
Method "elctro acoustic" with a focus on the voice signal in amplitudo with particular frequency on the "sonic". Bird repellent equipment system according to the invention consists of 4 parts: the source of the signal, brace signal, the voice and instrument control.
The working principles of the acoustic signal with the help of a tool set at a certain frequency and then discharge amplitudo strengthened by the speaker (loudspeaker), and with the frequency signal is then a certain emanated to all directions. Acoustic signal will be received by the noisy birds as exposure to birds, so birds will feel disturbed and will be going from a location close to the speaker. (Source By "AVIASI" Magazine And LIPI)
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