Uni- and multidimensional identification of rise time, spectral slope, and cutoff frequency.
Uni- and multidimensional identification of rise time, spectral slope, and cutoff frequency.
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上升时间、频谱斜率和截止频率的单维和多维识别。
DOI：
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发表时间：
1994
影响因子：
2.4
通讯作者：
S. L. Campbell
中科院分区：
文献类型：
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作者：
S. L. Campbell
绝对识别的上升时间，光谱斜率，和截止频率进行了评估，使用复杂的音调，包括前40个谐波的200赫兹。每个维度的范围仅限于与自然音乐和语音相关的范围。基线一维固定背景任务产生了1.5 - 2.0比特的信息，表明听众可以一致地识别每个维度至少三到四个类别。固定和流动的背景信息传输意味着上升时间在感知上与其他维度是分离的。光谱斜率和截止频率显示出相当大的完整性（固定背景与流动背景信息传递的比值为1.08 - 5.03），但程度随经验而降低（复检比值为1.03 - 2.64）。刺激组合，最大限度地提高了高频率的频谱区域的差异与增加的信息传输和更大的分离性，这表明在音色识别的“锐度”的功能作用。总的多维信息传输接近相应的一维流动背景值的总和，支持信息传输的一般可加性和使用一维流动背景任务来有效地估计多维分辨率的可行性。
Absolute identification of rise time, spectral slope, and cutoff frequency was evaluated using complex tones comprising the first 40 harmonics of 200 Hz. Ranges of each dimension were restricted to those with relevance to natural music and speech. Baseline unidimensional fixed-background tasks yielded 1.5-2.0 bits of information, indicating that listeners could consistently identify at least three to four categories per dimension. Fixed-and roved-background information transfers implied rise time was perceptually separable from the other dimensions. Spectral slope and cutoff frequency displayed substantial integrality (ratios of fixed-background to roved-background information transfers of 1.08-5.03), but the extent decreased with experience (retest ratios of 1.03-2.64). Stimulus combinations that maximized differences in high-frequency spectral regions were associated with increased information transfer and greater separability, suggesting a functional role for "sharpness" in timbre identifications. Total multidimensional information transfer was closely approximated by the sum of the corresponding unidimensional roved-background values, supporting both the general additivity of information transfer and the feasibility of using unidimensional roved-background tasks to estimate multidimensional resolution efficiently.