Ralph’s voice stood out to me when I started watching him again in the Cobra Kai series a few years ago, and he sounds the same in recent interviews as well so I don’t think he alters his voice for that character. He sounds much more… “elfish” or nasally these days; not necessarily higher pitched, but how you’d sound if you put on a Bugs Bunny voice.
I just watched him again tonight in an interview on Letterman in 1992 around the time My Cousin Vinney came out; I hadn’t heard his voice since then but to me it’s very different now. Like today, decades ago his normal voice sounded the same as his big movie characters at the time; he never seemed to alter his voice for roles as far as I can tell.
He sounded normal 30 years ago, but (to me) more child-like today. Am I imagining this?