2min chapter

Lex Fridman Podcast cover image

#213 – Barry Barish: Gravitational Waves and the Most Precise Device Ever Built

Lex Fridman Podcast

CHAPTER

How Do Earphones Noise Cancelling Work?

We make the world's fancier shock absorbers just mechanical engineering just mechanical engineers this whole area but we didn't. We weren't good enough to discover gravitational waves so uh so we did another we added another feature and that is to get rid of noise you've probably noise which is you don't like. The same principle that's in these little bowsUh earphones noise canceling noise canceling so uh so how do they work they basically you go on an airplane and they sense the ambient noise from the engines and cancel it because it's just the same over and over again they cancel it. When the stewardess comes and asks you whether you want coffee or a tea or a drink

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