Are there any tangible modifications for children with Auditory Processing Disorder?

My 9 yr old son has APD and since then we haven't been able to attend church, movies or any other loud events without leaving within the first 10 minutes. Other than continuing to stick ear plugs in his ears, has anyone found any other effective way to be able to go out in public when there is such a high sensitivity level? I would love to get back into church again and attend things that he would consider loud.