Culling J F
University Laboratory of Physiology, Oxford, United Kingdom.
J Acoust Soc Am. 2000 Apr;107(4):2201-8. doi: 10.1121/1.428500.
Two experiments explored the existence region of the Fourcin pitch. In each experiment, detectability was assessed by measuring listeners' ability to discriminate pitch changes. In the first experiment, the detectability of the pitch was measured as a function of the number of noises used to generate it. In the second experiment, the pitch was generated using two noises with equal and opposite interaural delays and detectability was measured as a function of the difference between these two delays, and thus of the perceived pitch height. In each case, the experimental results were compared with the predictions produced by a model of binaural unmasking, based on equalization cancellation, that had been designed to recover broadband sounds, such as speech, from interfering noise [Culling and Summerfield, J. Acoust. Soc. Am. 98, 785-797 (1995)]. The model accurately predicted the results from experiment 1, but failed to show an adequate decline in performance for small differences in interaural delay (corresponding to higher perceived pitches) in experiment 2. A revised model, based on similar principles, but using data on listeners' sensitivity to interaural decorrelation, rather than an equalization-cancellation mechanism, was able to predict the results of both experiments successfully.
两项实验探究了富尔辛音高的存在区域。在每项实验中，通过测量听众辨别音高变化的能力来评估可检测性。在第一个实验中，音高的可检测性是作为用于生成它的噪声数量的函数来测量的。在第二个实验中，使用具有相等且相反耳间延迟的两个噪声来生成音高，并且可检测性是作为这两个延迟之间的差异的函数来测量的，因此也是作为感知到的音高高度的函数来测量的。在每种情况下，都将实验结果与基于均衡抵消的双耳掩蔽模型所产生的预测进行了比较，该模型旨在从干扰噪声中恢复宽带声音，如语音[卡林和萨默菲尔德，《美国声学学会杂志》98，785 - 797(1995)]。该模型准确地预测了实验1的结果，但在实验2中，对于耳间延迟的小差异(对应于更高的感知音高)，未能显示出性能的充分下降。一个基于相似原理，但使用听众对耳间去相关敏感性的数据而非均衡抵消机制的修订模型，能够成功地预测两项实验的结果。
