The behavioral response of specific animals to hearing may depend on the type of sound emitted. Pure tones are single frequencies and continuous sounds at equal intensity. Complex sounds resemble sounds occurring in nature and are composed of two or more pure tones of different frequencies that are generated simultaneously and repeated over time. High frequencies, very high frequencies and ultrasonic frequencies have very short wavelengths. Short wavelengths also have a shorter range than lower frequency sounds at a given volume. Low frequencies on the other hand have very long wavelengths. These wavelengths have a significant range and penetrate solid objects extremely well. Very low frequencies can be felt as well as heard and have the potential to make people within the field feel extremely sick if the frequency and volume are correct. Our main objective was to identify the irritating sound frequency ranges for different animal and apply them in the design of a sound frequency device that can be used for animal control.

We proposed the system for identification of animal traffic on unwanted areas and according to it the animals hearing signal are generated for their irritation resulting to the animal avoiding the area. PIR sensors are used to detect the presence of the animal. On detection of the animal presence, the system horns the ultrasonic signal for the specific animal. PIR scanning and animal recognition using ARM7, signal generator and power amplifier for driving the twitter horn with specific loudness are used in this work.