Schwing Raoul, Nelson Ximena J, Parsons Stuart
Comparative Cognition, Messerli Research Institute, University of Veterinary Medicine Vienna, Medical University of Vienna, University of Vienna, Veterinärplatz 1, 1210 Vienna, Austria.
School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand.
J Acoust Soc Am. 2016 Nov;140(5):3739. doi: 10.1121/1.4967757.
Vocal communication requires the sender to produce a sound, which transmits through the environment and is perceived by the receiver. Perception is dependent on the quality of the received signal and the receiver's frequency and amplitude sensitivity; hearing sensitivity of animals can be tested using behavioural detection tasks, showing the physical limitations of sound perception. Kea parrots (Nestor notabilis) were tested for their ability to hear sounds that varied in terms of both frequency and amplitude by means of a simple auditory detection task. Audiograms for three kea were similar, with the region of highest sensitivity (1-5 kHz) corresponding to the frequency of the highest amplitude in kea calls. Compared with other parrots and other bird taxa, the overall shape of the kea audiogram follows a similar pattern. However, two potentially interesting differences to the audiograms of other birds were found: an increase in sensitivity at approximately 12 kHz and a decreased sensitivity to frequencies below 1 kHz.
发声交流要求发出者发出一种声音，该声音在环境中传播并被接收者感知。感知取决于接收到的信号质量以及接收者的频率和振幅敏感度；动物的听力敏感度可以通过行为检测任务来测试，这显示了声音感知的物理限制。通过一项简单的听觉检测任务，对啄羊鹦鹉（Nestor notabilis）感知频率和振幅都不同的声音的能力进行了测试。三只啄羊鹦鹉的听力图相似，最高敏感度区域（1 - 5千赫兹）对应于啄羊鹦鹉叫声中最高振幅的频率。与其他鹦鹉和其他鸟类分类群相比，啄羊鹦鹉听力图的整体形状遵循相似模式。然而，发现了与其他鸟类听力图的两个潜在有趣差异：在大约12千赫兹处敏感度增加，以及对低于1千赫兹频率的敏感度降低。
