| Abstract |
We have successfully invented a bird repellent sound system that is effective in deterring birds from jet engines and turbine blades, by using a natural predatorial bird call.
Following extensive research on topics such as bird hearing capabilities, stimuli, behavioural patterns and interpreting their calls and armed with a significant amount of prior research, we visited locally Ireland's largest raptor research centre. There we spoke to experts and recorded various birds of prey calls which we later analysed to determine frequency and decibel levels. To ensure further plausibility of research we conducted an experiment which factored in a decrease in decibel level relative to distance from the emitting sound source, mimicking the change in sound registered from a plane in flight. Through use of a sound distance propagation app we determined the distance ahead of the plane our sound would reach the bird. Considering the speed of the bird at advancing and retreating positions and the plane’s advancing position we were able to assess the time it would take for the sound to reach the bird. Using the Doppler formula, we determined the frequency our chosen sound would need to be played at in order to reach the bird at the deterrence frequency of 2650 Hz. We liaised with an ecologist who provided information for our research on turbine blade strikes.
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