[adamsjd1 (OP)]

What is happening in a person's brain that causes the physical reaction of goosebumps or that tingling feeling in the back of your neck when certain sounds are heard?  Why do some sounds affect one person but not others?

[evan_au]

If (like me) you have never heard of it, ASMR=Autonomous Sensory Meridian Response
See: https://en.wikipedia.org/wiki/Autonomous_sensory_meridian_response