Most noise-blocking headphones fall into two categories: they use some kind of material to absorb or scatter noise, or they use active cancellation that creates a signal to oppose the noise signal.

ASICFPGA Advanced 2D+3D Noise Reduction Core: Noise reduction is a key issue in any camera system to improve the visual appearance of the images. As the light level decreases, the noise level ...

The best noise ... and unwanted background noise. We’ve reviewed countless noise-cancelling headphones, assessing battery life, comfort, sound quality, features, and noise reduction in a range ...