Does timbral brightness scale with frequency and spectral centroid?

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Abstract
Two models that predict perceived timbrai brightness in terms of the centroid of the frequency spectrum were investigated. One model simply uses the centroid of the frequency spectrum, the other divides this same value by the fundamental frequency: the latter scales the centroid of the frequency spectrum with the fundamental frequency. Different single tone and pitch combinations, presented sequentially, were compared. Participants were not asked to ignore pitch differences and intervals of greater than an octave were compared. The results indicate that brightness is much better correlated with frequency spectrum centroid (r = 0.513, p less than or equal 0.01) than with the ratio of the centroid of the frequency spectrum to the fundamental frequency (r = 0.030. p = 0.441).
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Schubert, Emery
Wolfe, Joseph
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Publication Year
2006
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Journal Article
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