On. the binding of successive sounds: Perceiving shifts in nonperceived pitches
On. the binding of successive sounds: Perceiving shifts in nonperceived pitches
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DOI：
10.1121/1.1850209
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发表时间：
2005-02-01
影响因子：
2.4
通讯作者：
Ramos, C
中科院分区：
文献类型：
--
作者：
Demany, L;Ramos, C
很难单独听出具有同步起始和偏移的等幅纯音“和弦”的各个分量。在本研究中，使用 300 毫秒的随机（不和谐）和弦（成分间隔至少为 1/2 八度）证实了这一点。在每个和弦之后，经过可变的静音延迟后，听众会听到一个单一的纯音，该纯音要么与和弦的一个分量相同，要么在两个分量之间的频率的一半。这两种类型的序列无法可靠地区分。然而，我们还发现，如果和弦后面的单个音调的频率比其其中一个成分稍微低或高（例如 1/12 八度），则相同的听众会对这种关系敏感。他们可以感知到相应方向的音调变化。因此，可以感知到未感知到的频率/音高的变化。这种矛盾的现象为人类听觉系统中存在自动“频移检测器”提供了心理物理学证据。这里报告的数据表明，此类探测器在听觉场景分析的早期阶段运行，但可以被一对相隔几秒钟的声音激活。 (C) 2005 年美国声学学会。
It is difficult to hear out individually the components of a "chord" of equal-amplitude pure tones with synchronous onsets and offsets. In the present study, this was confirmed using 300-ms random (inharmonic) chords with components at least 1/2 octave apart. Following each chord, after a variable silent delay, listeners were presented with a single pure tone which was either identical to one component of the chord or halfway in frequency between two components. These two types of sequence could not be reliably discriminated from each other. However, it was also found that if the single tone following the chord was instead slightly (e.g., 1/12 octave) lower or higher in frequency than one of its components, the same listeners were sensitive to this relation. They could perceive a pitch shift in the corresponding direction. Thus, it is possible to perceive a shift in a nonperceived frequency/pitch. This paradoxical phenomenon provides psychophysical evidence for the existence of automatic "frequency-shift detectors" in the human auditory system. The data reported here suggest that such detectors operate at an early stage of auditory scene analysis but can be activated by a pair of sounds separated by a few seconds. (C) 2005 Acoustical Society of America.