Korolev V I, Zaĭtseva K A, Rotin V V
Zh Evol Biokhim Fiziol. 1996 Jul-Aug;32(4):539-42.
The sounding signal analysis of beluga dolphin under aquatory adaptation with orientation reflexes has been conducted. It has been shown that the single sounding orientation impulse of beluga has a complex structure. Its initial part consists of a large number of components and has a great power. The main part of impulse is frequency-modulated and has a large duration and constant amplitude. The spectral analysis of beluga's signal demonstrates the low-frequency character with spectrum maximal of 1.6 kHz.
对白鲸在适应水生环境并伴有定向反射时的发声信号进行了分析。结果表明，白鲸的单次发声定向脉冲具有复杂的结构。其起始部分由大量成分组成且能量很大。脉冲的主要部分是调频的，持续时间长且幅度恒定。白鲸信号的频谱分析表明其具有低频特性，频谱最大值为1.6千赫。
