This may not be new to you, but it's new to us. Plus, it seems to be a much more common term now! ASMR are basically videos of people whispering about a million different things or eating...it's supposed to be relaxing. It's supposed to be the opposite of what nails on a chalk board are.
"Autonomous sensory meridian response (ASMR) is a euphoric experience characterized by a static-like or tingling sensation on the skin that typically begins on the scalp and moves down the back of the neck and upper spine, precipitating relaxation."
It's not relaxing. It's just plain creepy.