Hi my baby is 2.5 months old. We went for vaccine and normal check up.; That time when the doctor made a rattle sound,; baby dint turn towards the direction of rattle.; Is there any problem in the hearing?; usually when the babies turn toward the direction of sound? I'm very worried. Doctor told to wait for another month. If she is not responding,; we can go for hearing test.; But my baby getting shock while blasting crackers, door Sound extremely.; Even she will stop crying when I sing to her or make rattle sound.