You're listening to 20,000 Hertz.

The stories behind the world's most recognizable and interesting sounds.

I'm Dallas Taylor.

You probably don't think a lot about user interface or UI sounds.

These are the noises made by devices,

applications, and software we interact with. Everything from our iPhones to our airplanes

have UI sounds. We hear them all day, every day, but many of us never think twice about them. Why is that?

We're in service of the experience and to the people who use our products. We're not in

service of being noticed. In any particular experience, not being noticed is the right move.

That's Will Little John. I'm the first person to pull sounds out of an experience if they don't really serve a purpose.

He's the director of sound design at Facebook.

His team is responsible for the social media platform's U.I.S.

All the sounds in Messenger, all the sounds in Facebook.

If anyone knows about U.I sound design, it's Will.

I personally have been working in this space since the early 2000s.

Most people aren't even aware of that they're intimately interacting with sounds in a daily basis

in a way that's very, very personal to them and personal to their quality of life.

We process so much sound that our minds don't bring a lot of that to the forefront in terms of our consciousness.

But it's so powerful and how it guides and influences our daily lives that I've always felt that this is one of the most important types of work that I do is to really bring thoughtful

positive UI experiences to people through whatever products we're working on if we're interacting with something in the real world that's quite a different relationship than

leaning back and watching a film or TV. You're processing it in a different way.

Will, like many UI sound designers, believes that most of his team's work should go unnoticed by

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