Informational Masking in Normal-Hearing and Hearing-Impaired Listeners Measured in a Nonspeech Pattern Identification Task.
Informational Masking in Normal-Hearing and Hearing-Impaired Listeners Measured in a Nonspeech Pattern Identification Task.
复制标题
在非语音模式识别任务中测量的正常听力和听力受损的听众中的信息掩蔽。
DOI：
10.1177/2331216516638516
复制
发表时间：
2016-04-08
影响因子：
2.7
通讯作者：
Kidd G Jr
中科院分区：
文献类型：
--
作者：
Roverud E;Best V;Mason CR;Swaminathan J;Kidd G Jr
感音神经性听力损失（SNHL）患者在多频环境中的听力通常比听力正常（NH）的听众更困难。虽然感觉神经性听力损失的外周效应肯定会导致这种困难，但听觉信息的中枢处理差异也可能有所贡献。为了探讨这个问题，重要的是要考虑NH和这些听力受损（HI）的听众之间的周边差异，以便在多频听力中心的影响可以检查。在本研究中，NH和HI听众进行了音调模式识别任务，在两个遥远的中心频率（CF），850和3500赫兹。为了控制刺激的外围表征的差异，以相同的感觉水平（15 dB SL）呈现模式，并且调整包括模式的音调的频率偏差，以在两个CF处跨所有收听者获得相等的安静模式识别性能。音调序列，然后同时在两个CF（信息掩蔽条件），和听众被要求选择性地参加一个源（CF）或CF之间的分配注意力，并确定在每次试验后指定的CF模式。在执行模式识别任务所需的频率偏差方面，两组之间存在很大差异。在补偿这些差异后，NH和HI听众之间的信息掩蔽条件有很小的差异。HI的听众表现出略大的性能之间的不对称性低和高CF比NH的听众，可能是由于中央的差异，在各组之间的频率加权。
Individuals with sensorineural hearing loss (SNHL) often experience more difficulty with listening in multisource environments than do normal-hearing (NH) listeners. While the peripheral effects of sensorineural hearing loss certainly contribute to this difficulty, differences in central processing of auditory information may also contribute. To explore this issue, it is important to account for peripheral differences between NH and these hearing-impaired (HI) listeners so that central effects in multisource listening can be examined. In the present study, NH and HI listeners performed a tonal pattern identification task at two distant center frequencies (CFs), 850 and 3500 Hz. In an attempt to control for differences in the peripheral representations of the stimuli, the patterns were presented at the same sensation level (15 dB SL), and the frequency deviation of the tones comprising the patterns was adjusted to obtain equal quiet pattern identification performance across all listeners at both CFs. Tonal sequences were then presented at both CFs simultaneously (informational masking conditions), and listeners were asked either to selectively attend to a source (CF) or to divide attention between CFs and identify the pattern at a CF designated after each trial. There were large differences between groups in the frequency deviations necessary to perform the pattern identification task. After compensating for these differences, there were small differences between NH and HI listeners in the informational masking conditions. HI listeners showed slightly greater performance asymmetry between the low and high CFs than did NH listeners, possibly due to central differences in frequency weighting between groups.