Dent Micheal L, McClaine Elizabeth M, Best Virginia, Ozmeral Erol, Narayan Rajiv, Gallun Frederick J, Sen Kamal, Shinn-Cunningham Barbara G
Department of Psychology, University at Buffalo, State University of New York, Buffalo, NY 14260, USA.
J Comp Psychol. 2009 Nov;123(4):357-67. doi: 10.1037/a0016898.
Budgerigars and zebra finches were tested, using operant conditioning techniques, on their ability to identify a zebra finch song in the presence of a background masker emitted from either the same or a different location as the signal. Identification thresholds were obtained for three masker types differing in their spectrotemporal characteristics (noise, modulated noise, and a song chorus). Both bird species exhibited similar amounts of spatial unmasking across the three masker types. The amount of unmasking was greater when the masker was played continuously compared to when the target and masker were presented simultaneously. These results suggest that spatial factors are important for birds in the identification of natural signals in noisy environments.
使用操作性条件反射技术，对虎皮鹦鹉和斑胸草雀识别斑胸草雀歌声的能力进行了测试，测试环境中存在来自与信号相同或不同位置的背景掩蔽声。针对三种频谱时间特征不同的掩蔽声类型（噪声、调制噪声和鸟鸣合唱）获得了识别阈值。两种鸟类在三种掩蔽声类型中表现出相似程度的空间解掩蔽。与目标声和掩蔽声同时呈现相比，掩蔽声持续播放时的解掩蔽量更大。这些结果表明，空间因素对鸟类在嘈杂环境中识别自然信号很重要。
