Ask Smithsonian: How Do Noise-Canceling Headphones Work?

Our host, Eric Schulze explains how 1 + 1 = 0 when it comes to sound (1:13)

Ask Smithsonian is a weekly video series that unravels some of science's most surprising mysteries. The series is made possible through the support of GEICO. Smithsonian members could save even MORE with a special GEICO #MemberDiscount on auto insurance.

Have a question in mind? It's your turn to Ask Smithsonian.

Latest Videos

Preview thumbnail for video'This Bionic Suit May Be the Future of Prosthetics
This Bionic Suit May Be the Future of Prosthetics (4:35)
Preview thumbnail for video'This Prototype for a Robotic Flipper Was Inspired by Sea Lions
This Prototype for a Robotic Flipper Was Inspired by Sea Lions (3:51)
Preview thumbnail for video'Teen Inventor Alexis Lewis on Youth and the Innovative Spirit
Teen Inventor Alexis Lewis on Youth and the Innovative Spirit (4:38)
Preview thumbnail for video'This Woman Invented Monopoly to Combat Greed
This Woman Invented Monopoly to Combat Greed (4:42)
Preview thumbnail for video'The Smiley Face Was Invented For Corporate America
The Smiley Face Was Invented For Corporate America (3:42)
Preview thumbnail for video'How Lego Redefined Play
How Lego Redefined Play (3:28)
Preview thumbnail for video'Ice Cycle
Ice Cycle (10:08)
Preview thumbnail for video'Microalgae: Food Fertilizer and Fuel of the Future
Microalgae: Food Fertilizer and Fuel of the Future (20:11)
Preview thumbnail for video'A Sampler of Apocalypses
A Sampler of Apocalypses (25:22)