Because dogs have very good hearing and are sensitive to physical and mental problems, they will feel frightened when hearing sudden loud noises. Moreover, dogs’ ancestors are wolves, and the sound of firecrackers is more like gunshots, so dogs will be afraid of firecrackers. Voice. When dogs hear the sound of firecrackers, they are generally afraid to hide. If you want your dog not to be afraid of the sound of firecrackers, you need to use your mobile phone to play the sound for training. The sound should be from small to loud, so that the dog can adapt slowly. Don’t do it all at once. Playing loud sounds can easily scare dogs.