US Patent 7109849 Mosquito dispersing device

A mosquito dispersing device having means for generating a mosquito dispersing pitch pattern having a frequency in the range of at least one of a wing beat frequency of a dragonfly and a wing beat frequency of a damselfly, means for generating a signal having a frequency of the mosquito dispersing pitch pattern for use with an amplifier, and means for amplifying the signal to power at least one speaker to produce vibrations of the mosquito dispersing pitch pattern in a dispersing area to rid the area of mosquitos.