Pitch perception in chinchillas (Chinchilla laniger): stimulus generalization using rippled noise.
Pitch perception in chinchillas (Chinchilla laniger): stimulus generalization using rippled noise.
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龙猫（Chinchilla laniger）的音调感知：使用波纹噪声的刺激泛化。
DOI：
10.1037/0735-7036.121.4.428
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
Whitmer,WilliamM
中科院分区：
文献类型：
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作者：
Shofner,WilliamP;Yost,WilliamA;Whitmer,WilliamM
波纹噪声唤起人类听者的音高感知。当宽带噪声（WBN）通过正（+）或负（-）反馈环路被延迟、衰减并添加到原始WBN时，会产生不可重复的纹波噪声（IIRN）。IIRN [+]的音调与延迟的倒数匹配，而相同延迟的IIRN [-]的音调低一个八度。训练龙猫区分具有4 ms延迟的IIRN [+]和具有2 ms延迟的IIRN [+]，然后在具有2和4 ms延迟的IIRN [+]的刺激泛化范式中测试。行为反应的系统梯度沿着延迟维度发生，表明IIRN [+]存在与音高对应的感知维度。对IIRN [-]测试刺激的行为反应在龙猫中更易变，这表明IIRN [-]相对于IIRN [+]没有引起类似的音高。当IIRN [-]测试刺激出现在其他IIRN [-]刺激的背景下时，观察到行为反应的系统梯度。因此，当在IIRN [+]刺激的背景下呈现IIRN [-]测试刺激时，诸如音色的其他感知线索可能主导音高线索。（PsycINFO数据库记录（c）2016阿帕，保留所有权利）
Rippled noises evoke the perception of pitch in human listeners. Infinitely iterated rippled noise (IIRN) is generated when wideband noise (WBN) is delayed, attenuated, and added to the original WBN through either a positive (+) or a negative (-) feedback loop. The pitch of IIRN [+] is matched to the reciprocal of the delay, whereas the pitch of IIRN [-] for the same delay is an octave lower. Chinchillas (Chinchilla laniger) were trained to discriminate IIRN [+] with a 4-ms delay from IIRN [+] with a 2-ms delay and then tested in a stimulus generalization paradigm with IIRN [+] at delays between 2 and 4 ms. Systematic gradients in behavioral response occurred along the dimension of delay, suggesting that a perceptual dimension corresponding to pitch exists for IIRN [+]. Behavioral responses to IIRN [-] test stimuli were more variable among chinchillas, suggesting that IIRN [-] did not evoke similar pitches relative to IIRN [+]. Systematic gradients in behavioral response were observed when IIRN [-] test stimuli were presented in the context of other IIRN [-] stimuli. Thus, other perceptual cues such as timbre may dominate the pitch cues when IIRN [-] test stimuli are presented in the context of IIRN [+] stimuli.(PsycINFO Database Record (c) 2016 APA, all rights reserved)