AUDITORY MASKING AND CRITICAL BAND
AUDITORY MASKING AND CRITICAL BAND
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DOI：
10.1121/1.1908699
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发表时间：
1961-01-01
影响因子：
2.4
通讯作者：
GREENWOOD, D
中科院分区：
文献类型：
--
作者：
GREENWOOD, D
掩蔽听力图作为一个功能的带宽，水平和频率的掩蔽噪声进行了研究。在相反的过程中，当一个可移动的，狭窄的，近似矩形的噪声带被用作一个信号时，在一个或多个掩蔽音的存在下，确定听力图。在这两种情况下，掩蔽听力图作为带宽的函数的变化使得有可能测量临界带宽。当掩蔽刺激达到一定的“过渡”水平时，掩蔽听力图的高度和形状发生不连续的变化。如果使用亚临界或临界宽度的掩蔽噪声，则掩蔽随水平的增长在掩蔽刺激水平等于约50分贝时包含不连续性。掩蔽听力图的形状突然变化发生在同一水平。形状的变化时，纯音是掩蔽刺激包括在外观上的“凹口”一个临界带宽以上的掩蔽音的频率。与带宽参数相关的发现建议解释的关键频带和掩蔽。在过渡层发生的变化可以指示内毛细胞的阈值。
Masked audiograms were studied as a function of the band-width, level, and frequency of a masking noise. In a reverse procedure, audiograms were determined when a movable, narrow, and approximately rectangular band of noise was used as a signal in the presence of one or more masking tones. In both cases changes in the masked audiograms as a function of band width made it possible to measure critical band width. When masked audiograms were studied as a function of level, discontinuous changes in their height and shape oc-curred when the masking stimulus reached a certain "transition" level. If masking noises of subcritical or critical width were used, the growth of masking with level contained a discontinuity at a level of the masking stimulus equal to about 50 db. An abrupt change in the shape of the masked audiograms occurred at the same level. The change of shape when a pure tone was the masking stimulus consisted in the appearance of a "notch" one critical band width above the frequency of the masking tone. Finds associated with band width parameter suggest interpretations of the critical band and of masking. The changes occurring at the transi-tion level may indicate the threshold of the inner hair cells.