol. I have that kind of voice! My voice is low but soft, and it almost always puts my children to sleep when I read them a bedtime story.

I’ve been told I have one of those voices.
I think it’s cause the sound of what I am saying exceeds in beauty what I am saying.~