Amazon has introduced a new feature to Prime Video called Dialogue Boost. It’s intended to isolate dialogue and make it louder relative to other sounds in streaming videos on the service. Ars Technica reports:

Amazon describes how it works in a blog post: “Dialogue Boost analyzes the original audio in a movie or series and intelligently identifies points where dialogue may be hard to hear above background music and effects. Then, speech patterns are isolated and audio is enhanced to make the dialogue clearer. This AI-based approach delivers a targeted enhancement to portions of spoken dialogue, instead of a general amplification at the center channel in a home theater system.”

Not all content will be eligible for the dialogue boost feature, though — at least not yet. Amazon says it “has initially launched on select Amazon Originals worldwide” like The Marvelous Mrs. Maisel and The Big Sick. While this is partly an accessibility feature for people who are hard of hearing, Amazon is also responding to a widespread complaint among viewers. A 2022 survey found that 50 percent of 1,260 American viewers “watch content with subtitles most of the time,” many of them citing “muddled audio” and saying that it’s more difficult to understand dialogue in movies and TV shows than it used to be. […] The company hasn’t announced when the feature will expand to more content. But we wouldn’t be surprised to see rapid expansion — not just from Amazon, but from other streamers offering similar features, too.