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What's active noise cancelling headphones and passive cancelling headphones?

What's active noise cancelling headphones and passive cancelling headphones?

Update Time:2022/5/17
Active noise cancelling headphones is set up a special noise reduction circuit in the headset. Generally,  it throughs the audio receiver (such as micro microphone) and anti-noise chip by receiving and analyzing the frequency of external noise, then produce the opposite frequency that weaken each other or offset in order to achieve the purpose of shielding noise.
Passive noise cancelling headphones is achieved the noise reduction effect through the sound insulation material or special structure on the headsets. However, long-wearing the passive noise cancelling headphoens maybe make the ears ache and excessive sound pressure will even affect the hearing, so it must choose the  headphones with soft earmuffs.