Almeida Andre, Schubert Emery, Smith John, Wolfe Joe
The University of New South Wales, Sydney, NSW, 2052, Australia.
Atten Percept Psychophys. 2017 Oct;79(7):1892-1896. doi: 10.3758/s13414-017-1394-6.
Brightness is an attribute often used by musicians when describing timbral characteristics. It is related to the spectral distribution of energy, as is sharpness, studied by Zwicker (Psychoacoustics: Facts and Models, 1990). In the current work, subjects adjusted the spectral slope and thus the spectral centroid (SC) of one of a pair of sounds to make it twice as bright as the other, so as to build a perceptual scale. The ratio of SC required to double brightness is a little less than 2 and decreases as the SC of the tones increases. For these tones, the ratio of brightness is statistically different from the ratio of sharpness calculated from published models.
亮度是音乐家在描述音色特征时经常使用的一个属性。它与能量的频谱分布有关，就像齐维克（《心理声学：事实与模型》，1990年）所研究的尖锐度一样。在当前的研究中，受试者调整一对声音中一个声音的频谱斜率，从而调整其频谱中心频率（SC），使其亮度为另一个声音的两倍，以此构建一个感知量表。使亮度翻倍所需的SC比值略小于2，并且随着音调的SC增加而减小。对于这些音调，亮度比值与根据已发表模型计算出的尖锐度比值在统计学上存在差异。
