Pigeons are relatively unaffected by even the most aggressive of either of these devices. In a day when barking dogs drive neighbors crazy, sonic devices and their necessary screeching are simply not welcome. The ultra sonic device can create such havoc with you and your neighbor’s animals that you might prefer the pigeons. The Pigeon Guy understand the more powerful of these devices might even affect hearing aids and pacemakers. The maintenance on these products generally includes ongoing sound changes and nest removal in addition to scattered and ongoing scare device movement.