Acoustic birdscaring signals used by Universal-Acoustic devices are created on the basis of natural “distress” and “alarm” calls that birds raise in crisis situations. The acoustic signals for the Universal-Acoustic device are recorded by special method developed by the Aviation Ornithology Group.

By the effort of the Aviation Ornithology Group the bioacoustic birdscaring method using distress and alarm calls for bird dispersal had been put into practice on aerodromes of the Soviet Union in the late 1980’s.

100-GRD, speaker of the first Soviet bioacoustic set, airport Tallinn, 1969.