Sign Up

Sign Up to our Dream To Share Knowledge and ask if you are in search of knowledge with unique Concept. Be A Proud Member Of Wiki-VoW. --Team Wiki-VoW

Sign In

Wiki-VoW Welcomes Your Presence. We Are Happy To See You Again..

Forget Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

You must login to ask question.

Anonymous

​​How does Active Noise Cancelling Headphones work?

​​How does Active Noise Cancelling Headphones work?
Share
  1. Microphone – A microphone placed inside the ear cup “listens” to external sounds that cannot be blocked passively.
    Noise-canceling circuitry – Electronics, also placed in the ear cup, sense the input from the microphone and generates a “fingerprint” of the noise, noting the frequency and amplitude of the incoming wave. Then they create a new wave that is 180 degrees out of phase with the waves associated with the noise.
    Speaker – The “anti-sound” created by the noise-canceling circuitry is fed into the headphones’ speakers along with the normal audio; the anti-sound erases the noise by destructive interference, but does not affect the desired sound waves in the normal audio.
    Battery – The term “active” refers to the fact that energy must be added to the system to produce the noise-canceling effect. The source of that energy is a rechargeable battery.

    • 1
Leave an answer

Leave an answer

Choose from here the video type.

Put here the video id : https://www.youtube.com/watch?v=sdUUx5FdySs Ex: 'sdUUx5FdySs'.