Dolby took a hit on third-quarter revenue that came in below Street expectations and issued a weaker-than-expected revenue outlook for the full year. The company best known for its audio and video entertainment equipment said it earned $51.5 million, or 48 cents per share. That’s down 17 percent from $61.7 million, or 55 cents, in the same period a year earlier. Analysts expected 51 cents.