Behavioral sensitivity to broadband binaural localization cues in the ferret.
Behavioral sensitivity to broadband binaural localization cues in the ferret.
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DOI：
10.1007/s10162-013-0390-3
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发表时间：
2013-08
影响因子：
2.4
通讯作者：
King, Andrew J.
中科院分区：
文献类型：
--
作者：
Keating, Peter;Nodal, Fernando R.;Gananandan, Kohilan;Schulz, Andreas L.;King, Andrew J.
关键词：
尽管雪貂已成为研究空间听力的基础和临床方面的重要模型物种，但以前的行为工作主要集中在自由场掩蔽中的声音定位和空间释放的研究。这使得很难区分不同空间线索所扮演的角色。在人类和其他物种中，耳间时间差 (ITD) 和耳间声级差 (ILD) 在方位角平面中的声音定位中发挥着关键作用，并且还有助于噪声环境中的声源分离。在这项研究中，我们使用定制耳机提供的一系列宽带噪声刺激来测量雪貂的 ITD 和 ILD 敏感性。我们的行为数据表明，雪貂对双耳提示的变化极其敏感，其表现水平接近人类。尽管对具有宽带刺激的 ITD 和 ILD 任务进行了广泛且长时间（>16 周）的测试，但测量的阈值相对稳定。对于这两种线索，敏感度在较短的持续时间内都会降低。此外，观察到改变刺激包络线对 ITD 阈值的微妙影响，但对 ILD 阈值没有影响。对这些线索的敏感性在其他方面也有所不同。虽然 ILD 灵敏度不受平均双耳水平或耳间相关性变化的影响，但相同的操作对 ITD 灵敏度产生更大的影响，当这些参数中的任何一个参数降低时，阈值都会下降。本研究中测量的双耳灵敏度在很大程度上可以解释雪貂在方位平面上定位宽带刺激的能力。我们的结果也与人类的数据大致一致，并证实雪貂是研究空间听力的优秀实验模型。
Although the ferret has become an important model species for studying both fundamental and clinical aspects of spatial hearing, previous behavioral work has focused on studies of sound localization and spatial release from masking in the free field. This makes it difficult to tease apart the role played by different spatial cues. In humans and other species, interaural time differences (ITDs) and interaural level differences (ILDs) play a critical role in sound localization in the azimuthal plane and also facilitate sound source separation in noisy environments. In this study, we used a range of broadband noise stimuli presented via customized earphones to measure ITD and ILD sensitivity in the ferret. Our behavioral data show that ferrets are extremely sensitive to changes in either binaural cue, with levels of performance approximating that found in humans. The measured thresholds were relatively stable despite extensive and prolonged (>16 weeks) testing on ITD and ILD tasks with broadband stimuli. For both cues, sensitivity was reduced at shorter durations. In addition, subtle effects of changing the stimulus envelope were observed on ITD, but not ILD, thresholds. Sensitivity to these cues also differed in other ways. Whereas ILD sensitivity was unaffected by changes in average binaural level or interaural correlation, the same manipulations produced much larger effects on ITD sensitivity, with thresholds declining when either of these parameters was reduced. The binaural sensitivity measured in this study can largely account for the ability of ferrets to localize broadband stimuli in the azimuthal plane. Our results are also broadly consistent with data from humans and confirm the ferret as an excellent experimental model for studying spatial hearing.
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影响因子：
9.8
作者：
Kacelnik O;Nodal FR;Parsons CH;King AJ
通讯作者：
King AJ
DOI：
10.1121/1.4768798
发表时间：
2013-01
期刊：
The Journal of the Acoustical Society of America
影响因子：
--
作者：
Bizley JK;Walker KM;King AJ;Schnupp JW
通讯作者：
Schnupp JW
影响因子：
3
作者：
Hartley, Douglas E. H.;Vongpaisal, Tara;Xu, Jin;Shepherd, Robert K.;King, Andrew J.;Isaiah, Amal
通讯作者：
Isaiah, Amal
影响因子：
2.4
作者：
Culling, JF;Colburn, HS;Spurchise, M
通讯作者：
Spurchise, M
影响因子：
5.3
作者：
Fischer, Brian J.;Christianson, G. Bjoern;Pena, Jose Luis
通讯作者：
Pena, Jose Luis