He was nominated for Academy Awards in the category Best Sound for the 2006 film Flags of Our Fathers and the 2014 film American Sniper .
Walt Martin ( April 8 , 1945 -- July 24 , 2014 ) was an American production sound mixer .
Walt Martin was nominated for Academy Awards in the category Best Sound for the 2006 film Flags of Our Fathers and the 2014 film American Sniper .
Walt Martin ( April 8 , 1945 -- July 24 , 2014 ) was an American production sound mixer .