PERCEPTION OF SPEECH SOUNDS

双重知觉是一种实验室现象，其中一个人 刺激，或一个刺激成分，同时贡献了两个 人类听众的独特感知。的主要演示 这种现象涉及改变关键部件的质量 指语音音节(/da/或/ga/)，以便把成分听出来 作为一个单独的非语言事件(嗡嗡声)，同时也有助于 对音节的感知。重要的问题是 此演示反映了一种特殊的语音处理模式 信息，或听觉中的一种广义感知倾向 将刺激物归因于特定声源的系统。许多 语音感知现象可以在非人类灵长类动物身上复制。 猴子表现出的感知能力不能归因于 人类独有的语音处理机制，这可能是由于 一般的听觉机制。相反，知觉任务上的 人类听众成功，猴子失败是很好的潜在候选者 用于人类的特殊处理机制。在1997年，我们进行了 非人灵长类动物的双重知觉测试。这些实验 使用合成的/da/和/ga/音节作为刺激。双工测试 感知对于理论构建是有价值的，因为它们提供了一种 对初始状态的两种对立模型的临界检验 人类语音处理的潜在机制。

Duplex perception is a laboratory phenomenon in which one stimulus, or one stimulus component, simultaneously contributes to two distinct percepts in human listeners. The primary demonstrations of this phenomenon involve altering the quality of a critical component of a speech syllable (/da/ or /ga/) so that the component is heard out as a separate, nonspeech event (a chirp) while also contributing to the perception of the syllable. The important question is whether this demonstration reflects a specialized mode for processing speech information, or a generalized perceptual tendency in the auditory system for attributing stimuli to a particular sound source. Many speech perception phenomena can be replicated in nonhuman primates. The perceptual abilities that monkeys demonstrate cannot be attributed to uniquely human speech processing mechanisms and may be due to more general auditory mechanisms. Conversely, perceptual tasks on which human listeners succeed and monkeys fail are good potential candidates for special-processing mechanisms in humans. In 1997, we conducted Duplex Perception tests with nonhuman primates. These experiments used synthetic /da/ and /ga/ syllables as stimuli. Tests of Duplex Perception are valuable for theory construction in that they provide a critical test of the two opposing models of the initial status of the mechanisms underlying speech processing in humans.