The alarm call of the little ground squirrel (Spermophilus pygmaeus), like those of six other Eurasian ground squirrels, contains a high-frequency component. In males, the peak and maximum frequencies of the high-frequency component are higher than in females. Biphonation of the alarm calls of Sp. pygmaeus, Sp. musicus, Sp. xanthoprymnus, and Sp. alaschanicus has been demonstrated, with the low- and high-frequency components generated by different sources in the vocal tract. The material was collected in the field.

中文翻译：

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地松鼠（哺乳动物，啮齿类）的声音信号中的性重音和联音。

小地松鼠（Spermophilus pygmaeus）的警报声与其他六个欧亚地松鼠的警报声一样，包含高频成分。在男性中，高频分量的峰值和最大频率高于女性。Sp的警报呼叫的变位。pygmaeus，Sp。musicus，Sp。xanthoprymnus和Sp。已经证明了铝板颤音，其低频和高频成分是由声道中的不同来源产生的。该材料是在现场收集的。