Zhang Peter Xinya, Hartmann William M
Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.
J Acoust Soc Am. 2008 Dec;124(6):3873-87. doi: 10.1121/1.2977683.
The Huggins pitch is a sensation of pitch generated from a broadband noise having a narrowband boundary region where the interaural phase difference varies rapidly as a function of frequency. Models of binaural hearing predict that the pitch image should be well lateralized. A direct psychophysical experimental method was used to estimate the lateral positions of Huggins pitch images with two different forms of phase boundaries, linear phase and stepped phase. A third experiment measured the lateral positions of sine tones with controlled interaural phase differences. The results showed that the lateralization of Huggins pitch stimuli was similar to that of the corresponding sine tones and that the lateralizations of the two forms of Huggins pitch phase boundaries were even more similar to one another. Both Huggins pitches and sine tones revealed strong laterality compression (exponent approximately 0.5). Ambiguous stimuli, with an interaural phase difference of 180 degrees , were consistently lateralized on one side or the other according to individual asymmetries-an effect called "earedness." An appendix to this article develops a new first-order lateralization model, the salient phase density model, which combines attributes of previous models of dichotic pitch lateralization.
哈金斯音高是由具有窄带边界区域的宽带噪声产生的一种音高感觉，在该区域双耳相位差随频率迅速变化。双耳听觉模型预测音高图像应能很好地进行定位。采用直接心理物理学实验方法，以线性相位和阶梯相位两种不同形式的相位边界来估计哈金斯音高图像的侧向位置。第三个实验测量了具有可控双耳相位差的纯音的侧向位置。结果表明，哈金斯音高刺激的定位与相应纯音的定位相似，并且两种形式的哈金斯音高相位边界的定位彼此更为相似。哈金斯音高和纯音都表现出强烈的定位压缩（指数约为0.5）。双耳相位差为180度的模糊刺激，根据个体不对称性始终定位在一侧或另一侧——这种效应称为“耳优势”。本文的附录开发了一种新的一阶定位模型，即显著相位密度模型，它结合了先前双耳音高定位模型的属性。
