Studies on captive animals have demonstrated that the probability of a flight response occurring and the strength of the avoidance behavior increased with every successive exposure. (Gӧtz & Janik, 2011) In contrast, seals have been shown to habituate rapidly to conventional acoustic deterrent devices. (Gӧtz & Janik 2010).
It has also been shown that there is a correlation between the use of conventional Acoustic Deterrent Devices and seal depredation; seals appear to associate the sound from the acoustic deterrent device with food and are lured to the farm - this is known as the ‘Dinner Bell Effect’. Considering that ADD signals can be heard from as far as 14km away, their potential to attract seals to a fishery extends over a considerable area.