Abstract: An ultrasonic broadband frequency transducer pest repulsion system comprises: a variable frequency generator; at least one ultrasonic frequency amplifier coupled to the variable frequency generator; and a transducer unit coupled to the ultrasonic frequency amplifier. The transducer unit comprises: a first transducer tuned at a first frequency located between a lower frequency and an upper frequency; a second transducer tuned at a second frequency located between the first frequency and the upper frequency, and a third transducer tuned at a third frequency located between the second frequency and the upper frequency.