I have learned over the last few days not to overlook the impact of not being able to hear. Over the last couple of weeks I had become increasingly exasperated by the fact my OH did not appear to be understanding anything I said to him until I noticed he was changing the batteries in his hearing aids for the second time in two days. He said they did not seem to be working and when I checked them they are not working at all. I know the tubes do block from time to time. So I dug around and found his old aids and suddenly he can hear me, things at home are much calmer and he is much happier. Appointment with the hearing centre made. Kicking myself for not realising before and something for all carers to consider. If a PWD actually cannot hear what is being said to them they have no chance of being able to process the information and if the loss of hearing is quite gradual they probably do not have the ability to identify the problem.