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. As you’ve probably noticed, both of these approaches ...

See noise and dynamic noise reduction ... DVD or other source at the same time. See echo cancellation. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

The cancellation effect may result from unintentional interference in a line or circuit, or it may be purposely created. For example, noise cancellation systems generate frequencies with opposite ...