Free-field binaural unmasking in budgerigars (Melopsittacus undulatus)
Free-field binaural unmasking in budgerigars (Melopsittacus undulatus)
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DOI：
10.1037/0735-7044.111.3.590
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发表时间：
1997-06-01
影响因子：
1.9
通讯作者：
Dooling, RJ
中科院分区：
文献类型：
--
作者：
Dent, ML;Larsen, ON;Dooling, RJ
噪声中信号的检测对于理解听力机制以及听觉系统在更自然的条件下如何运作非常重要。对于人类来说，如果信号和噪声在空间上分离（双耳掩蔽释放），听觉系统会获得一些改善。相对于大型哺乳动物，头部较小的鸟类在分离噪声和信号源方面处于劣势，因为耳间时间差异要小得多。研究了虎皮鹦鹉中与噪声中音调检测相关的两种双耳现象。当信号和噪声出现在虎皮鹦鹉的右侧且相关噪声出现在其左侧时，虎皮鹦鹉表现出 8 dB 的自由场双耳掩蔽释放。当信号和噪声方位角分离 90 度时，虎皮鹦鹉还表现出 9 dB 的空间掩蔽释放。这些结果与在人类和其他头部更大的哺乳动物中发现的结果相似。
The detection of signals in noise is important for understanding bath the mechanisms of hearing and how the auditory system functions under more natural conditions. In humans, the auditory system gains some improvement if the signal and noise are separated in space (binaural masking release). Birds with small heads are at a disadvantage in separating noise and signal sources relative to large mammals, because interaural time differences are much smaller. Two binaural phenomena in budgerigars related to the detection of tones in noise were examined. Budgerigars show 8 dB of free-field binaural masking release when signal and noise are presented to their right side and correlated noise is presented to their left side. Budgerigars also show a spatial masking release of 9 dB when a signal and noise are separated in azimuth by 90 degrees. These results are similar to those found in humans and other mammals with much larger heads.