title: [The parallelisms in of sound signal of domestic sheep and Northern fur seals].
abstract: The parallelisms in communicative behavior of domestic sheep and Northern fur seals within a herd are accompanied by parallelisms in parameters of sound signal, the calling scream. This signal ensures ties between babies and their mothers at a long distance. The basis of parallelisms is formed by amplitude modulation at two levels: the one being a direct amplitude modulation of the carrier frequency and the other--modulation of the carrier frequency oscillation. Parallelisms in the signal oscillatory process result in corresponding parallelisms in the structure of its frequency spectrum.
authors.forename: A A
authors.initials: AA
authors.lastname: Nikol'skiĭ
authors.forename: T Iu
authors.initials: TIu
authors.lastname: Lisitsina
mesh_terms: D000818:Animals; D005260:Female; D046069:Fur Seals / Q000502:physiology*; D008297:Male; D012756:Sheep / Q000502:physiology*; D014828:Vocalization, Animal / Q000502:physiology*