Raatgever J, Bilsen F A
J Acoust Soc Am. 1986 Aug;80(2):429-41. doi: 10.1121/1.394039.
A theory is presented that describes the binaural processing of interaural time or phase differences. It is an elaboration of the central spectrum concept for the explanation of dichotic pitch phenomena [F. A. Bilsen, "Pitch of noise signals: Evidence for a 'central spectrum'," J. Acoust. Soc. Am. 61, 150-161 (1977)]. The generation is postulated for central activity patterns (CAP) due to binaural interaction. From these CAPs the central processor selects specific spectral information that constitutes the information for lateralization, dichotic pitch, binaural masking, etc. Here, a strategy is assumed to be based on central spectra (CS) rather than on interaural cross correlation. For the calculation of the central activity patterns a number of assumptions have been introduced. The peripheral filters are supposed to be infinitesimally narrow. The analog filter outputs from corresponding filters at both ears are thought to interact by means of a linear delay-and-add mechanism. The squared output (power) of such a binaural (addition) network constitutes the CAP. The theory has been tested with lateralization and BMLD measurements using dichotic stimulus configurations characteristic of the perception of dichotic pitch. The predictions of the model concerning the pitch and the lateralization of the pitch images as well as the BMLD patterns for this kind of stimuli are confirmed.
本文提出了一种描述双耳间时间或相位差双耳处理的理论。它是对用于解释双耳分听音调现象的中心频谱概念的详细阐述[F. A. 比尔森，《噪声信号的音调：“中心频谱”的证据》，《美国声学学会杂志》61，150 - 161（1977）]。假定由于双耳相互作用会产生中枢活动模式（CAP）。中枢处理器从这些CAP中选择特定的频谱信息，这些信息构成了用于声源定位、双耳分听音调、双耳掩蔽等的信息。在此，假设一种策略基于中心频谱（CS）而非双耳互相关。为了计算中枢活动模式，引入了一些假设。假定外周滤波器无限窄。认为来自双耳相应滤波器的模拟滤波器输出通过线性延迟相加机制相互作用。这种双耳（相加）网络的平方输出（功率）构成了CAP。该理论已通过使用具有双耳分听音调感知特征的双耳刺激配置进行的声源定位和双耳掩蔽级差（BMLD）测量进行了测试。该模型关于音调、音调图像的声源定位以及此类刺激的BMLD模式的预测得到了证实。
