Melody recognition in dichotic listening with or without frequency-place mismatch.
Melody recognition in dichotic listening with or without frequency-place mismatch.
复制标题
有或没有频率位置不匹配的双耳听力中的旋律识别。
DOI：
10.1097/aud.0000000000000013
复制
发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Xu,Li
中科院分区：
文献类型：
--
作者：
Zhou,Ning;Xu,Li
Objectives：本研究的目的是探讨识别退化的旋律刺激在双耳分听或没有频率-位置mismatch.Design：旋律刺激噪声声码与不同数量的通道条件下的双耳分听和单耳处理器。在两分拉链处理器中，奇数索引通道被音调匹配并呈现给左耳，而偶数索引通道被音调匹配或频率上移并呈现给右耳。在单声道处理器中，所有未移位或移位的声道都单独呈现给左耳。熟悉的旋律识别测量在16个正常听力的成年listeners.Results：性能为dichotically提出的旋律刺激没有不同的单耳提出的刺激，即使与低频谱分辨率（8通道）。在一只耳中引入谱移后，旋律识别率随着谱移的增加而降低。与频谱移位，旋律识别在两分听是不是不同的或上级在少数情况下，相对于单耳condition.Conclusions：没有频谱移位，凝聚力融合的两分提出的旋律刺激似乎并不依赖于频谱分辨率。在频谱移位的情况下，听者可能会抑制右耳中部分移位的通道，并选择性地只注意未移位的通道，从而在某些情况下导致旋律识别的两分优势。
Objectives:The purpose of the study was to examine recognition of degraded melodic stimuli in dichotic listening with or without frequency-place mismatch.Design:Melodic stimuli were noise vocoded with various number-of-channel conditions in a dichotic and monaural processor. In the dichotic zipper processor, the odd-indexed channels were tonotopically matched and presented to the left ear while the even-indexed channels were tonotopically matched or upward shifted in frequency and presented to the right ear. In the monaural processor, all channels either unshifted or shifted were presented to the left ear alone. Familiar melody recognition was measured in 16 normal-hearing adult listeners.Results:Performance for dichotically presented melodic stimuli did not differ from that for monaurally presented stimuli even with low spectral resolution (8 channels). With spectral shift introduced in one ear, melody recognition decreased with increasing spectral shift in a nonmonotonic fashion. With spectral shift, melody recognition in dichotic listening was either not different or superior in a few cases relative to the monaural condition.Conclusions:With no spectral shift, cohesive fusion of dichotically presented melodic stimuli did not seem to depend on spectral resolution. In spectrally shifted conditions, listeners may have suppressed the partially shifted channels in the right ear and selectively attended only to the unshifted ones, resulting in dichotic advantages for melody recognition in some cases.