Why is ASMR making so much noise?

ASMR (or Autonomous Sensory Meridian Response) is the tingling sensation that some people experience from certain sounds or sights – a “brain massager” in the words of Maria Viktorovna, known as the “ASMR Queen”. Correspondent Faith Salley talks to Viktorovna about her hugely successful “Gentle Whispering” video, and to physiology professor Craig Richard, who discusses the physiological effects of ASMR. Sally also visits New York City ASMR spa, Whisperwave.