Auditory filter asymmetry in the hearing impaired.
Auditory filter asymmetry in the hearing impaired.
复制标题
听力受损者的听觉过滤器不对称。
DOI：
10.1121/1.391452
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发表时间：
1984
期刊：
影响因子：
--
通讯作者：
R. Patterson
中科院分区：
文献类型：
--
作者：
R. S. Tyler;J. Hall;B. Glasberg;B. Moore;R. Patterson
对6名听力正常的听众和12名耳蜗听力损失的听众，在有陷波噪声掩蔽器存在的情况下，确定了2 khz正弦信号的阈值。[J]。Acoust。Soc。[m. 67, 229-245(1980)]，在信号频率对称和不对称放置陷波的条件下使用。使用滤波器的圆指数形式计算了滤波器的低频和高频侧的听觉滤波器形状。在六名听力受损的听者中，听觉过滤器的形状显示出一个浅的低频裙边，表明对向上传播的掩蔽有明显的敏感性。在两名听力受损的听众中，过滤器的形状显示出一个浅的高频裙边，表明明显容易向下传播掩蔽。另外两名阈值损失轻微的听者的滤波器比正常情况下更陡峭、更对称，这表明要么是传导损失很小，要么是感觉神经来源的衰减因子与频率分辨率的降低无关。在剩下的两名听者中，听觉过滤器的选择性太小，无法可靠地确定其形状。
Thresholds for 2-kHz sinusoidal signals were determined in the presence of a notched-noise masker, for six normal-hearing listeners and 12 listeners with cochlear hearing losses. Following Patterson and Nimmo Smith [J. Acoust. Soc. Am. 67, 229-245 (1980)], conditions were used where the notch was placed both symmetrically and asymmetrically about the signal frequency. The auditory filter shape for both the low- and high-frequency side of the filter was calculated using the rounded-exponential form of the filter. In six hearing-impaired listeners, the auditory filter shape showed a shallow low-frequency skirt indicating pronounced susceptibility to the upward spread of masking. In two hearing-impaired listeners, the filter shape showed a shallow high-frequency skirt, indicating pronounced susceptibility to the downward spread of masking. Two other listeners with mild threshold losses had steeper and more symmetric filters than normal, suggesting either a small conductive loss or an attenuation factor of sensorineural origin not associated with a degradation of frequency resolution. In the remaining two listeners, the auditory filter had too little selectivity for its shape to be reliably determined.