Hi, Ed
As others have said, make sure you discuss the hearing loss and neuropathy with the doctors. You might request an audiologist evaluation for the hearing loss. Bring in a notebook and show them a printed copy of a study or two re: cisplatin so they will take you seriously. If you have a caregiver, bring them along with you, particularly if they are meaner that you are.

Now, about the mask. So, my husband the scientist with the physics background was not bothered by the mask, and found it comforting that it was keeping him in correct location relative to the treatment machine. I don't know if you will find this helpful (and I was chastened for being insensitive the last time I mentioned this) but it was his reaction to the mask, and presents a different way of thinking about it. He didn't want to move even a millimeter from target!

Best wishes,
Maria