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A sound WORSE than nails on a chalkboard

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What’s worse than nails on a chalkboard? A knife on a bottle, say study participants, who also rated babbling water the most pleasant of the noise options. 

“It appears there is something very primitive kicking in,” says Sukhbinder Kumar of the Neuroimaging at University College London. “It’s a possible distress signal from the amygdala to the auditory cortex.”

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