“It turns out the sound waves associated with primate warning cries, particularly chimpanzee warning cries, are remarkably similar in appearance to the aversive, middle frequency sound waves produced by fingernails on a chalkboard,”
The gold here is that the researchers won an Ig Nobel Prize for their research!
https://www.google.com/amp/s/news.vanderbilt.edu/2006/10/06/fingernails-on-a-chalkboard-garner-vanderbilt-psychologist-ig-nobel-prize-58866/amp/
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