Listener weighting of cues for lateral angle: The duplex theory of sound localization revisited
Listener weighting of cues for lateral angle: The duplex theory of sound localization revisited
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DOI：
10.1121/1.1471898
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发表时间：
2002-05-01
影响因子：
2.4
通讯作者：
Middlebrooks, JC
中科院分区：
文献类型：
--
作者：
Macpherson, EA;Middlebrooks, JC
虚拟听觉空间技术用于量化在确定宽带，低通和高通噪声爆发的感知到的侧面角度时，用于量化听觉时间差（ITD），耳间差异（ILD）和光谱提示的相对强度。听众报告了通过耳机呈现的虚拟目标的明显位置，并通过听众自己的方向传递功能进行过滤。通过将信号延迟或衰减一只耳朵（最多600个MUS或20 dB）或通过一个或两只耳朵的光谱提示来操纵刺激。通过检查由此产生的定位响应偏见来确定操纵提示的听众加权。根据为纯音定义的双面理论，听众的ITD重量很高，而低通刺激的ILD重量很小，而对于高通刺激的ILD重量很大。对于高通刺激，大多数（但不是全部）听众的重量低。通过振幅调节刺激或通过刺激刺激减小，可以增加这种重量。对于宽带刺激，ITD重量大于或等于给出的ILD。单声频谱提示的操纵和室内光谱对横向角度判断的影响很小。 （c）2002美国声学学会。
The virtual auditory space technique was used to quantify the relative strengths of interaural time difference (ITD), interaural level difference (ILD), and spectral cues in determining the perceived lateral angle of wideband, low-pass, and high-pass noise bursts. Listeners reported the apparent locations of virtual targets that were presented over headphones and filtered with listeners' own directional transfer functions. The stimuli were manipulated by delaying or attenuating the signal to one ear (by up to 600 mus or 20 dB) or by altering the spectral cues at one or both ears. Listener weighting of the manipulated cues was determined by examining the resulting localization response biases. In accordance with the Duplex Theory defined for pure-tones, listeners gave high weight to ITD and low weight to ILD for low-pass stimuli, and high weight to ILD for high-pass stimuli. Most (but not all) listeners gave low weight to ITD for high-pass stimuli. This weight could be increased by amplitude-modulating the stimuli or reduced by lengthening, stimulus onsets. For wideband stimuli, the ITD weight was greater than or equal to that given to ILD. Manipulations of monaural spectral cues and the interaural level spectrum had little influence on lateral angle judgements. (C) 2002 Acoustical Society of America.