Lutfi R A
J Acoust Soc Am. 1984 Oct;76(4):1045-50. doi: 10.1121/1.391423.
Measures of frequency selectivity from forward masking suggest sharper tuning than those from simultaneous masking. To account for this result, various interpretations involving additional tuning mechanisms have been proposed. In the present study, it is shown that a simple multiplicative relation between on-frequency forward and off-frequency simultaneous masking predicts this result quite well. The relation assumes that changes in masking produced by separating the masker from the signal in frequency, in time, and in both frequency and time are related to one another by Weber's law. The accuracy of the predictions suggests that the limits of auditory frequency selectivity are already established in simultaneous masking and that special interpretations involving additional tuning mechanisms are not required to account for the difference between simultaneous and forward measures. Implications for a dB scale of masking are discussed.
正向掩蔽的频率选择性测量结果表明，其调谐比同时掩蔽更敏锐。为了解释这一结果，人们提出了各种涉及额外调谐机制的解释。在本研究中，结果表明，频率上的正向掩蔽与频率外的同时掩蔽之间的简单乘法关系能很好地预测这一结果。该关系假定，通过在频率、时间以及频率和时间两者上分离掩蔽声与信号而产生的掩蔽变化，依据韦伯定律彼此相关。预测的准确性表明，听觉频率选择性的极限在同时掩蔽中就已确立，无需涉及额外调谐机制的特殊解释来解释同时掩蔽和正向测量之间的差异。文中还讨论了对掩蔽分贝标度的影响。
