Autonomous Sensory Meridian Response (ASMR)

"Autonomous Sensory Meridian Response (ASMR) is a physical sensation characterised 
by a pleasurable tingling that typically begins in the head and scalp, and often moves 
down the spine and through the limbs. Certain sights and sounds trigger ASMR”

ASMR trigger - the sound of a pencil on paper

ASMR trigger - The sound of fingers on news print

I happened to come across ASMR while researching sounds art, the idea that sound
can create a physical sensation is really interesting and not something I have considered before.
Apparently different people have different triggers when it comes to
ASMR anything from listening to fingernails softly scratching a book cover to
barely audible whispering in foreign languages. There is no solid evidence behind
triggers so they are often found through trial and error.

There is a growing community of people making ASMR trigger videos on YouTube 
as a growing number of people seek out the videos to feel the claiming effects of ASMR. 
Many people have also reported that listening to these videos can help with insomnia, 
as they are so soothing. As I research further in to sounds art and sound in general it amazes 
me what a strong sense sound is and the effects it has on the body.

Link to a visual explanation of ASMR