Tyler R S, Hall J W, Glasberg B R, Moore B C, Patterson R D
J Acoust Soc Am. 1984 Nov;76(5):1363-8. doi: 10.1121/1.391452.
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.
针对6名听力正常的受试者和12名患有耳蜗性听力损失的受试者，在存在带缺口噪声掩蔽器的情况下测定了2千赫兹正弦信号的阈值。按照帕特森和尼莫·史密斯的方法[《美国声学学会杂志》67, 229 - 245 (1980)]，采用了将缺口对称和不对称地置于信号频率两侧的条件。使用滤波器的圆形指数形式计算滤波器低频侧和高频侧的听觉滤波器形状。在6名听力受损的受试者中，听觉滤波器形状呈现出低频侧较浅的边缘，表明对掩蔽向上扩展具有明显的易感性。在2名听力受损的受试者中，滤波器形状呈现出高频侧较浅的边缘，表明对掩蔽向下扩展具有明显的易感性。另外两名阈值损失较轻的受试者具有比正常情况更陡峭且更对称的滤波器，这表明可能存在轻微的传导性损失或源于感音神经性的衰减因素，且与频率分辨率的下降无关。在其余两名受试者中，听觉滤波器的选择性过小，以至于无法可靠地确定其形状。
