I found a short news clip, "Striking the Right Note" in Taste For Life (November 2011). According to a research study conducted at Baycrest Centre for Geriatric Care (9-13-11), "Lifelong musicians experience fewer age-related hearing problems than non-musicians."
I doubt this applies to rock musicians however since I've known many rock musicians who started losing their hearing in their 30s and 40s.
However, if you wish to check out this intriguing news bite, go to http://www.tasteforlife.com
Also in this publication, "Listening to music can ease cancer patients' anxiety and reduce their pain..."