Dog Barking Near Baby's Ear

My girlfriend and her sister live together with my baby. The girlfriend's sister has retriever and its bark is really loud (well I have had tinnitus so might be just sensitive to noise!) but it barks near the baby's ear. I am worried it could damage him. He often puts his hands behind his ear when he sleeps. Is he hearing noises in the back of his head?

 

Hi Textbook,
It is quite normal for babies sleep with their hands behind their ears but if you are concerned about the dog you could mention it in a nice way as you have tinnitus but im sure the mummy would not put her baby in any danger......lots of love glynis

 

Dog or baby. The choice makes itself.