Some effects of auditory grouping factors on modulation detection interference (MDI).
Some effects of auditory grouping factors on modulation detection interference (MDI).
复制标题
听觉分组因素对调制检测干扰（MDI）的一些影响。
DOI：
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发表时间：
1991
影响因子：
2.4
通讯作者：
J. Grose
中科院分区：
文献类型：
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作者：
Joseph W. Hall;J. Grose
当在侧翼频率处存在幅度调制时，检测在目标频率处存在幅度调制的能力降低。这种效应被称为调制检测干扰（MDI）[Yost和Sheft，J. Acoust.美国社会85，848-857（1989）]。对MDI的一种解释认为掩蔽频率和目标频率由听觉系统分组在一起，使得难以单独分析每个频率处的调制。本研究调查的条件下，时间门控的目标和侧翼频率的操纵，以使频率或多或少可能被分组在一起的听觉系统和感知为来自一个单一的假定来源。第二个实验操作试图在谐波或频谱接近度的基础上从感知上分离掩蔽和目标频率。实验结果表明，旨在提高掩蔽和目标频率分离的操作降低了MDI效应的幅度。这通常支持一种解释，即MDI在某种程度上与听觉分组有关。进行最后一个实验，其中受试者必须检测振幅调制的存在，但也必须识别两个频率分量中的哪一个携带调制。受试者往往很难区分两个频率中哪一个是调幅的，即使调制本身是清晰可闻的。得出的结论是，MDI效应的一部分可能是由于听觉系统的能力差，将调制与调制的载波。（250字处删节）
The ability to detect the existence of amplitude modulation at a target frequency is reduced when amplitude modulation exists at a flanking frequency. This effect has been termed modulation detection interference (MDI) [Yost and Sheft, J. Acoust. Soc. Am. 85, 848-857 (1989)]. One explanation for MDI holds that the masking and target frequencies are grouped together by the auditory system such that it is difficult to analyze the modulation at each frequency separately. The present study investigated conditions where the asynchrony of temporal gating of the target and flanking frequencies was manipulated in order to make the frequencies more or less likely to be grouped together by the auditory system and perceived as originating from a single putative source. A second experimental manipulation attempted to perceptually segregate the masking and target frequencies on the basis of harmonicity or spectral proximity. The results of the experiments indicated that manipulations that were intended to enhance the segregation of the masking and target frequencies reduced the magnitude of MDI effects. This generally supported an interpretation that MDI is related in some way to auditory grouping. A final experiment was performed in which the subject had to detect the presence of amplitude modulation, but also had to identify which of two frequency components carried the modulation. Subjects were often poor in discriminating which of two frequencies was amplitude modulated, even when the modulation itself was clearly audible. It was concluded that part of the MDI effect might be due to the poor ability of the auditory system to associate modulation with the carrier of the modulation.(ABSTRACT TRUNCATED AT 250 WORDS)