Technology: How do NOISE CANCELLATION Work ? what is noice cancellation Explained in Hindi / Urdu

Dosto, yeh baat aap ny kahean na kahean zror soni ho ge k yeh headphone noice cancellation hy ya is phone main noice cancellation mic hy to dosto is video mein maine aap ko Noise cancellation k baare mein he bataia ha.k Yeh kya hy? kaise kaam karta hy? or is k kya fayde hain?video ko Like or Share krna mat bhholiya ga,Aap ka din Accha guzry.Allah Hafiz........ Share, Support, Subscribe!!!