Department of Hearing and Speech Sciences, 0100 Lefrak Hall, University of Maryland, College Park, Maryland 20742, USA.
J Acoust Soc Am. 2013 May;133(5):EL377-83. doi: 10.1121/1.4798269.
Previous work by Polka, Rvachew, and Molnar [Infancy 13(5), 421-439 (2008)] has reported that infants are poor at focusing their attention on a particular frequency range, and, as a result, are distracted by maskers that are outside of the target frequency range. The current study explores this effect of irrelevant distractors further and finds that 8-month-old infants are significantly less affected by maskers outside the frequency range (off-channel maskers) than by on-channel maskers. Thus while infants may display difficulty ignoring irrelevant distractors, they are able to do so to at least some degree, suggesting some ability to perceive speech from spectrally remote maskers, despite the demonstrated presence of greater informational masking at this age.
波卡、里瓦切夫和莫尔纳尔[《婴儿期》13(5), 421-439 (2008)]的先前研究报告称，婴儿很难将注意力集中在特定的频率范围内，因此会被频率范围之外的掩蔽声干扰。本研究进一步探讨了这种无关干扰物的影响，发现 8 个月大的婴儿受到频率范围之外（通道外掩蔽）的掩蔽声的影响显著小于受到通道内掩蔽声的影响。因此，尽管在这个年龄段存在更大的信息掩蔽，但婴儿可能表现出难以忽略无关干扰物，他们能够在一定程度上做到这一点，这表明他们有能力从频谱上遥远的掩蔽声中感知言语，尽管已经证明了这一点。
