The Super Quad Blaster QB-4 is a full-featured ultrasonic bird control system that gets rid of stubborn bird infestations with a "Silent to Humans" audio attack. This automated sound system uses four speakers to emit high frequency sound waves and audio signals. The sounds confuse, disorient, and intimidate pest birds to quickly scare them away from the effective area up to 6,500 square feet. The Super QB-4 is an electronic oscillator tuned between 22 and 30 khz, beyond the range of human hearing, but perfectly audible to birds and other pest animals. The intense ultrasonic sound is measured at 112 dB, nearly equivalent of a jet airliner taking off. Birds don't linger around very long when exposed to this noise.