A new study by musicologists in Europe suggests that the shape of our ear canals, as well as our own perceptions, is to blame for our distaste in such shrill sounds.

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Interestingly, the most painful frequencies were not the highest or lowest, but instead were those that were between 2,000 and 4,000 Hz. The human ear is most sensitive to sounds that fall in this frequency range, said Michael Oehler, professor of media and music management at the University of Cologne in Germany, who was one...
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