several of them initially set out to study the neuroscience of sound, or of music in particular. One mouse study led by Imke Kirste, a biologist at Duke University, found that “even though all the sounds had short-term neurological effects, not one of them had a lasting impact,” Gross writes. “Yet to her great surprise, Kirste found that two hours of silence per day prompted cell development in the hippocampus, the brain region related to the formation of memory involving the senses.” Florence Nightingale, the 19th century British nurse and social activist, once wrote that “Unnecessary noise is the most cruel absence of care that can be inflicted on sick or well.” Nightingale argued that needless sounds could cause distress, sleep loss and alarm for recovering patients. It turns out that noise pollution has been found to lead to high blood pressure and heart attacks, as well as impairing hearing and overall health. Loud noises raise stress level...
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