The role of sequential stream segregation and frequency selectivity in the perception of simultaneous sentences by listeners with sensorineural hearing loss
The role of sequential stream segregation and frequency selectivity in the perception of simultaneous sentences by listeners with sensorineural hearing loss
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DOI：
10.1044/1092-4388(2001/002
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发表时间：
2001-02-01
影响因子：
2.6
通讯作者：
Stiles, D
中科院分区：
文献类型：
--
作者：
Mackersie, CL;Prida, TL;Stiles, D
本研究的目的是确定频率选择性酸顺序流分离的作用，在感知同步的句子与感音神经性听力折腾的听众。使用由男性说话者所说的一个句子和女性说话者所说的一个句子组成的句子对，对听力正常和感音神经性听力损失的听众进行了同时句子感知测试。听众被要求重复两个句子，并根据每个句子中正确重复的单词数量进行评分。对重复的第一句和第二句分别打分。使用陷波噪声方法评估频率选择性，其中在具有0、300和600 Hz频谱陷波带宽的噪声中测量1000 Hz纯音信号的阈值。使用由固定频率（A）和变化频率音调（B）组成的音调序列来测量顺序流分离。声调序列呈现阿坝_阿坝_.以低于或高于固定1000 Hz音调（A）频率的频率（B）开始的模式。最初，频率差异很大，并逐渐减少，直到听众表示，他们不能再感知分离的两个音调（融合阈值）。分数的第一句话重复显着降低随着年龄的增长。融合阈值和同时句子感知之间存在很强的关系，即使在排除年龄的影响后仍然存在。融合阈值处较小的频率差异与较高的句子分数相关。频率选择性和同时句知觉之间没有关系。结果表明，感知分离的音高模式和不同的谈话者同时说的单独的句子的能力是由相同的潜在的感知和/或认知因素介导的。
The purpose of this study was to determine the role of frequency selectivity acid sequential stream segregation in the perception of simultaneous sentences by listeners with sensorineural hearing toss. Simultaneous sentence perception was tested in listeners with normal hearing and with sensorineural hearing loss using sentence pairs consisting of one sentence spoken by a male talker and one sentence spoken by a female talker. Listeners were asked to repeat both sentences and were scored on the number of words repeated correctly in each sentence. Separate scores were obtained for the first and second sentences repeated. Frequency selectivity was assessed using a notched-noise method in which thresholds For a 1000 Hz pure-tone signal were measured in noise with spectral notch bandwidths of 0, 300, and 600 Hz. Sequential stream segregation was measured using tone sequences consisting of a fixed frequency (A) and a varying frequency tone (B). Tone sequences were presented in an ABA_ABA_... pattern starting at a frequency (B) either below or above the frequency of the fixed 1000 Hz tone (A). Initially, the frequency difference was large and was gradually decreased until listeners indicated that they could no longer perceptually separate the two tones (fusion threshold).Scores for the first sentence repeated decreased significantly with increasing age. There was a strong relationship between fusion threshold and simultaneous sentence perception, which remained even after partialling out the effects of age. Smaller Frequency differences at fusion thresholds were associated with higher sentence scores. There was no relationship between frequency selectivity and simultaneous sentence perception. Results suggest that the abilities to perceptually separate pitch patterns and separate sentences spoken simultaneously by different talkers are mediated by the same underlying perceptual and/or cognitive factors.