Look Ma, no hands!
How the bad sound disappears
Not all headsets have noise cancellation technology, but those that do use a cool technology to blot out distracting sounds and leave voices untouched.
Chuck White of DAS explains that every sound has a distinct wave shape:
“Noise-canceling technologies first rely on small microphones that detect the sounds in a given environment. A digital signal processor determines what sound wave is required to cancel the unwanted sound wave and then it creates that sound and amplifies it through speakers or headphones.
“Imagine a ‘positive’ sound and a ‘negative’ sound created at virtually the same time, and these two sounds cancel themselves out.”