Gone will be the days of relaxing on the couch while watching TV, only to frantically jump up and turn the volume down when a particularly loud commercial comes on. That’s what Dolby hopes to avoid with a system introduced at CES last week, called Dolby Volume. The system introduces technology to equalize the volume accross TV channels, programs, and commercials.
I have been lucky enough to not run into this problem while watching TV, but I have many times on the computer. Ars brings up a good point though, “what happens when watching an action movie or TV show with explosions or or other sudden noises that are meant to be loud and startling.” It would be lackluster to have a climax scene in a movie be dulled down like that. Let’s assume Dolby thought of this already.
Source: Ars Technica