I curious to know what your son thinks of it @Neverendinstory . Does he think he can like a fulfilling life even though he experiences noise? 

Some people live very successfully with their MH - not because of the absence of symptoms, but moreso that they can manage it better.

I included. I have chronic suicidal ideation. To people out there, it seems 'wrong' or abnormal, but I've learnt that it's okay for me and my MH condition. It's one of the symptoms. I live better than well. I used to be bogged down trying to get rid of what I thought was 'abnormal'... but now, I've had a huge turnaround.

Of course it would be ideal for the noise to cease, but I'm curious to know if psychotherapy will help your son with the anxiety around the noise etc?

Only a thought here, of course. I don't know your son's condition at all. I certainly here how much you care and are concerned for him. And I'm glad you have reached out. I hope others will be able to share their lived experience of schizophrenia with you as I'm sure there are others who have been through something similar.