Department of Experimental Audiology, Otto-von-Guericke University Magdeburg, 39120 Magdeburg, Germany.
J Acoust Soc Am. 2013 Apr;133(4):2262-71. doi: 10.1121/1.4792352.
Thresholds for sinusoids interaurally in phase (S0) and antiphase (Sπ) were measured in the presence of a diotic notched-noise masker (N0) as a function of notch width. The signal frequency was 250, 500, 1000, or 2000 Hz. For all signal frequencies, the difference between N0S0 and N0Sπ thresholds (binaural masking-level difference, BMLD) decreased continuously as the notch width increased. Model simulations showed that this result cannot be accounted for by a model that only processes the output of the auditory filter centered at the signal frequency, even if the nonlinear behavior of the monaural frequency selectivity or interaural differences in the filter shape are considered. The data were predicted well if a detrimental across-channel process was included, either by an addition of portions of the output of adjacent filters to the output of the on-frequency filter or by a notch-width dependent adverse shift in interaural phase in the binaural stage. The strength of this detrimental across-channel process tends to decrease with increasing signal frequencies.
在存在二耳带通噪声掩蔽（N0）的情况下，测量了同相信号（S0）和反相信号（Sπ）的正弦波阈限，作为缺口宽度的函数。信号频率为 250、500、1000 或 2000Hz。对于所有信号频率，随着缺口宽度的增加，N0S0 和 N0Sπ 阈限之间的差异（双耳掩蔽电平差，BMLD）连续减小。模型模拟表明，如果仅处理以信号频率为中心的听觉滤波器的输出的模型，那么这一结果是无法解释的，即使考虑了单耳频率选择性的非线性行为或滤波器形状的两耳差异。如果包括有害的跨通道处理，无论是通过将相邻滤波器的部分输出添加到通带滤波器的输出中，还是通过在双耳阶段中根据缺口宽度对两耳相位进行不利的移位，数据的预测效果都很好。这种有害的跨通道处理的强度往往随着信号频率的增加而减小。
