hearing

My 3months old baby doesn't not turn her head to sound. But when her focus is on me and i talk to her, she will respond. She get startled by loud sound when she is sleeping as well. But when she is wake and there are loud sounds, she ignore them completely. Is this something I should be concern. She passed her hearing test at birth. My worry is that her ear drum may be affected as I always shout loudly at my toddler while carrying her.