Stern R M, Slocum J E, Phillips M S
J Acoust Soc Am. 1983 May;73(5):1714-22. doi: 10.1121/1.389395.
Just-noticeable differences (jnds) of both interaural time delay (ITD) and interaural intensity difference (IID) were measured for binaural tones in the presence of broadband maskers. The tones were presented at 50 dB SPL, the target frequency was 500 Hz, and the masker frequency was 100-1000 Hz, with various combinations of ITD and IID. The time and amplitude jnds exhibit similar dependencies on target-to-masker ratio and masker type. At a given target-to-masker ratio, discrimination was generally best in the presence of diotic maskers and worst in the presence of the interaurally out-of-phase maskers. Results for the other masker types examined tended to fall in between these two extremes. Many of these data trends are consistent with predictions of the lateralization model and the position-variable model based on auditory-nerve activity.
在存在宽带掩蔽声的情况下，针对双耳音调测量了耳间时间延迟（ITD）和耳间强度差（IID）的恰可察觉差异（jnds）。音调以50 dB声压级呈现，目标频率为500 Hz，掩蔽声频率为100 - 1000 Hz，并采用了ITD和IID的各种组合。时间和幅度恰可察觉差异对目标与掩蔽声的比率以及掩蔽声类型呈现出相似的依赖性。在给定的目标与掩蔽声比率下，通常在双耳掩蔽声存在时辨别效果最佳，而在耳间异相掩蔽声存在时最差。所研究的其他掩蔽声类型的结果往往介于这两个极端情况之间。这些数据趋势中的许多都与基于听觉神经活动的侧向化模型和位置可变模型的预测一致。
