Test of a model of auditory object formation using intensity and interaural time difference discrimination.
Test of a model of auditory object formation using intensity and interaural time difference discrimination.
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DOI：
10.1121/1.402926
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发表时间：
1992-05
期刊：
影响因子：
--
通讯作者：
W. S. Woods;H. Colburn
中科院分区：
文献类型：
--
作者：
W. S. Woods;H. Colburn
听觉对象形成的模型和模型的实验评估。具体而言，预测强度歧视和耳间时间差歧视的三分量谐波复合物的中心分量的经验进行评估。中心目标成分的开始时间相对于其余的目标成分的开始时间是变化的，以便改变目标和目标成分的融合程度（相对于感知分离）。该模型，这是基于在无人值守的听觉图像（在隔离图像的情况下）的组件的衰减的想法，预测较低的灵敏度，在目标组件的信息融合与隔离的目标，和相等的灵敏度完全隔离的目标和目标隔离。结果呈现为四个科目的组件频率为400，600，和800 Hz和0或250 ms的起始时间差。目标持续时间始终为100 ms和偏移时间是相同的所有组件。主观结果与预期一致，同步开始产生一个声音对象，中心分量的重叠产生两个声音对象。此外，在同步情况下的干扰的经验结果与上述预测定性一致。然而，显着更多的干扰被发现比同步和异步条件下的预测。事实上，发现的干扰量与物体形成的简单衰减模型相矛盾。
A model of auditory object formation and an experimental evaluation of the model are described. Specifically, predictions for intensity discrimination and interaural time difference discrimination for the central component of a three-component harmonic complex are evaluated empirically. The onset time of the central, target component is varied relative to the onset times of the remaining, interferer components in order to vary the degree of fusion (versus perceptual segregation) of the target and the interferers. The model, which is based on the idea of attenuation of the components in the nonattended auditory image (in the case of segregated images), predicts lower sensitivity to information at the target component for the fused versus segregated target, and equal sensitivities for completely segregated targets and targets presented in isolation. Results are presented for four subjects with component frequencies of 400, 600, and 800 Hz and with onset time differences of 0 or 250 ms. The target duration was always 100 ms and offset times were the same for all components. The subjective results were as expected, with synchronous onsets yielding one sound object, and asynchrony of the central component yielding two sound objects. Also, the empirical results on interference in the synchronous case were in qualitative agreement with the above predictions. However, significantly more interference was found than was predicted for both synchronous and asynchronous conditions. In fact, the amount of interference found contradicts the simple attenuation model of object formation.