Fidell S, Horonjeff R, Teffeteller S, Green D M
J Acoust Soc Am. 1983 Feb;73(2):628-38. doi: 10.1121/1.389008.
Masking of low-frequency sinusoids of varying durations by Gaussian noise of varying spectral shape was measured in three different studies. Common solutions to technical problems associated with control and specification of low-frequency signals were used in the three studies. If interpreted in terms of Fletcher's critical ratio assumptions, data from the first study lead to the inference that the masking bandwidth is inversely related to signal frequency below about 200 Hz. Data from the second study rule out the likelihood that the apparent increase in masking bandwidth is attributable to changes in auditory integration times at low frequencies. The data of the third study suggest that the apparent increase in auditory filter bandwidth at low frequencies is more adequately explained by a decrease in observers' detection efficiency than by broadening of the filter bandpass.
在三项不同的研究中，测量了具有不同频谱形状的高斯噪声对不同持续时间的低频正弦波的掩蔽情况。这三项研究都采用了与低频信号的控制和规范相关的技术问题的常见解决方案。如果根据弗莱彻的临界比率假设来解释，第一项研究的数据表明，在约200赫兹以下，掩蔽带宽与信号频率成反比。第二项研究的数据排除了掩蔽带宽明显增加是由于低频听觉整合时间变化的可能性。第三项研究的数据表明，低频时听觉滤波器带宽的明显增加，用观察者检测效率的降低来解释比用滤波器通带的拓宽来解释更为合适。
