[Principles of the acoustic communication between humans and birds].

We analyzed the mechanism of alarm call generation in various bird species, species-specific calls in closely related species, and intraspecific differences in calls. Production of these signals proved to rely on common mechanism: variation of temporal indices within the frequency range limited by morphological structures of the vocal apparatus. These mechanisms underlie development of acoustic synthesizers mediating communication with birds and control of their behavior. The obtained data are discussed in terms of these signals processing by the auditory system of birds.