"Hundreds of thousands of troops have come back with at least moderate hearing loss, and the nature of the injury can often be degenerative. Veterans Affairs pays out more than a billion dollars a year on disability payments for severe hearing loss, and..."
https://www.washingtonpost.com/news/checkpoint/wp/2016/04/12/we-treat-hearing-loss-as-an-inevitable-cost-of-war-it-shouldnt-be/
Vk