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The acoustics of laughter

A team of psychologists studied 1024 laughter episodes from young adults watching funny video clips. They found interesting sex differences in laugh types and pitches, with women producing more song-like laughs than men. Laughter is surprisingly high-pitched, with some laughs reaching frequencies of over 2,000 Hz.

SourceAmerican Institute of Physics·JournalThe Journal of the Acoustical Society of America·DateOct 3, 2001