need help girls, although Jack had the hearing test doen at 4 days and was fine, I think his hearing is not good or not there, he just doesn't seem to react to noises, I noticed it as mums group monday one baby cried and all the others started except jack he just lay there

I have been shaking things in his ears ad he doesn't seem to look for sound I clapped real loud near one ear and he kept looking at me not towards sound I am unsure what to do