Sound Localization in Noise by Gerbils and Humans
Sound Localization in Noise by Gerbils and Humans
复制标题
沙鼠和人类噪声的声音定位
DOI：
10.1007/s10162-011-0301-4
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Grothe B
中科院分区：
文献类型：
--
作者：
Lingner A;Wiegrebe L;Grothe B
在同时存在的空间分布的掩蔽声中检测和定位目标声音是哺乳动物听觉系统面临的最具挑战性的任务之一。以往的研究表明，干扰噪声会降低信号的定位能力。为了在自由声场中直接比较沙土鼠和人类在噪声中信号处理任务中的行为表现，我们量化了它们在存在六个掩蔽噪声源的情况下对低频信号的定位能力。对掩蔽噪声的阈值进行了测量，这些掩蔽噪声是相关的还是不相关的。总体而言，沙鼠需要比人类更高的信噪比来检测低频信号；也就是说，沙鼠的行为表现比人类差得多。此外，从掩蔽源中不相关的掩蔽者切换到相关的掩蔽者会导致沙土鼠更多的掩蔽，但在人类的掩蔽中释放出来。这些结果表明沙土鼠可能不是一个很好的双耳加工动物模型。然而，在沙土鼠和人类双耳加工的数值模型中对定位阈值的模拟表明，沙土鼠的整体表现较差，掩蔽者相关性对检测阈值的相反影响可以归因于沙土鼠较小的头部尺寸和较宽的外围听滤波器。因此，目前的数据表明，双耳处理器本身(即对来自两只耳朵的信号的评估)在沙土鼠和人类中同样敏感。然而，小脑袋施加的身体限制阻碍了沙鼠在目前的范例中表现得同样好。
Detection and localization of a target sound in the presence of concurrent, spatially distributed masking sounds is one of the most challenging tasks for the mammalian auditory system. Previous studies demonstrated that the ability to localize signals is decreased by interfering noise. In order to directly compare the behavioral performance in a signal processing task in noise between gerbils and humans in the free sound field, we quantified their localization ability for a low-frequency signal in the presence of six masking noise sources surrounding the subject. Thresholds were measured both for masking noises that were correlated or uncorrelated across the masking sources. Overall, the gerbils required a higher signal/noise ratio to detect the low-frequency signal than the humans; that is, the behavioral performance of the gerbils was considerably worse than that of the humans. Moreover, switching from maskers that were uncorrelated across the masking sources to correlated maskers resulted in more masking in gerbils but in a release from masking in humans. These results would suggest that the gerbil may not be a good animal model for binaural processing. However, simulations of the localization thresholds in a numerical model of binaural processing in gerbils and humans reveal that both the inferior overall performance in gerbils and the opposite effect of masker correlation on the detection thresholds can be attributed to the smaller head size and the wider peripheral auditory filters in gerbils. Thus, the current data indicate that the binaural processor itself (i.e., the evaluation of signals coming from the two ears) is equally sensitive in gerbils and humans. However, the physical limitations imposed by the small head prevent the gerbil from performing equally well in the current paradigm.
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刺激强度对水平和上半球正中平面声音定位的影响。
影响因子：
--
作者：
J. Inoue
通讯作者：
J. Inoue
影响因子：
1.9
作者：
Dent, ML;Larsen, ON;Dooling, RJ
通讯作者：
Dooling, RJ
鳍足类空中音调掩蔽的空间释放。
影响因子：
2.4
作者：
Marla M. Holt;R. Schusterman
通讯作者：
R. Schusterman
DOI：
10.1007/s00359-006-0138-1
发表时间：
2006-10-01
影响因子：
2.1
作者：
Larsen, Ole N.;Dooling, Robert J.;Michelsen, Axel
通讯作者：
Michelsen, Axel
影响因子：
2.4
作者：
Dau, T;Puschel, D;Kohlrausch, A
通讯作者：
Kohlrausch, A