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Formal acoustic analysis of finger taps and pronation\u2010supination showed a decrement in sound intensity and number of taps over time. Oscillations in performance correlated with a parkinsonian tremor. We interpret these findings as the audible equivalent of bradykinesia and tremor. Listening to bradykinesia and quantifying its decrement using acoustic analysis may offer a simple, objective, and reliable supplement to the neurological examination. 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