Laterality of basic auditory perception.
Laterality of basic auditory perception.
复制标题
基本听觉感知的偏侧性。
DOI：
10.1080/1357650x.2010.541464
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发表时间：
2012
期刊：
影响因子：
1.4
通讯作者：
Bhatara,Anjali
中科院分区：
文献类型：
--
作者：
Sininger,YvonneS;Bhatara,Anjali
利用基本听觉技能(1)间隙检测、(2)频率识别和(3)强度识别来评估听觉加工的侧边性（左右耳差异）。刺激包括音调（500、1000和4000赫兹）和宽带噪声，它们分别呈现在典型成年听众的每只耳朵上。经检验的假设是，音调刺激的处理会被左耳（LE）刺激和右耳（RE）呈现的噪音增强。为了研究(1)频谱宽度对侧边性的限制，采用强度判别法对450-Hz带宽的窄带噪声（NBN）进行了评价，(2)采用频率判别法对刺激持续时间、200、500和1000 ms持续时间的音调进行了评价。在所有实验中，音调刺激均表现出左耳优势（LEA），而噪声刺激未表现出预期的左耳优势（REA）。NBN刺激无LEA，表现为噪声。刺激持续时间的变化未发现侧性的变化。音调刺激的LEA被认为是由于左耳和右耳听觉皮层之间更直接的联系，这已被证明是频谱分析和音调处理的主要部分。噪声刺激缺乏REA是无法解释的。性别对噪音刺激的偏侧性有差异，但没有统计学意义。这项研究确实建立了一个微妙但清晰的LEA处理音调刺激的模式。
Laterality (left–right ear differences) of auditory processing was assessed using basic auditory skills: (1) gap detection, (2) frequency discrimination, and (3) intensity discrimination. Stimuli included tones (500, 1000, and 4000 Hz) and wide-band noise presented monaurally to each ear of typical adult listeners. The hypothesis tested was that processing of tonal stimuli would be enhanced by left ear (LE) stimulation and noise by right ear (RE) presentations. To investigate the limits of laterality by (1)spectral width, a narrow-band noise (NBN) of 450-Hz bandwidth was evaluated using intensity discrimination, and (2)stimulus duration, 200, 500, and 1000 ms duration tones were evaluated using frequency discrimination. A left ear advantage (LEA) was demonstrated with tonal stimuli in all experiments, but an expected REA for noise stimuli was not found. The NBN stimulus demonstrated no LEA and was characterised as a noise. No change in laterality was found with changes in stimulus durations. The LEA for tonal stimuli is felt to be due to more direct connections between the left ear and the right auditory cortex, which has been shown to be primary for spectral analysis and tonal processing. The lack of a REA for noise stimuli is unexplained. Sex differences in laterality for noise stimuli were noted but were not statistically significant. This study did establish a subtle but clear pattern of LEA for processing of tonal stimuli.