The effect of a game call is achieved by artificially generating realistic sound of the animal. They are suitable for both carnivores and herbivores.
These lures are used since ancient times. An increasingly common practice today is to use electronic sound lures. Their great advantage is that you have a great choice of sounds, not just one as in ordinary sound lures. The sound is much cleaner and help of the speakers we hear of much greater distance. This makes an e sound bait a good helper and often preferred to attribute individual hunting.