Abstract: A marine and land transmission detraction and deterrence device designed to protect swimmers, scuba divers, surfers, hikers, hunters, campers and other individuals engaged in water and/or land activities from attacks by sharks as well as from attacks from other marine and land predators of human beings. The device emits a high frequency pitch in varying sequential intervals that is easily heard and recognized by sharks and/or by other targeted land and marine human predators. The personal protective device includes a sound generator for reproducing a sound known to repel predators; a piezoelectric speaker; and a power supply for supplying electrical energy to the sound generator and speaker contained in a waterproof package.

Abstract: A personal protective device (and method of its use) comprising a marine and land transmission detraction and deterrence device designed to protect swimmers, scuba divers, surfers, hikers, hunters, campers and other individuals engaged in water and/or land activities from attacks by sharks as well as from attacks from other marine and land predators of human beings. The device emits a high frequency pitch in varying sequential intervals that is easily heard and recognized by sharks and/or by other targeted land and marine human predators. The personal protective device comprises sound generator means for reproducing a sound known to repel predators; a piezoelectric speaker; and a power supply for supplying electrical energy to the sound generator means and speaker contained in a waterproof package.