DEVICE FOR KEEP BIRDS, IN PARTICULAR PIGEONS

摘要

For keeping of birds, especially, pigeons from surfaces, such as gutter areas (3) above the surface to be sonicated (1) are arranged at least two mutually directed signal transmitter (2). About the signal generator (2) ultrasound is emitted at different frequencies against each other, resulting from the difference in frequency resulting beat frequencies, especially between 1 and 16 Hz.