Bill Varney won Academy Awards for sound on 'The Empire Strikes Back' (1980) and 'Raiders of the Lost Ark' (1981). He also received Oscar nominations for "Dune" (1984) and "Back to the Future" (1985) and an Emmy nomination for the landmark television series "Roots" (1977). His other films include "The Last Waltz" (1978), "Grease" (1978), "Ordinary People" (1980), "Poltergeist" (1982), "My Favorite Year" (1982) and "Dragonheart" (1996). He led efforts in 1998 to restore sound on Orson Welles' film noir classic 'Touch of Evil.' He was 77.
http://www.latimes.com/news/obituaries/la-me-bill-varney-20110407,0,2206462.story