Newborn hearing screening

I got a letter today from the hospital reminding me that I have refused the newborn hearing screening. I explained to them I did not feel it was necessary to take my newborn son into a hospital when he had had a lovely homebirth and we were resting at home. I understand that babies can be born with hearing loss and I'm aware of the risk factors but I'm confident that if I had any concerns about B's hearing that I would contact the clinic straight away. I'm going to continue to watch him as he grows and check for reactions he makes to sounds as he grows older and the sounds he makes as he grows older.