Sequential stream segregation in the absence of spectral cues
Sequential stream segregation in the absence of spectral cues
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DOI：
10.1121/1.424503
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发表时间：
1999-01-01
影响因子：
2.4
通讯作者：
Oxenham, AJ
中科院分区：
文献类型：
--
作者：
Vliegen, J;Oxenham, AJ
本文研究了听觉系统在连续声音的感知组织中使用的线索。特别是，研究了在没有频谱线索的情况下组织声音的能力。在第一个实验中，向听众呈现音调序列 ABA ABA...，其中音调 A 的基频 (f0) 固定为 100 Hz，音调 A 和 B 之间的 f0 差异在 1 到 11 个半音之间变化。测试了三种频谱条件：纯音、使用 500 至 2000 Hz 之间的带通区域进行滤波的谐波复合体、以及使用选择的带通区域进行滤波的谐波复合体，以便只有高于十分之一的谐波才会通过滤波器，从而严重限制了频谱信息。听众普遍报告说，当 f0 间隔超过大约四个半音时，他们可以将音调 A 和 B 分成两个单独的感知流。对于所有条件都是如此。第二个实验表明，当分散注意力的音调位于比旋律高 11 个半音的 f0 区域时，大多数听众比分散注意力的音调位于同一 f0 区域时能够更好地识别与随机分散注意力的音调交织的短无调性旋律。对于纯音和仅包含高未解析谐波的复杂音，结果相似。两个实验的结果表明，光谱分离不是感知流分离的必要条件。这表明仅基于光谱特性的流分离模型可能需要一些修改。 (C) 1999 年美国声学学会。 [S0001-4966(99)03501-8]。
This paper investigates the cues used by the auditory system in the perceptual organization of sequential sounds. In particular, the ability to organize sounds in the absence of spectral cues is studied. in the first experiment listeners were presented with a tone sequence ABA ABA..., where the fundamental frequency (f0) of tone A was fixed at 100 Hz and the f0 difference between tones A and B varied across trials between 1 and 11 semitones. Three spectral conditions were tested: pure tones, harmonic complexes filtered with a bandpass region between 500 and 2000 Hz, and harmonic complexes filtered with a bandpass region chosen so that only harmonics above the tenth would be passed by the filter, thus severely limiting spectral information. Listeners generally reported that they could segregate tones A and B into two separate perceptual streams when the f0 interval exceeded about four semitones. This was true for all conditions. The second experiment showed that most listeners were better able to recognize a short atonal melody interleaved with random distracting tones when the distracting tones were in an f0 region 11 semitones higher than the melody than when the distracting tones were in the same f0 region. The results were similar for both pure tones and complex tones comprising only high, unresolved harmonics'. The results from both experiments show that spectral separation is not a necessary condition for perceptual stream segregation. This suggests that models of stream segregation that are based solely on spectral properties may require some revision. (C) 1999 Acoustical Society of America. [S0001-4966(99)03501-8].