Here is a video of Shatner & Letterman in 1996 talking about their tinnitus with a less serious tone (I guess due to being in a talk show). After watching this a few years back, it eases my anxiety a lot about my tinnitus, knowing that these guys have it too (Shatner said he was suicidal too initially) and yet they manage to still live a productive life and are now still doing fine.