The myriad ways in which video and audio impact our brains and bodies have long been studied by academia. But that research isn’t only taking place in university labs: at Dolby Laboratories, the company has been conducting its own internal research into how media can trigger reactions in human beings.
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http://www.theverge.com/2017/3/19/14949798/dolby-labs-biosensors-eeg-brain-heart-rate-movie-tv-reactions