Soundproof - Noise Cancellation

Noise Cancellation

Noise cancellation generators for active noise control are a relatively modern innovation. A microphone is used to pick up the sound that is then analyzed by a computer; then, sound waves with opposite polarity (180° phase at all frequencies) are output through a speaker, causing destructive interference and cancelling much of the noise.

Read more about this topic:  Soundproof

Famous quotes containing the word noise:

    “There is always a certain noise in applause: even in the applause we give ourselves.”
    —Friedrich Nietzsche (1844–1900)