HEARING LOSS AND THE PERCEPTION OF COMPLEX SOUNDS

感音神经性听力障碍的特征不仅是 听觉敏感度降低，但频率也会降低 在受损的人中由于异常宽的听觉过滤器而产生的选择性 耳蜗骨。这种赤字可能产生的功能后果 包括无法充分分析光谱细节 复杂的声音，输出端的信噪比不佳 以及不正常的时间相互作用 相邻的光谱分量。这些因素可能会结合在一起 干扰语音的理解，特别是在嘈杂的情况下 环境。这一系列实验的长期目标是 是为了更全面地描述频率降低的特征 与不同程度的灵敏度损失相关的选择性和 与正常的衰老过程，以及评估的关系 在听觉过滤器带宽和识别和识别能力之间 区分宽带谐波复合体。频率选择性 将在听力受损的听众中使用切槽进行评估 利用噪声掩蔽法提取听觉信号的形状和带宽 过滤器。图的内谱表示的度量 复杂声音，和声复合体的识别，以及 谐波分量的相变判别法 复合体的评估将根据 过滤器带宽。此外，还提出了一些实验，这些实验 评估内光谱建模的准确性 带有频率选择性度量的表示法，以及 用计算机模拟听力损伤的效果 背景噪音。

Sensorineural hearing impairment is characterized not only by a reduction in auditory sensitivity, but also by a loss in frequency selectivity due to abnormally wide auditory filters in the damaged cochlea. The possible functional consequences of such a deficit include an inability to adequately analyze the spectral detail of complex sounds, an unfavorable signal-to-noise ratio at the outputs of the auditory filters, and abnormal temporal interactions among adjacent spectral components. These factors may combine to interfere with the understanding of speech, particularly in noisy environments. The long-term goals of this series of experiments are to more fully describe the characteristics of reduced frequency selectivity associated with various degrees of sensitivity loss and with the normal aging process, and to assess the relationship between auditory filter bandwidths and the ability to identify and discriminate broadband harmonic complexes. Frequency selectivity will be assessed in hearing-impaired listeners using a notched noise masking method to derive the shape and bandwidths of auditory filters. Measures of the internal spectral representation of complex sounds, identification of harmonic complexes, and discrimination of phase changes among the components of harmonic complexes will be evaluated in terms of the magnitudes of the filter bandwidths. In addition, experiments are proposed which assess both the accuracy of modeling internal spectral representations with measures of frequency selectivity, and the value of simulating the effects of hearing impairment with background noise.