Grating, strained qualities appear in our yells because we’re pushing air through our vocal cords too forcefully, something you know already if you’ve ever woken up with no voice after yelling all night at a concert. Amongst other qualities, the team wanted to know how well the roughness of scary music matched the roughness of our screams. Trevor and her colleagues recorded the sounds of some people screaming and collected bits of music composed for the peak moments of tension in horror movies, like during a monster attack. “That's what we're sort of looking for: How is music kind of mirroring the same cues you hear in the voice?” “A lot of those sounds are, in my opinion, kind of like a template in your head,” Trevor says. Screams are like laughter, however, in that both are more distinct sounds that could be copied into music, whether a composer knows they’re mimicking them or not. A melody might sound happy because the notes bounce around a scale, the way our speech rises and falls when we’re in a good mood, Trevor says. Some associations between music and our emotions are harder to identify, says Caitlyn Trevor, a music cognition researcher at the University of Zurich. One theory goes as far as suggesting that music and speech evolved together as techniques our ancestors used to get their feelings across. Researchers have long suggested that music conveys specific feelings because the notes imitate sounds people make when expressing those sentiments.
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