Are divers upset by the noise of seal scarers?
Humans are far less sensitive to underwater noise than are marine mammals, are most unlikely to be upset by seal scarers and will certainly not come to any physical harm from exposure to this level of sound. Users of the Ace Aquatec scrammers are advised to switch to LISTEN mode when divers are in the cages to eliminate the possibility of a diver being distracted by the sudden noise and making a mistake.